WesWorld

Presidente Malvar, ex-HMS Princess Royal, laid down 1910, returned 1930

(Historical data)

Presidente Malvar, ex-British battlecruiser laid down 1909 (Engine 1911)

Displacement:
25,096 t light; 26,551 t standard; 28,334 t normal; 29,646 t full load

Dimensions: Length overall / water x beam x draught
701.30 ft / 701.30 ft x 88.60 ft x 28.00 ft (normal load)
213.76 m / 213.76 m x 27.01 m x 8.53 m

Armament:
8 - 13.50" / 343 mm guns (4x2 guns), 1,230.19lbs / 558.00kg shells, 1909 Model
Breech loading guns in turrets (on barbettes)
on centreline, evenly spread, 2 raised mounts
Aft Main mounts separated by engine room
16 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1909 Model
Breech loading guns in casemate mounts
on side, evenly spread
4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.57" / 40.0 mm guns (2x4 guns), 1.95lbs / 0.89kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread

Weight of broadside 10,497 lbs / 4,761 kg
Shells per gun, main battery: 150

2 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.00" / 229 mm 420.00 ft / 128.02 m 12.00 ft / 3.66 m
Ends: 3.00" / 76 mm 281.00 ft / 85.65 m 12.00 ft / 3.66 m
Upper: 4.00" / 102 mm 420.00 ft / 128.02 m 10.00 ft / 3.05 m
Main Belt covers 92 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 6.00" / 152 mm 9.00" / 229 mm
2nd: 4.00" / 102 mm - -
3rd: 2.00" / 51 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 2.50" / 64 mm, Conning tower: 10.00" / 254 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 93,890 shp / 70,042 Kw = 28.00 kts
Range 10,850nm at 10.00 kts (Bunkerage = 3,208 tons)

Complement:
68 officers and 1,187 men

Cost:
£2.514 million / $10.056 million

Distribution of weights at normal displacement:
Armament: 1,312 tons, 4.6 %
Armour: 7,768 tons, 27.4 %
- Belts: 3,070 tons, 10.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 2,508 tons, 8.9 %
- Armour Deck: 1,989 tons, 7.0 %
- Conning Tower: 201 tons, 0.7 %
Machinery: 3,810 tons, 13.4 %
Hull, fittings & equipment: 12,005 tons, 42.4 %
Fuel, ammunition & stores: 3,238 tons, 11.4 %
Miscellaneous weights: 200 tons, 0.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
42,108 lbs / 19,100 Kg = 34.2 x 13.5 " / 343 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 5.4 ft / 1.6 m
Steadiness - As gun platform (Average = 50 %): 45 %
- Recoil effect (Restricted arc if above 1.00): 0.87
Seaboat quality (Average = 1.00): 1.37

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.570
Length to Beam Ratio: 7.92 : 1
'Natural speed' for length: 26.48 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.00 ft / 9.75 m
- Forecastle (20 %): 30.00 ft / 9.14 m
- Mid (80 %): 29.00 ft / 8.84 m
- Quarterdeck (20 %): 21.00 ft / 6.40 m (29.00 ft / 8.84 m before break)
- Stern: 21.00 ft / 6.40 m
- Average freeboard: 28.06 ft / 8.55 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.8 %
- Above water (accommodation/working, high = better): 221.5 %
Waterplane Area: 43.002 Square feet or 3.995 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 178 lbs/sq ft or 869 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.79
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

(Historical data)

Filipino Prosperina-class torpedo boat, laid down 1923

Length, 181 ft x Beam, 17.7 ft x Depth, 7.5 ft
316 tons normal displacement (283 tons standard)

Main battery: 1 x 2.24-inch / 57mm 42-cal
Light battery: 2 x 0.30-inch / 7.62mm

Weight of broadside: 6 lbs

4 TT, 18.0"

Hull unarmored

Battery armor:
Main, 0.5" shields


Maximum speed for 9954 shp = 27.90 knots
Approximate cruising radius, 4700 nm / 10 kts

Typical complement: 8 officers and 35 men


Estimated cost, $399,000 (£100,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Caution: Very cramped ship with excessively poor habitability;
lacks suitable working space.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 1 tons = 0 pct
Machinery ........................ 171 tons = 54 pct
Hull and fittings; equipment ..... 104 tons = 33 pct
Fuel, ammunition, stores ......... 39 tons = 13 pct
Miscellaneous weights ............ 0 tons = 0 pct
-----
316 tons = 100 pct

Estimated metacentric height, 0.5 ft

Displacement summary:

Light ship: 276 tons
Standard displacement: 283 tons
Normal service: 316 tons
Full load: 341 tons

Loading submergence 54 tons/foot

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.12

Shellfire needed to sink: 108 lbs = 19.3 x 2.2-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.1
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 51 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.05

Relative quality as a seaboat: 1.02

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.46
Sharpness coefficient: 0.32
Hull speed coefficient 'M' = 8.12
'Natural speed' for length = 13.5 knots
Power going to wave formation
at top speed: 75 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 177 percent

Relative accommodation and working space: 39 percent


Displacement factor: 47 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.60
(Structure weight per square
foot of hull surface: 24 lbs)

Relative longitudinal hull strength: 2.90
(for 11.0 ft average freeboard;
freeboard adjustment +3.4 ft)

Relative composite hull strength: 0.70

Prosperina, laid down 1923, sold to Persia 1929
Terror, laid down 1923, SUNK 1928
Rayo, laid down 1923, sold to Persia 1929

(Historical data)

Manila, laid down 1898, refit 1914, SUNK (grounded) 1929
Angeles, laid down 1899, sold to Bulgaria 1924

Displacement:
11,132 t light; 11,661 t standard; 14,486 t normal; 16,747 t full load

Dimensions: Length overall / water x beam x draught
394.00 ft / 394.00 ft x 73.00 ft x 26.51 ft (normal load)
120.09 m / 120.09 m x 22.25 m x 8.08 m

Armament:
4 - 12.00" / 305 mm guns (2x2 guns), 850.00lbs / 385.55kg shells, 1898 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
16 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1898 Model
Breech loading guns in casemate mounts
on side, evenly spread
10 guns in hull casemates - Limited use in all but light seas
6 - 3.00" / 76.2 mm guns in single mounts, 12.00lbs / 5.44kg shells, 1898 Model
Quick firing guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 1.57" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
8 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1925 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 5,081 lbs / 2,305 kg
Shells per gun, main battery: 80

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.0" / 254 mm 228.52 ft / 69.65 m 10.25 ft / 3.12 m
Ends: 6.00" / 152 mm 165.46 ft / 50.43 m 10.25 ft / 3.12 m
Upper: 8.00" / 203 mm 228.52 ft / 69.65 m 8.00 ft / 2.44 m
Main Belt covers 89 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 4.70" / 119 mm 10.0" / 254 mm
2nd: 4.00" / 102 mm - 3.00" / 76 mm
3rd: 0.79" / 20 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 10.00" / 254 mm

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 12,897 ihp / 9,621 Kw = 17.50 kts
Range 3,900nm at 17.50 kts (Bunkerage = 5,086 tons)

