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(Historical data)

Filipino Basilan class heavy cruiser, laid down 1933

Displacement: 12,890 t light; 13,545 t standard; 15,606 t normal; 17,255 t full load

Dimensions: Length overall / water x beam x draught

699.46 ft / 682.41 ft x 68.24 ft x 23.46 ft (normal load) [213.20 m / 208.00 m x 20.80 m x 7.15 m]

Armament:

12 - 8.27" / 210 mm guns (4x3 guns), 300.00lbs / 136.08kg shells, 1928 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 4.53" / 115 mm guns (4x2 guns), 48.50lbs / 22.00kg shells, 1931 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, 1933 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread, all raised mounts - superfiring
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.32lbs / 0.60kg shells, 1933 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts
16 - 0.54" / 13.7 mm guns (4x4 guns), 0.11lbs / 0.05kg shells, 1933 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 4,006 lbs / 1,817 kg
Shells per gun, main battery: 150

6 - 24.0" / 610 mm above water torpedoes

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 426.51 ft / 130.00 m 10.66 ft / 3.25 m
Ends: Unarmoured
Main Belt covers 96 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 6.30" / 160 mm 4.72" / 120 mm 5.91" / 150 mm
2nd: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
3rd: 0.79" / 20 mm - -
4th: 0.79" / 20 mm - -
5th: 0.59" / 15 mm - -

Armour deck: 2.36" / 60 mm, Conning tower: 3.15" / 80 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 92,500 shp / 69,005 Kw = 32.03 kts
Range 13,250nm at 15.00 kts (Bunkerage = 3,710 tons)

Complement: 697 - 907

Cost: £5.792 million / $23.169 million

Distribution of weights at normal displacement:

Armament: 472 tons, 3.0 %
Armour: 3,438 tons, 22.0 %
- Belts: 1,124 tons, 7.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 861 tons, 5.5 %
- Armour Deck: 1,410 tons, 9.0 %
- Conning Tower: 42 tons, 0.3 %
Machinery: 2,695 tons, 17.3 %
Hull, fittings & equipment: 6,160 tons, 39.5 %
Fuel, ammunition & stores: 2,715 tons, 17.4 %
Miscellaneous weights: 125 tons, 0.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 20,002 lbs / 9,073 Kg = 70.8 x 8.3 " / 210 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 2.9 ft / 0.9 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.74
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 29.81 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (20 %): 20.51 ft / 6.25 m
- Mid (50 %): 17.22 ft / 5.25 m
- Quarterdeck (20 %): 17.22 ft / 5.25 m
- Stern: 17.22 ft / 5.25 m
- Average freeboard: 19.09 ft / 5.82 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 81.0 %
- Above water (accommodation/working, high = better): 140.6 %
Waterplane Area: 32,266 Square feet or 2,998 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 127 lbs/sq ft or 619 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.11
- 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

75t...catapult+2 aircraft
25t...flag facilities
25t...acclimatization


Basilan – laid down 1933
Negros – laid down 1933
Cebu – laid down 1934 (best estimate)
Luzon – laid down 1935 (best estimate)


Refitted in 1943 according to the following scheme:

Basilan, Philippine Heavy Cruiser laid down 1933 – Refitted 1943

Displacement: 12,891 t light; 13,545 t standard; 15,606 t normal; 17,255 t full load

Dimensions: Length overall / water x beam x draught

699.46 ft / 682.41 ft x 68.24 ft x 23.46 ft (normal load) [213.20 m / 208.00 m x 20.80 m x 7.15 m]

Armament:

12 - 8.27" / 210 mm guns (4x3 guns), 300.00lbs / 136.08kg shells, 1928 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 4.53" / 115 mm guns (4x2 guns), 48.50lbs / 22.00kg shells, 1931 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, 1933 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread, all raised mounts
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.32lbs / 0.60kg shells, 1933 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 4,004 lbs / 1,816 kg
Shells per gun, main battery: 150
6 - 24.0" / 610 mm above water torpedoes

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 426.51 ft / 130.00 m 10.66 ft / 3.25 m
Ends: Unarmoured
Main Belt covers 96 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.30" / 160 mm 4.72" / 120 mm 5.91" / 150 mm
2nd: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
3rd: 0.79" / 20 mm - -
4th: 0.79" / 20 mm - -

Armour deck: 2.36" / 60 mm, Conning tower: 3.15" / 80 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 92,534 shp / 69,030 Kw = 32.03 kts
Range 13,250nm at 15.00 kts
Bunker at max displacement = 3,710 tons

Complement: 697 - 907

Cost: £5.792 million / $23.170 million

Distribution of weights at normal displacement:

Armament: 472 tons, 3.0 %
Armour: 3,438 tons, 22.0 %
- Belts: 1,124 tons, 7.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 861 tons, 5.5 %
- Armour Deck: 1,410 tons, 9.0 %
- Conning Tower: 42 tons, 0.3 %
Machinery: 2,696 tons, 17.3 %
Hull, fittings & equipment: 6,155 tons, 39.4 %
Fuel, ammunition & stores: 2,715 tons, 17.4 %
Miscellaneous weights: 130 tons, 0.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 19,974 lbs / 9,060 Kg = 70.7 x 8.3 " / 210 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 2.9 ft / 0.9 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.74
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 29.81 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (20 %): 20.51 ft / 6.25 m
- Mid (50 %): 17.22 ft / 5.25 m
- Quarterdeck (20 %): 17.22 ft / 5.25 m
- Stern: 17.22 ft / 5.25 m
- Average freeboard: 19.09 ft / 5.82 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 81.1 %
- Above water (accommodation/working, high = better): 140.6 %
Waterplane Area: 32,266 Square feet or 2,998 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 127 lbs/sq ft or 619 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.11
- 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

Breakdown of miscellaneous weight

Aircraft facilities - catapult and two aircraft - 75 tons
Dradis - 30 tons
Tropical acclimatization - 25 tons

Summary of Refit (Minor - 15%)

Remove 13.7mm machinegun batteries; add Dradis (radar) at expense of flag accommodation; revise directors to conform to Dradis installation

Cost of refit - 1,843 tons
Time for refit - 95 days


Basilan – Refit commenced 1 January 1943, refit completed 6 April 1943
Negros – Refit commenced 1 January 1943, refit completed 6 April 1943
Cebu –Refit commenced 1 July 1943, refit completed 4 October 1943
Luzon - Refit commenced 1 July 1943, refit completed 4 October 1943

Leyte, Philippine Heavy Cruiser laid down 1949

Displacement: 13,090 t light; 13,788 t standard; 15,600 t normal; 17,050 t full load

Dimensions: Length overall / water x beam x draught

681.06 ft / 669.29 ft x 72.18 ft x 22.47 ft (normal load) [207.59 m / 204.00 m x 22.00 m x 6.85 m]

Armament:

9 - 8.27" / 210 mm guns (3x3 guns), 282.57lbs / 128.17kg shells, 1949 Model Breech loading guns in turrets (on barbettes) on centerline ends, majority forward, 1 raised mount - superfiring
2 - 5.12" / 130 mm guns (1x2 guns), 67.03lbs / 30.40kg shells, 1949 Model Dual purpose guns in a deck mount with hoist on centerline aft
12 - 5.12" / 130 mm guns (6x2 guns), 67.03lbs / 30.40kg shells, 1949 Model Dual purpose guns in deck mounts with hoists on side, all amidships
24 - 2.24" / 57.0 mm guns (12x2 guns), 5.65lbs / 2.56kg shells, 1949 Model Anti-aircraft guns in deck mounts on side, evenly spread, 6 raised mounts
Weight of broadside 3,617 lbs / 1,641 kg
Shells per gun, main battery: 180
8 - 24.0" / 610 mm above water torpedoes

Armor:

Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 426.51 ft / 130.00 m 13.12 ft / 4.00 m
Ends: 1.18" / 30 mm 241.14 ft / 73.50 m 13.12 ft / 4.00 m
1.64 ft / 0.50 m Unarmored ends
Main Belt covers 98 % of normal length

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.87" / 200 mm 3.15" / 80 mm 5.91" / 150 mm
2nd: 0.98" / 25 mm 0.98" / 25 mm 0.98" / 25 mm
3rd: 0.98" / 25 mm 0.98" / 25 mm 0.98" / 25 mm
4th: 0.59" / 15 mm 0.39" / 10 mm -

Armor deck: 2.36" / 60 mm, Conning tower: 3.94" / 100 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 93,136 shp / 69,480 Kw = 32.00 kts
Range 9,000nm at 18.00 kts
Bunker at max displacement = 3,262 tons

Complement: 697 - 907

Cost: £8.806 million / $35.225 million

Distribution of weights at normal displacement:

Armament: 452 tons, 2.9 %
Armor: 3,762 tons, 24.1 %
- Belts: 1,528 tons, 9.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 715 tons, 4.6 %
- Armor Deck: 1,467 tons, 9.4 %
- Conning Tower: 53 tons, 0.3 %
Machinery: 2,252 tons, 14.4 %
Hull, fittings & equipment: 6,423 tons, 41.2 %
Fuel, ammunition & stores: 2,510 tons, 16.1 %
Miscellaneous weights: 200 tons, 1.3 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 26,005 lbs / 11,796 Kg = 92.0 x 8.3 " / 210 mm shells or 2.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.6 ft / 1.1 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.19

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.503
Length to Beam Ratio: 9.27: 1
'Natural speed' for length: 29.69 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.17 ft / 9.50 m
- Forecastle (20 %): 25.43 ft / 7.75 m
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (15 %): 19.69 ft / 6.00 m
- Stern: 20.51 ft / 6.25 m
- Average freeboard: 22.22 ft / 6.77 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 71.9 %
- Above water (accommodation/working, high = better): 163.9 %
Waterplane Area: 33,563 Square feet or 3,118 Square meters
Displacement factor (Displacement / loading): 129 %
Structure weight / hull surface area: 127 lbs/sq ft or 621 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.36
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent

Leyte – Laid down 1 July 1949
Samar – Laid down 1 July 1949