Complement:
659 - 858

Cost:
£1.269 million / $5.075 million

Distribution of weights at normal displacement:
Armament: 659 tons, 4.6 %
Armour: 3,898 tons, 26.9 %
- Belts: 2,137 tons, 14.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 806 tons, 5.6 %
- Armour Deck: 826 tons, 5.7 %
- Conning Tower: 128 tons, 0.9 %
Machinery: 2,324 tons, 16.0 %
Hull, fittings & equipment: 4,205 tons, 29.0 %
Fuel, ammunition & stores: 3,354 tons, 23.2 %
Miscellaneous weights: 46 tons, 0.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,515 lbs / 6,584 Kg = 16.8 x 12.0 " / 305 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 4.4 ft / 1.4 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 83 %
- Recoil effect (Restricted arc if above 1.00): 0.38
Seaboat quality (Average = 1.00): 1.31

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.665
Length to Beam Ratio: 5.40 : 1
'Natural speed' for length: 19.85 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 63
Bow angle (Positive = bow angles forward): -5.00 degrees
Stern overhang: -3.28 ft / -1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.01 ft / 4.88 m
- Forecastle (21 %): 12.99 ft / 3.96 m
- Mid (50 %): 12.99 ft / 3.96 m
- Quarterdeck (21 %): 12.99 ft / 3.96 m
- Stern: 12.99 ft / 3.96 m
- Average freeboard: 13.25 ft / 4.04 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.4 %
- Above water (accommodation/working, high = better): 83.9 %
Waterplane Area: 22,337 Square feet or 2,075 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 135 lbs/sq ft or 660 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.04
- Longitudinal: 2.07
- Overall: 1.12
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

(Historical data)

San Pablo (B-6) ex-Chinese Lee Siu-Lung, ex-USS Mississippi - laid down 1904, to China 1914, rebuilt 1925-26, acquired 1926, SUNK 1928

Displacement:
10,792 t light; 11,837 t standard; 13,025 t normal; 13,974 t full load

Dimensions: Length overall / water x beam x draught
388.16 ft / 382.00 ft x 77.00 ft x 24.60 ft (normal load)
118.31 m / 116.43 m x 23.47 m x 7.50 m

Armament:
4 - 12.00" / 305 mm guns (2x2 guns), 925.00lbs / 419.57kg shells, 1925 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 12.00" / 305 mm guns in single mounts, 925.00lbs / 419.57kg shells, 1925 Model
Breech loading guns in turrets (on barbettes)
on side ends, evenly spread
8 - 6.10" / 155 mm guns in single mounts, 120.00lbs / 54.43kg shells, 1926 Model
Breech loading guns in casemate mounts
on side, all amidships
8 guns in hull casemates - Limited use in all but light seas
12 - 3.94" / 100 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1923 Model
Quick firing guns in casemate mounts
on side, evenly spread
4 guns in hull casemates - Limited use in all but light seas
12 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1923 Model
Quick firing guns in deck mounts
on side, evenly spread
6 - 0.98-inch / 25 mm guns (2x3 guns), 0.57-lb shells, 1925 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts
8 - 0.54-inch / 13.7 mm guns (4x2 guns), 0.11-lb shells, 1925 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts

Weight of broadside 8,820 lbs / 4,001 kg
Shells per gun, main battery: 150

2 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.00" / 229 mm 257.85 ft / 78.59 m 10.53 ft / 3.21 m
Ends: 4.00" / 102 mm 124.13 ft / 37.83 m 10.53 ft / 3.21 m
Main Belt covers 104 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 8.27" / 210 mm 9.00" / 229 mm
2nd: 12.0" / 305 mm 8.27" / 210 mm 6.00" / 152 mm
3rd: 7.00" / 178 mm - -
4th: 4.00" / 102 mm - -
5th: 0.98" / 25 mm - -
6th: 0.55" / 14 mm - -

- Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 16,930 shp / 12,630 Kw = 19.00 kts
Range 12,500nm at 12.00 kts (Bunkerage = 2,137 tons)

Complement:
609 - 792

Cost:
£1.320 million / $5.281 million

Distribution of weights at normal displacement:
Armament: 1,032 tons, 7.9 %
Armour: 4,258 tons, 32.7 %
- Belts: 1,286 tons, 9.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1,637 tons, 12.6 %
- Armour Deck: 1,228 tons, 9.4 %
- Conning Tower: 107 tons, 0.8 %
Machinery: 542 tons, 4.2 %
Hull, fittings & equipment: 4,861 tons, 37.3 %
Fuel, ammunition & stores: 2,232 tons, 17.1 %
Miscellaneous weights: 100 tons, 0.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,778 lbs / 6,703 Kg = 17.1 x 12.0 " / 305 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 3.7 ft / 1.1 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.78
Seaboat quality (Average = 1.00): 1.17

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.630
Length to Beam Ratio: 4.96 : 1
'Natural speed' for length: 19.54 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: -2.00 ft / -0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (18 %): 19.00 ft / 5.79 m
- Mid (70 %): 16.00 ft / 4.88 m (8.00 ft / 2.44 m aft of break)
- Quarterdeck (15 %): 8.00 ft / 2.44 m
- Stern: 8.00 ft / 2.44 m
- Average freeboard: 15.19 ft / 4.63 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.8 %
- Above water (accommodation/working, high = better): 106.5 %
Waterplane Area: 22,122 Square feet or 2,055 Square metres
Displacement factor (Displacement / loading): 95 %
Structure weight / hull surface area: 160 lbs/sq ft or 779 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.66
- Overall: 1.03
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

(Historical data)

Bucas Grande, ex-Peruvian Lima, ex-? Socrates, laid down 1880, rebuilt 1920, acquired 1926, SUNK 1928

Displacement:
1,307 t light; 1,362 t standard; 1,750 t normal; 2,061 t full load

Dimensions: Length overall / water x beam x draught
250.00 ft / 250.00 ft x 35.00 ft x 15.00 ft (normal load)
76.20 m / 76.20 m x 10.67 m x 4.57 m

Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1920 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1.85" / 47.0 mm guns in single mounts, 3.00lbs / 1.36kg shells, 1920 Model
Quick firing guns in deck mounts
on side ends, evenly spread

Weight of broadside 228 lbs / 103 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 1,808 ihp / 1,349 Kw = 14.10 kts
Range 5,000nm at 10.00 kts (Bunkerage = 699 tons)

Complement:
134 - 175

Cost:
£0.122 million / $0.488 million

Distribution of weights at normal displacement:
Armament: 29 tons, 1.6 %
Armour: 7 tons, 0.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 374 tons, 21.3 %
Hull, fittings & equipment: 573 tons, 32.8 %
Fuel, ammunition & stores: 443 tons, 25.3 %
Miscellaneous weights: 325 tons, 18.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,514 lbs / 687 Kg = 16.5 x 6.0 " / 152 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 1.5 ft / 0.5 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.13
Seaboat quality (Average = 1.00): 1.81

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.467
Length to Beam Ratio: 7.14 : 1
'Natural speed' for length: 15.81 kts
Power going to wave formation at top speed: 38 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 10.00 ft / 3.05 m
- Forecastle (20 %): 10.00 ft / 3.05 m
- Mid (50 %): 10.00 ft / 3.05 m
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 10.00 ft / 3.05 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.3 %
- Above water (accommodation/working, high = better): 80.5 %
Waterplane Area: 5,660 Square feet or 526 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 61 lbs/sq ft or 297 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.23
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weathe

(Historical data)

Luzon - laid down 1901, refit 1923, to Japan as payment for Balabac 1926
Mindoro - laid down 1902, scrapped 1924

Displacement:
12,622 t light; 13,201 t standard; 15,966 t normal; 18,177 t full load

Dimensions: Length overall / water x beam x draught
504.00 ft / 504.00 ft x 69.50 ft x 26.50 ft (normal load)
153.62 m / 153.62 m x 21.18 m x 8.08 m

Armament:
4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1899 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1899 Model
Breech loading guns in casemate mounts
on side, all amidships
10 guns in hull casemates - Limited use in heavy seas
18 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1899 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
4 guns in hull casemates - Limited use in heavy seas
4 - 1.57" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1917 Model
Anti-aircraft guns in deck mounts with hoists
on side ends, evenly spread, all raised mounts

Weight of broadside 2,787 lbs / 1,264 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 267.12 ft / 81.42 m 10.00 ft / 3.05 m
Ends: 2.00" / 51 mm 236.86 ft / 72.19 m 10.00 ft / 3.05 m
Main Belt covers 82 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.00" / 229 mm 5.00" / 127 mm 8.00" / 203 mm
2nd: 3.00" / 76 mm - 3.00" / 76 mm
3rd: 0.50" / 13 mm - -
4th: 0.50" / 13 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 8.00" / 203 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 20,263 ihp / 15,117 Kw = 20.00 kts
Range 4,500nm at 17.00 kts (Bunkerage = 4,976 tons)

Complement:
709 - 923

Cost:
£1.171 million / $4.683 million

Distribution of weights at normal displacement:
Armament: 348 tons, 2.2 %
Armour: 2,740 tons, 17.2 %
- Belts: 1,139 tons, 7.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 542 tons, 3.4 %
- Armour Deck: 950 tons, 5.9 %
- Conning Tower: 109 tons, 0.7 %
Machinery: 3,117 tons, 19.5 %
Hull, fittings & equipment: 6,391 tons, 40.0 %
Fuel, ammunition & stores: 3,344 tons, 20.9 %
Miscellaneous weights: 25 tons, 0.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,075 lbs / 10,466 Kg = 90.1 x 8.0 " / 203 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 5.4 ft / 1.6 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 77 %
- Recoil effect (Restricted arc if above 1.00): 0.28
Seaboat quality (Average = 1.00): 1.96

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.602
Length to Beam Ratio: 7.25 : 1
'Natural speed' for length: 22.45 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (24 %): 23.00 ft / 7.01 m
- Mid (70 %): 21.00 ft / 6.40 m (14.00 ft / 4.27 m aft of break)
- Quarterdeck (24 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 20.12 ft / 6.13 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.2 %
- Above water (accommodation/working, high = better): 144.9 %
Waterplane Area: 25,667 Square feet or 2,385 Square metres
Displacement factor (Displacement / loading): 135 %
Structure weight / hull surface area: 160 lbs/sq ft or 779 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.40
- Longitudinal: 2.69
- Overall: 1.49
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

(Historical data)

Basilan - laid down 1923, damaged beyond repair before completion, scrapped 1924

Displacement:
13,048 t light; 13,769 t standard; 15,244 t normal; 16,425 t full load

Dimensions: Length overall / water x beam x draught
654.07 ft / 639.76 ft x 68.24 ft x 24.44 ft (normal load)
199.36 m / 195.00 m x 20.80 m x 7.45 m

Armament:
9 - 10.00" / 254 mm guns (3x3 guns), 500.00lbs / 226.80kg shells, 1923 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
12 - 3.94" / 100 mm guns (6x2 guns), 32.00lbs / 14.51kg shells, 1923 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
16 - 0.98" / 25.0 mm guns (8x2 guns), 0.54lbs / 0.24kg shells, 1923 Model
Breech loading guns in deck mounts
on side, evenly spread, 6 raised mounts

Weight of broadside 4,893 lbs / 2,219 kg
Shells per gun, main battery: 150

4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.51" / 140 mm 415.85 ft / 126.75 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.51" / 140 mm 3.94" / 100 mm 5.51" / 140 mm
2nd: 1.00" / 25 mm 0.50" / 13 mm -
3rd: 0.25" / 6 mm - -

- Armour deck: 1.97" / 50 mm, Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 94,908 shp / 70,801 Kw = 31.06 kts
Range 4,185nm at 20.00 kts (Bunkerage = 2,656 tons)

Complement:
685 - 891

Cost:
£4.109 million / $16.436 million

Distribution of weights at normal displacement:
Armament: 609 tons, 4.0 %
Armour: 2,340 tons, 15.4 %
- Belts: 944 tons, 6.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 300 tons, 2.0 %
- Armour Deck: 1,059 tons, 6.9 %
- Conning Tower: 37 tons, 0.2 %
Machinery: 3,172 tons, 20.8 %
Hull, fittings & equipment: 6,876 tons, 45.1 %
Fuel, ammunition & stores: 2,197 tons, 14.4 %
Miscellaneous weights: 50 tons, 0.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,631 lbs / 7,090 Kg = 31.3 x 10.0 " / 254 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 3.2 ft / 1.0 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 9.38 : 1
'Natural speed' for length: 25.29 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 4.29 ft / 1.31 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.47 ft / 6.54 m
- Forecastle (18 %): 19.32 ft / 5.89 m
- Mid (50 %): 17.17 ft / 5.23 m
- Quarterdeck (18 %): 17.17 ft / 5.23 m
- Stern: 17.17 ft / 5.23 m
- Average freeboard: 18.05 ft / 5.50 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.0 %
- Above water (accommodation/working, high = better): 134.2 %
Waterplane Area: 29,089 Square feet or 2,702 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 153 lbs/sq ft or 748 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.14
- Longitudinal: 1.48
- Overall: 1.17
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

(Historical data)

Solitario, laid down 1905, to Rumania 1924
Avestruz, laid down 1905, to Rumania 1924
PRS D-3, laid down 1905, scrapped 1924
PRS D-4, laid down 1905, scrapped 1923
PRS D-5, laid down 1906, scrapped 1924
PRS D-6, laid down 1906, expended as target 1924
PRS D-7, laid down 1906, scrapped 1924
PRS D-8, laid down 1906, scrapped 1924
PRS D-9, laid down 1907, lost in typhoon 1923

Displacement:
1,106 t light; 1,138 t standard; 1,302 t normal; 1,432 t full load

Dimensions: Length overall / water x beam x draught
238.00 ft / 238.00 ft x 29.00 ft x 12.00 ft (normal load)
72.54 m / 72.54 m x 8.84 m x 3.66 m

Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
4 - 1.57" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1917 Model
Quick firing guns in deck mounts
on side, all amidships
3 - 0.98" / 25.0 mm guns in single mounts, 0.57lbs / 0.26kg shells, 1923 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
(on refit vessels only)

Weight of broadside 74 lbs / 33 kg
Shells per gun, main battery: 150

4 - 18.0" / 457.2 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
2nd: 0.50" / 13 mm - -
3rd: 0.25" / 6 mm - -

- Conning tower: 0.50" / 13 mm

Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 2 shafts, 27,136 shp / 20,244 Kw = 29.00 kts
Range 4,245nm at 10.00 kts (Bunkerage = 294 tons)

Complement:
107 - 140

Cost:
£0.169 million / $0.676 million

Distribution of weights at normal displacement:
Armament: 9 tons, 0.7 %
Armour: 8 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.1 %
Machinery: 876 tons, 67.3 %
Hull, fittings & equipment: 213 tons, 16.3 %
Fuel, ammunition & stores: 196 tons, 15.0 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
206 lbs / 93 Kg = 6.4 x 4.0 " / 102 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.96
Metacentric height 2.3 ft / 0.7 m
Roll period: 8.1 seconds
Steadiness - As gun platform (Average = 50 %): 21 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 0.18

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 8.21 : 1
'Natural speed' for length: 15.43 kts
Power going to wave formation at top speed: 76 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 10.10 ft / 3.08 m
- Forecastle (20 %): 10.10 ft / 3.08 m
- Mid (50 %): 10.10 ft / 3.08 m
- Quarterdeck (15 %): 10.10 ft / 3.08 m
- Stern: 10.10 ft / 3.08 m
- Average freeboard: 10.10 ft / 3.08 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 222.4 %
- Above water (accommodation/working, high = better): 61.2 %
Waterplane Area: 4,817 Square feet or 447 Square metres
Displacement factor (Displacement / loading): 30 %
Structure weight / hull surface area: 26 lbs/sq ft or 126 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.49
- Longitudinal: 1.24
- Overall: 0.54
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is cramped
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability

(Historical data)

Negros (ex-USS Montgomery) - laid down 1890, scrapped 1920
Cebu (ex-USS Marblehead) - laid down 1891, hulked 1921, sunk as target 1927

Displacement:
1,667 t light; 1,712 t standard; 2,090 t normal; 2,392 t full load

Dimensions: Length overall / water x beam x draught
269.00 ft / 269.00 ft x 37.00 ft x 14.50 ft (normal load)
81.99 m / 81.99 m x 11.28 m x 4.42 m

Armament:
1 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1905 Model
Breech loading gun in deck mount
on centreline forward
8 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1905 Model
Breech loading guns in casemate mounts
on side, evenly spread
8 guns in hull casemates - Limited use in any sea
6 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1905 Model
Quick firing guns in deck mounts
on side, evenly spread
2 - 1.46" / 37.0 mm guns in single mounts, 1.00lbs / 0.45kg shells, 1905 Model
Quick firing guns in deck mounts
on side, all amidships

Weight of broadside 601 lbs / 272 kg
Shells per gun, main battery: 10

3 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:

- Armour deck: 0.40" / 10 mm, Conning tower: 2.00" / 51 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 5,429 ihp / 4,050 Kw = 18.80 kts
Range 6,000nm at 10.00 kts (Bunkerage = 680 tons)

Complement:
153 - 200

Cost:
£0.243 million / $0.974 million

Distribution of weights at normal displacement:
Armament: 75 tons, 3.6 %
Armour: 56 tons, 2.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 49 tons, 2.4 %
- Conning Tower: 7 tons, 0.3 %
Machinery: 872 tons, 41.7 %
Hull, fittings & equipment: 663 tons, 31.7 %
Fuel, ammunition & stores: 423 tons, 20.3 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
912 lbs / 414 Kg = 14.6 x 5.0 " / 127 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.88
Metacentric height 3.1 ft / 0.9 m
Roll period: 8.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.57

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.507
Length to Beam Ratio: 7.27 : 1
'Natural speed' for length: 16.40 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.00 ft / 3.96 m
- Forecastle (12 %): 11.50 ft / 3.51 m
- Mid (70 %): 11.50 ft / 3.51 m
- Quarterdeck (10 %): 11.50 ft / 3.51 m
- Stern: 11.50 ft / 3.51 m
- Average freeboard: 11.57 ft / 3.53 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 179.4 %
- Above water (accommodation/working, high = better): 95.5 %
Waterplane Area: 6,673 Square feet or 620 Square metres
Displacement factor (Displacement / loading): 78 %
Structure weight / hull surface area: 60 lbs/sq ft or 295 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.19
- Overall: 1.01
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

(Historical data)

Pinatubo (ex-USS Vesuvius) - laid down 1887, to museum ship 1919

Displacement:
876 t light; 899 t standard; 930 t normal; 955 t full load

Dimensions: Length overall / water x beam x draught
252.40 ft / 252.40 ft x 26.50 ft x 11.80 ft (normal load)
76.93 m / 76.93 m x 8.08 m x 3.60 m

Armament:
3 - 15.00" / 381 mm guns in single mounts, 800.00lb shells, 1887 Model
Breech loading guns in deck mount
on bow with limited arc
Main guns limited to end-on fire
3 - 1.85" / 47.0 mm guns in single mounts, 3.00lbs / 1.36kg shells, 1902 Model
Quick firing guns in deck mounts
on side, all aft

Weight of broadside 2409 lbs
Shells per gun, main battery: 10

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 3,213 ihp / 2,397 Kw = 18.70 kts
Range 1,000nm at 8.00 kts (Bunkerage = 56 tons)

Complement:
83 - 109

Cost:
£0.207 million / $0.828 million

Distribution of weights at normal displacement:
Armament: 165 tons, 17.7 %
Machinery: 270 tons, 29.0 %
Hull, fittings & equipment: 441 tons, 47.4 %
Fuel, ammunition & stores: 54 tons, 5.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
239 lbs / 109 Kg = 0.2 x 14.0 " / 356 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.49
Metacentric height 1.3 ft / 0.4 m
Roll period: 9.6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.92
Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.412
Length to Beam Ratio: 9.52 : 1
'Natural speed' for length: 15.89 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 12.00 ft / 3.66 m
- Forecastle (12 %): 9.00 ft / 2.74 m
- Mid (70 %): 8.00 ft / 2.44 m
- Quarterdeck (10 %): 8.00 ft / 2.44 m
- Stern: 8.00 ft / 2.44 m
- Average freeboard: 8.55 ft / 2.61 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): ? %
- Above water (accommodation/working, high = better): 79.7 %
Waterplane Area: 4,149 Square feet or 385 Square metres
Displacement factor (Displacement / loading): 37 %
Structure weight / hull surface area: 61 lbs/sq ft or 296 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.28
- Overall: 1.00
Hull space for machinery, storage, compartmentation is ?
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

(Historical data)

Jomalig, Filipino Escort Cruiser laid down 1930

Displacement: 7,879 t light; 8,256 t standard; 9,975 t normal; 11,350 t full load

Dimensions: Length overall / water x beam x draught

582.68 ft / 557.74 ft x 55.77 ft (Bulges 63.65 ft) x 18.04 ft (normal load) [177.60 m / 170.00 m x 17.00 m (Bulges 19.40 m) x 5.50 m]

Armament:

12 - 6.10" / 155 mm guns (4x3 guns), 120.00lbs / 54.43kg shells, 1926 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 13.00lbs / 5.90kg shells, 1926 Model Dual purpose guns in deck mounts with hoists on side ends, evenly spread
4 - 1.38" / 35.0 mm guns (2x2 guns), 1.32lbs / 0.60kg shells, 1930 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts
8 - 0.54" / 13.7 mm guns (2x4 guns), 0.11lbs / 0.05kg shells, 1925 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread, all raised mounts - superfiring
Weight of broadside 1,550 lbs / 703 kg
Shells per gun, main battery: 200

4 - 24.0" / 610 mm above water torpedoes

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 557.74 ft / 170.00 m 9.84 ft / 3.00 m
Upper: 0.98" / 25 mm 557.74 ft / 170.00 m 9.84 ft / 3.00 m
Main Belt covers 154 % of normal length

Torpedo Bulkhead and Bulges: 0.98" / 25 mm 328.08 ft / 100.00 m 16.40 ft / 5.00 m

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.18" / 30 mm 0.59" / 15 mm 0.98" / 25 mm
3rd: 0.79" / 20 mm 0.59" / 15 mm -
4th: 0.59" / 15 mm - -

Armour deck: 3.15" / 80 mm, Conning tower: 3.15" / 80 mm

Machinery:

Diesel Internal combustion generators, Electric motors, 4 shafts, 25,000 shp / 18,650 Kw = 23.10 kts
Range 13,500nm at 15.00 kts (Bunkerage = 3,094 tons)

Complement: 498 - 648

Cost: £2.243 million / $8.973 million

Distribution of weights at normal displacement:

Armament: 184 tons, 1.8 %
Armour: 3,014 tons, 30.2 %
- Belts: 1,160 tons, 11.6 %
- Torpedo bulkhead: 196 tons, 2.0 %
- Armament: 368 tons, 3.7 %
- Armour Deck: 1,259 tons, 12.6 %
- Conning Tower: 31 tons, 0.3 %
Machinery: 758 tons, 7.6 %
Hull, fittings & equipment: 3,824 tons, 38.3 %
Fuel, ammunition & stores: 2,095 tons, 21.0 %
Miscellaneous weights: 100 tons, 1.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 17,843 lbs / 8,093 Kg = 157.0 x 6.1 " / 155 mm shells or 3.4 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 3.3 ft / 1.0 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 1.63

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.545
Length to Beam Ratio: 8.76 : 1
'Natural speed' for length: 23.62 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 43
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (20 %): 18.86 ft / 5.75 m
- Mid (50 %): 16.57 ft / 5.05 m
- Quarterdeck (15 %): 16.57 ft / 5.05 m
- Stern: 16.57 ft / 5.05 m
- Average freeboard: 17.96 ft / 5.48 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 65.3 %
- Above water (accommodation/working, high = better): 124.9 %
Waterplane Area: 21,608 Square feet or 2,007 Square metres
Displacement factor (Displacement / loading): 163 %
Structure weight / hull surface area: 110 lbs/sq ft or 535 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.10
- Longitudinal: 1.24
- Overall: 1.11
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

-Main armour belt is full-length
-Full-length upper belt for splinter protection
-Catapult & hangar for 2 a/c amidships @ 75t
-Climatisation @ 15t
-Flag facilities @ 10t


Jomalig, Laid down 1930, scrapped February 1941

[Historical data]

Filipino Durnaran-class Coastal Cruiser laid down 1927

Displacement: 2,254 t light; 2,377 t standard; 2,683 t normal; 2,928 t full load

Dimensions: Length overall / water x beam x draught

365.33 ft / 357.61 ft x 39.04 ft x 16.40 ft (normal load) [111.35 m / 109.00 m x 11.90 m x 5.00 m]

Armament:

6 - 6.10" / 155 mm guns (3x2 guns), 120.00lbs / 54.43kg shells, 1926 Model Breech loading guns in turrets (on barbettes) on centreline ends, majority aft, 1 raised mount aft - superfiring
2 - 2.95" / 75.0 mm guns in single mounts, 13.00lbs / 5.90kg shells, 1926 Model Dual purpose guns in deck mounts with hoists on centreline ends, evenly spread, all raised mounts - superfiring
4 - 2.95" / 75.0 mm guns in single mounts, 13.00lbs / 5.90kg shells, 1926 Model Dual purpose guns in deck mounts with hoists on side ends, evenly spread
3 - 0.98" / 25.0 mm guns (1x3 guns), 0.57lbs / 0.26kg shells, 1925 Model Anti-aircraft guns in deck mount on centreline amidships, all raised guns
8 - 0.54" / 13.7 mm guns (4x2 guns), 0.11lbs / 0.05kg shells, 1925 Model Machine guns in deck mounts on side ends, evenly spread
Weight of broadside 801 lbs / 363 kg
Shells per gun, main battery: 150

6 - 21.0" / 533.4 mm above water torpedoes

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 291.99 ft / 89.00 m 7.55 ft / 2.30 m
Ends: Unarmoured
Main Belt covers 126 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
2nd: 1.18" / 30 mm 0.59" / 15 mm 0.79" / 20 mm
3rd: 1.18" / 30 mm - -
4th: 0.59" / 15 mm - -

Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 3 shafts, 26,182 shp / 19,532 Kw = 28.00 kts
Range 5,000nm at 15.00 kts (Bunkerage = 551 tons)

Complement: 186 - 242

Cost: £0.987 million / $3.949 million

Distribution of weights at normal displacement:

Armament: 95 tons, 3.5 %
Armour: 410 tons, 15.3 %
- Belts: 174 tons, 6.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 96 tons, 3.6 %
- Armour Deck: 126 tons, 4.7 %
- Conning Tower: 13 tons, 0.5 %
Machinery: 805 tons, 30.0 %
Hull, fittings & equipment: 929 tons, 34.6 %
Fuel, ammunition & stores: 429 tons, 16.0 %
Miscellaneous weights: 15 tons, 0.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,474 lbs / 668 Kg = 13.0 x 6.1 " / 155 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 1.3 ft / 0.4 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.94
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.410
Length to Beam Ratio: 9.16 : 1
'Natural speed' for length: 18.91 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.57 ft / 5.05 m
- Forecastle (20 %): 14.93 ft / 4.55 m
- Mid (50 %): 13.29 ft / 4.05 m
- Quarterdeck (15 %): 13.29 ft / 4.05 m
- Stern: 13.29 ft / 4.05 m
- Average freeboard: 13.99 ft / 4.27 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 125.4 %
- Above water (accommodation/working, high = better): 85.2 %
Waterplane Area: 8,646 Square feet or 803 Square metres
Displacement factor (Displacement / loading): 95 %
Structure weight / hull surface area: 59 lbs/sq ft or 290 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.67
- Longitudinal: 1.87
- Overall: 0.75
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

Durnaran – laid down 1927, paid off for scrapping 1 April 1941
Culion – laid down 1927, paid off for scrapping 1 April 1941

(Historical data)

Generale Antonio Cantore, ex-Italian Destroyer laid down 1922

Displacement: 1,524 t light; 1,579 t standard; 1,678 t normal; 1,751 t full load
Loading submergence 198 tons/feet

Dimensions: 357.61 ft x 35.76 ft x 11.48 ft (normal load) [109.00 m x 10.90 m x 3.50 m]

Armament:

8 – 100mm / 50 guns in 2 quadruple turrets
1 - 3" / 45 gun in a single mount amidships
4 - 20 mm AA cannons
Weight of broadside 259 lbs / 117 kg
4 - 21" above water torpedoes in 1 quadruple mount

Armour:

Main turrets 0.79" / 20 mm
Conning tower 2.76" / 70 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 41,000 shp / 30,586 Kw = 33.61 kts
Range 5,000nm at 10.00 kts

Complement: 131 - 170

Cost: £0.574 million / $2.295 million

Distribution of weights at normal displacement:

Armament: 32 tons, 1.9 %
Armour: 29 tons, 1.7 %
Belts: 0 tons, 0.0 %, Armament: 21 tons, 1.2 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 8 tons, 0.5 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 927 tons, 55.2 %
Hull, fittings & equipment: 515 tons, 30.7 %
Fuel, ammunition & stores: 154 tons, 9.2 %
Miscellaneous weights: 20 tons, 1.2 %

Metacentric height 1.8

Remarks:

Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.36
Shellfire needed to sink: 406 lbs / 184 Kg = 13.3 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 54 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.35
Relative quality as seaboat: 1.00

Hull form characteristics:

Block coefficient: 0.400
Sharpness coefficient: 0.30
Hull speed coefficient 'M': 9.20
'Natural speed' for length: 18.91 kts
Power going to wave formation at top speed: 67 %
Trim: 54
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 194.2 %
Relative accommodation and working space: 119.2 %
(Average = 100%)
Displacement factor: 54 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.51
(Structure weight / hull surface area: 39 lbs / square foot or 189 Kg / square metre)
Relative longitudinal hull strength: 1.28
(for 15.09 ft / 4.60 m average freeboard, freeboard adjustment 4.49 ft)
Relative composite hull strength: 0.56


Santelmo, ex Cantore – Laid down 1922, purchased 1940, Scrapped 1941
Sawimanok, ex Chinotto – Laid down 1922, purchased 1940, Scrapped 1941
Sirena, ex-Casanio – Laid down 1922, purchased 1940, Scrapped 1941
Siyokoy, ex-Pristani – Laid down 1922, purchased 1940, Scrapped 1941
Tikbalang, ex-Papa – Laid down 1922, purchased 1940, Scrapped 1941
Wakwak, ex-Montenari – Laid down 1922, purchased 1940, Scrapped 1941

(Historical data)

Balabac (Go Ni Type I-P), small troop transport ship, laid down in Japan 1925

Displacement:: 1,713 t light; 1,825 t standard; 2,228 t normal; 2,550 t full load

Dimensions: Length overall / water x beam x draught

387.03 ft / 380.00 ft x 38.00 ft x 9.00 ft (normal load) [117.97 m / 115.82 m x 11.58 m x 2.74 m]

Armament:

4 - 6.00" / 152 mm guns (2x2 guns), 110.00lbs / 49.90kg shells, 1919 Model Breech loading guns in turrets (on barbettes) on centreline, all forward, 1 raised mount - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.00lbs / 2.72kg shells, 1923 Model Dual purpose guns in deck mounts on side, all aft, all raised mounts
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1918 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts
Weight of broadside 471 lbs / 214 kg
Shells per gun, main battery: 150

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 2.00" / 51 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 6,606 shp / 4,928 Kw = 20.00 kts
Range 7,000nm at 15.00 kts (Bunkerage = 725 tons)

Complement: 16 officers and 180 men

Cost: £0.453 million / $1.810 million

Distribution of weights at normal displacement:

Armament: 58 tons, 2.6 %
Armour: 71 tons, 3.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 71 tons, 3.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 214 tons, 9.6 %
Hull, fittings & equipment: 970 tons, 43.5 %
Fuel, ammunition & stores: 515 tons, 23.1 %
Miscellaneous weights: 400 tons, 18.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 4,086 lbs / 1,853 Kg = 37.8 x 6.0 " / 152 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 1.4 ft / 0.4 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.28

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.600
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 19.49 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 11.50 ft / 3.51 m
- Forecastle (20 %): 11.50 ft / 3.51 m
- Mid (50 %): 11.50 ft / 3.51 m
- Quarterdeck (15 %): 11.50 ft / 3.51 m
- Stern: 11.50 ft / 3.51 m
- Average freeboard: 11.50 ft / 3.51 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 72.8 %
- Above water (accommodation/working, high = better): 143.7 %
Waterplane Area: 10,561 Square feet or 981 Square metres
Displacement factor (Displacement / loading): 164 %
Structure weight / hull surface area: 64 lbs/sq ft or 314 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.00
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

150 armed soldiers (normal at 2 tons)
1 scoutplane + catapult (aft) for main guns (50 tons)
Ramp + operating system (50 tons)


Balabac, laid down 1925 in Japan, Scrapped 1941

Filipino Audaz [Ariete] -class torpedo boats, laid down in Italy, 1931

Displacement: 607 t light; 627 t standard; 678 t normal; 719 t full load

Dimensions: Length overall / water x beam x draught

268.93 ft / 262.47 ft x 22.97 ft x 9.84 ft (normal load) [81.97 m / 80.00 m x 7.00 m x 3.00 m]

Armament:

2 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1930 Model Breech loading guns in deck mounts on centreline ends, evenly spread, 1 raised mount
2 - 0.79" / 20.0 mm guns (1x2 guns), 0.24lbs / 0.11kg shells, 1930 Model Anti-aircraft guns in deck mount on side
Weight of broadside 62 lbs / 28 kg
Shells per gun, main battery: 200
6 - 17.7" / 450 mm above water torpedoes

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -
3rd: 0.39" / 10 mm - -

Conning tower: 0.79" / 20 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 20,000 shp / 14,920 Kw = 32.68 kts
Range 2,000nm at 15.00 kts
Bunker at max displacement = 92 tons

Complement: 66 - 86

Cost: £0.313 million / $1.252 million

Distribution of weights at normal displacement:

Armament: 8 tons, 1.1 %
Armour: 5 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.2 %
Machinery: 337 tons, 49.7 %
Hull, fittings & equipment: 198 tons, 29.1 %
Fuel, ammunition & stores: 71 tons, 10.5 %
Miscellaneous weights: 60 tons, 8.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 161 lbs / 73 Kg = 5.3 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 0.6 ft / 0.2 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.19
Seaboat quality (Average = 1.00): 0.79

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 11.43: 1
'Natural speed' for length: 18.54 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 63
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 16.40 ft / 5.00 m
- Mid (30 %): 16.40 ft / 5.00 m (8.20 ft / 2.50 m aft of break)
- Quarterdeck (15 %): 8.20 ft / 2.50 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 10.79 ft / 3.29 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 178.8 %
- Above water (accommodation/working, high = better): 53.8 %
Waterplane Area: 3,851 Square feet or 358 Square metres
Displacement factor (Displacement / loading): 51 %
Structure weight / hull surface area: 24 lbs/sq ft or 116 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.24
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Audaz, laid down 1931 in Italy
Osado, laid down 1931 in Italy
Furor, laid down 1931 in Italy
Atrevido, laid down 1931 in Italy
Bravero, laid down 1931 in Italy
Intrépido, laid down 1931 in Italy
Guapo, laid down 1932 in Italy
Apellidar, laid down 1932 in Italy
Arrojado, laid down 1932 in Italy
Temerario, laid down 1932 in Italy
Barbaridad, laid down 1932 in Italy
Intentona, laid down 1932 in Italy

All twelve units of this class scrapped 1942

(Historical data)

Dalupiri, Filipino minelaying cruiser laid down 1928

Displacement: 4,444 t light; 4,601 t standard; 5,504 t normal; 6,227 t full load

Dimensions: Length overall / water x beam x draught

491.24 ft / 472.44 ft x 50.85 ft x 17.06 ft (normal load) [149.73 m / 144.00 m x 15.50 m x 5.20 m]

Armament:

4 - 6.10" / 155 mm guns in single mounts, 120.00lbs / 54.43kg shells, 1926 Model Quick firing guns in deck mounts with hoists on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 2.95" / 75.0 mm guns in single mounts, 13.00lbs / 5.90kg shells, 1926 Model Dual purpose guns in deck mounts with hoists on side ends, evenly spread, 2 raised mounts
2 - 1.57" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1918 Model Quick firing guns in deck mounts on side, all aft, all raised mounts
6 - 0.98" / 25.0 mm guns (2x3 guns), 0.57lbs / 0.26kg shells, 1925 Model Anti-aircraft guns in deck mounts on side, all amidships
8 - 0.54" / 13.7 mm guns (4x2 guns), 0.11lbs / 0.05kg shells, 1925 Model Machine guns in deck mounts on side ends, evenly spread, all raised mounts
Weight of broadside 540 lbs / 245 kg
Shells per gun, main battery: 150
2 - 24.0" / 610 mm above water torpedoes

Mines @ 1,000lbs each: 425
or Depth Charges @ 550lbs each: 800

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm 0.79" / 20 mm
3rd: 0.79" / 20 mm - -
4th: 0.59" / 15 mm - -

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 60,122 shp / 44,851 Kw = 31.50 kts
Range 10,000nm at 15.00 kts (Bunkerage = 1,626 tons)

Complement: 319 - 415

Cost: £1.800 million / $7.201 million

Distribution of weights at normal displacement:

Armament: 64 tons, 1.2 %
Armour: 39 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 39 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,872 tons, 34.0 %
Hull, fittings & equipment: 2,168 tons, 39.4 %
Fuel, ammunition & stores: 1,060 tons, 19.3 %
Miscellaneous weights: 300 tons, 5.5 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 4,801 lbs / 2,178 Kg = 42.3 x 6.1 " / 155 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 2.4 ft / 0.7 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:

Hull has low quarterdeck
Block coefficient: 0.470
Length to Beam Ratio: 9.29: 1
'Natural speed' for length: 21.74 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (20 %): 19.03 ft / 5.80 m
- Mid (50 %): 19.03 ft / 5.80 m
- Quarterdeck (15 %): 9.84 ft / 3.00 m (19.03 ft / 5.80 m before break)
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 18.10 ft / 5.52 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 125.3 %
- Above water (accommodation/working, high = better): 163.8 %
Waterplane Area: 15,585 Square feet or 1,448 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 83 lbs/sq ft or 403 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.87
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Misc. weight
200t - mines and/or depth-charges
50t - catapult + aircraft
25t - flag facilities
25t - climatisation


Dalupiri, laid down 1928

Paid off for disposal and scrapped July 1942

(Historical data)

Agbayani, Filipino Fast Transport/ML laid down 1934

The torpedoes are just there to illustrate the deck space occupied by the landing craft and minehandling gear/cargo area. There are no actual torpedoes involved. I should be able to haul around 300 troops for short jaunts.

Displacement: 2,753 t light; 2,853 t standard; 3,239 t normal; 3,548 t full load

Dimensions: Length overall / water x beam x draught

471.91 ft / 459.32 ft x 42.65 ft x 13.78 ft (normal load) [143.84 m / 140.00 m x 13.00 m x 4.20 m]

Armament:

6 - 4.53" / 115 mm guns (3x2 guns), 48.50lbs / 22.00kg shells, 1934 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 2 raised mounts - superfiring
12 - 1.38" / 35.0 mm guns (6x2 guns), 1.32lbs / 0.60kg shells, 1934 Model Anti-aircraft guns in deck mounts on side, evenly spread, 2 raised mounts
8 - 0.54" / 13.7 mm guns (2x4 guns), 0.11lbs / 0.05kg shells, 1934 Model Machine guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 308 lbs / 140 kg
Shells per gun, main battery: 200
10 - 24.0" / 610 mm above water torpedoes

Misc. Weight:

-100 t: 2 sets davits
-40 t: 2 large cranes (10 t capacity each)
-40 t: minelaying equipment (rails, cranes)
-200 t: 2 LCI and 100 t cargo or 200 t of cargo or 200 mines

Armour:

Belts: Width (max) Length (avg) Height (avg)
Ends: Unarmoured
Upper: 1.18" / 30 mm 65.62 ft / 20.00 m 8.01 ft / 2.44 m

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.59" / 15 mm -
2nd: 0.79" / 20 mm - -
3rd: 0.59" / 15 mm - -

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 50,000 shp / 37,300 Kw = 32.93 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 695 tons

Complement: 214 - 279

Cost: £1.577 million / $6.308 million

Distribution of weights at normal displacement:

Armament: 37 tons, 1.1 %
Armour: 54 tons, 1.7 %
- Belts: 37 tons, 1.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 16 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,385 tons, 42.8 %
Hull, fittings & equipment: 897 tons, 27.7 %
Fuel, ammunition & stores: 487 tons, 15.0 %
Miscellaneous weights: 380 tons, 11.7 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,072 lbs / 486 Kg = 23.1 x 4.5 " / 115 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.9 ft / 0.6 m
Roll period: 13.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:

Hull has rise forward of midbreak
Block coefficient: 0.420
Length to Beam Ratio: 10.77 : 1
'Natural speed' for length: 21.43 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 64
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.82 ft / 6.65 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (46 %): 19.69 ft / 6.00 m (11.81 ft / 3.60 m aft of break)
- Quarterdeck (15 %): 11.81 ft / 3.60 m
- Stern: 11.81 ft / 3.60 m
- Average freeboard: 15.60 ft / 4.76 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 160.0 %
- Above water (accommodation/working, high = better): 87.8 %
Waterplane Area: 12,213 Square feet or 1,135 Square metres
Displacement factor (Displacement / loading): 90 %
Structure weight / hull surface area: 43 lbs/sq ft or 209 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.57
- Longitudinal: 1.00
- Overall: 0.60
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform


Agbayani, Laid down 1934, completed 1935, sold Mexico 1Q42
Agpalo, Laid down 1934, completed 1935, sold Mexico 1Q42

(Historical data)

Indomito-class, ex-Italian Destroyers, laid down 1912

Length, 260 ft x Beam, 26.0 ft x Depth, 10.8 ft
834 tons normal displacement (762 tons standard)

Main battery: 3 x 75mm Model 1926 DP guns (3x1)
AA battery: 2 x 2.24-inch / 57mm (1x2)
Light battery: 2 x 0.54-inch / 13.7mm (2x1)

Weight of broadside: 46 lbs

3 TT, 18.0" (1 submerged)

Depth charges @ 550lb each: 35
or Mines @ 1,000lb each: 15

Hull unarmored

Maximum speed for 25807 shp = 32.00 knots
Approximate cruising radius, 4000 nm / 10 kts

Typical complement: 78-101


Estimated cost, $391,000 (£98,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea conditions.

Oil firing.

Poor seaboat, wet and uncomfortable; reduced performance in heavy weather.

Magazines and engineering spaces are cramped, with poor watertight subdivision.

Cramped ship; poor crew accommodation, limited working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 7 tons = 1 pct
Machinery ........................ 473 tons = 57 pct
Hull and fittings; equipment ..... 251 tons = 30 pct
Fuel, ammunition, stores ......... 93 tons = 11 pct
Miscellaneous weights ............ 10 tons = 1 pct
-----
834 tons = 100 pct

Estimated metacentric height, 1.1 ft

Displacement summary:

Light ship: 741 tons
Standard displacement: 762 tons
Normal service: 834 tons
Full load: 889 tons

Loading submergence 105 tons/foot

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.33

Shellfire needed to sink: 197 lbs = 14.6 x 3.0-inch shells
(Approximates weight of penetrating shell hits needed to sink ship, not counting critical hits)

Torpedoes needed to sink: 0.2
(Approximates number of 'typical' torpedo hits needed to sink ship)

Relative steadiness as gun platform, 50 percent (50 percent is 'average')

Relative rocking effect from firing to beam, 0.09

Relative quality as a seaboat: 0.79

Hull form characteristics:

Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 8.44
'Natural speed' for length = 16.1 knots
Power going to wave formation at top speed: 71 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by magazines and engineering spaces: 200 percent

Relative accommodation and working space: 89 percent

Displacement factor: 39 percent (Displacement relative to loading factors)

Relative cross-sectional hull strength: 0.59 (Structure weight per square foot of hull surface: 33 lbs)

Relative longitudinal hull strength: 1.87 (for 11.68 ft average freeboard; freeboard adjustment +2.48 ft)

Relative composite hull strength: 0.66


Indomito – laid down 1912, refit 1925; scrapped 1942
Impavido – laid down 1912, refit 1925; scrapped 1942
Insidioso – laid down 1912, refit 1925; scrapped 1942
Irrequieto – laid down 1912, refit 1925; scrapped 1942

(Historical data)

Filipino Dagupan-class Coast Defense Battleship, laid down 1925

Displacement: 7,568 t light; 7,995 t standard; 8,672 t normal; 9,213 t full load

Dimensions: Length overall / water x beam x draught

417.29 ft / 408.00 ft x 63.50 ft x 21.30 ft (normal load) [127.19 m / 124.36 m x 19.35 m x 6.49 m]

Armament:

4 - 12.00" / 305 mm, 55-cal guns (2x2 guns), 925.00lbs / 419.57kg shells, 1925 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread
4 - 5.12" / 130 mm, 50-cal guns (2x2 guns), 70.00lbs / 31.75kg shells, 1925 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, all raised mounts - superfiring
6 - 5.12" / 130 mm, 50-cal guns in single mounts, 70.00lbs / 31.75kg shells, 1925 Model Breech loading guns in turrets (on barbettes) on side, all amidships
8 - 1.57" / 40.0 mm, 2-pdr guns (6 mounts), 1.95lbs / 0.88kg shells, 1918 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
8 - 0.98" / 25.0 mm guns (6 mounts), 0.57lbs / 0.26kg shells, 1925 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 4,419 lbs / 2,005 kg
Shells per gun, main battery: 100

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 10.0" / 254 mm 190.00 ft / 57.91 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 72 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 5.91" / 150 mm 10.0" / 254 mm
2nd: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
3rd: 1.57" / 40 mm 0.54" / 14 mm 0.79" / 20 mm
4th: 0.79" / 20 mm - -
5th: 0.54" / 14 mm - -

Armour deck: 3.50" / 89 mm, Conning tower: 2.50" / 64 mm

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 20,600 shp / 15,368 Kw = 21.75 kts
Range 13,700nm at 10.00 kts (Bunkerage = 1,218 tons)

Complement: 31 officers and 486 men

Cost: £2.598 million / $10.392 million

Distribution of weights at normal displacement:

Armament: 518 tons, 6.0 %
Armour: 2,855 tons, 32.9 %
- Belts: 900 tons, 10.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 762 tons, 8.8 %
- Armour Deck: 1,171 tons, 13.5 %
- Conning Tower: 23 tons, 0.3 %
Machinery: 669 tons, 7.7 %
Hull, fittings & equipment: 3,525 tons, 40.7 %
Fuel, ammunition & stores: 1,104 tons, 12.7 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 12,063 lbs / 5,472 Kg = 13.0 x 12.0 " / 305 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 2.8 ft / 0.9 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.84
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 6.43 : 1
'Natural speed' for length: 20.20 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.91 ft / 4.85 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 70.5 %
- Above water (accommodation/working, high = better): 116.8 %
Waterplane Area: 18,081 Square feet or 1,680 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 131 lbs/sq ft or 642 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.36
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily


Dagupan (ex-Panabo) – laid down 1925 – scrapped 1942
Tacloban – laid down 1926 – scrapped 1942

(Historical data)

Itbayat (Go Ni Type II-P)-class, Philippines Medium Troop Transport Ship laid down 1928

Displacement:: 3,303 t light; 3,439 t standard; 4,069 t normal; 4,557 t full load

Dimensions: Length overall / water x beam x draught

449.92 ft / 430.00 ft x 46.00 ft x 12.00 ft (normal load) [137.14 m / 131.06 m x 14.02 m x 3.66 m]

Armament:

4 - 6.00" / 152 mm guns (2x2 guns), 105.00lbs / 48.99kg shells, 1901 Model (Mk VI) Breech loading guns in turrets (on barbettes) on centreline, all forward, 1 raised mount - superfiring
8 - 2.95" / 75.0 mm guns in single mounts, 13.00lbs / 5.90kg shells, 1926 Model Quick firing guns in turrets (on barbettes) on side, all forward, 6 raised mounts - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.00lbs / 2.72kg shells, 1923 Model Dual purpose guns in deck mounts with hoists on side, all amidships, all raised mounts - superfiring
8 - 1.57" / 40.0 mm guns (4x2 guns), 2.00lbs / 0.91kg shells, 1918 Model Anti-aircraft guns in deck mounts on side, evenly spread, 2 raised mounts
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.50lbs / 0.23kg shells, 1925 Model Machine guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 582 lbs / 264 kg
Shells per gun, main battery: 150

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 151.00 ft / 46.02 m 8.50 ft / 2.59 m
Ends: Unarmoured
Upper: 1.00" / 25 mm 151.00 ft / 46.02 m 10.00 ft / 3.05 m
Main Belt covers 54 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
5th: 1.00" / 25 mm - -

Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 9,212 shp / 6,872 Kw = 20.00 kts
Range 8,000nm at 15.00 kts (Bunkerage = 1,134 tons)

Complement: 254 - 331

Cost: £0.829 million / $3.316 million

Distribution of weights at normal displacement:

Armament: 73 tons, 1.8 %
Armour: 830 tons, 20.4 %
- Belts: 437 tons, 10.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 115 tons, 2.8 %
- Armour Deck: 262 tons, 6.4 %
- Conning Tower: 16 tons, 0.4 %
Machinery: 287 tons, 7.0 %
Hull, fittings & equipment: 1,514 tons, 37.2 %
Fuel, ammunition & stores: 765 tons, 18.8 %
Miscellaneous weights: 600 tons, 14.7 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 9,577 lbs / 4,355 Kg = 91.2 x 6.0 " / 152 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 2.0 ft / 0.6 m
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.600
Length to Beam Ratio: 9.35: 1
'Natural speed' for length: 20.74 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 50.50 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.95 ft / 4.25 m
- Forecastle (20 %): 13.95 ft / 4.25 m
- Mid (50 %): 13.95 ft / 4.25 m
- Quarterdeck (15 %): 13.95 ft / 4.25 m
- Stern: 13.95 ft / 4.25 m
- Average freeboard: 13.95 ft / 4.25 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 54.0 %
- Above water (accommodation/working, high = better): 148.0 %
Waterplane Area: 14,151 Square feet or 1,315 Square metres
Displacement factor (Displacement / loading): 157 %
Structure weight / hull surface area: 72 lbs/sq ft or 354 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.10
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

50.5-degree bow angle was used to 'sim' part of the lifting system hanging over the bow to get the correct overall length.

250 armed soldiers at 2 tons = 500 tons
1 scoutplane + catapult (25+25 = 50 tons)
Landing ramp + ramp lifting system forward (50 tons)


Itbayat, laid down 1928 in Japan, scrapped 1942
Y'Ami, laid down 1928 in Japan, scrapped 1942