WesWorld

Repository for data pertaining to destroyers and destroyer escort type vessels.

(Historical data)

Filipino Piquero-class destroyer, laid down 1931

Displacement: 1,556 t light; 1,633 t standard; 1,793 t normal; 1,920 t full load

Dimensions: Length overall / water x beam x draught

365.92 ft / 352.69 ft x 35.27 ft x 12.30 ft (normal load) [111.53 m / 107.50 m x 10.75 m x 3.75 m]

Armament:

6 - 4.53" / 115 mm guns (3x2 guns), 48.50lbs / 22.00kg shells, 1931 Model Quick firing guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.38" / 35.0 mm guns (1x2 guns), 1.32lbs / 0.60kg shells, 1931 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns - superfiring
8 - 0.54" / 13.7 mm guns (2x4 guns), 0.11lbs / 0.05kg shells, 1925 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts
4 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1925 Model Machine guns in deck mounts on side ends, evenly spread
Weight of broadside 295 lbs / 134 kg
Shells per gun, main battery: 250
8 - 24.0" / 610 mm above water torpedoes

Depth charges @ 550lb each: 50
or Mines @ 1,000lb each: 30 (2 rails)

Armour:

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, 36,500 shp / 27,229 Kw = 33.71 kts
Range 6,000nm at 12.00 kts (Bunkerage = 287 tons)

Complement: 137 - 179

Cost: £0.902 million / $3.609 million

Distribution of weights at normal displacement:

Armament: 35 tons, 2.0 %
Armour: 15 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 15 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 876 tons, 48.9 %
Hull, fittings & equipment: 585 tons, 32.6 %
Fuel, ammunition & stores: 237 tons, 13.2 %
Miscellaneous weights: 45 tons, 2.5 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 522 lbs / 237 Kg = 11.3 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.3 ft / 0.4 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.61
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.410
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 21.69 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 69
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: 21.33 ft / 6.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (57 %): 18.86 ft / 5.75 m (10.66 ft / 3.25 m aft of break)
- Quarterdeck (15 %): 10.66 ft / 3.25 m
- Stern: 10.66 ft / 3.25 m
- Average freeboard: 15.78 ft / 4.81 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 176.7 %
- Above water (accommodation/working, high = better): 72.7 %
Waterplane Area: 7,996 Square feet or 743 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 37 lbs/sq ft or 180 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
Ship has slow, easy roll, a good, steady gun platform

Misc weight

37t = depth charges/mines
8t = climatisation


Piquero – laid down 1931
Garceta – laid down 1931
Flamenco – laid down 1931
Serreta – laid down 1931
Aguilucho – laid down 1931
Busardo – laid down 1932
Polluela – laid down 1932
Calamón – laid down 1932
Grulla – laid down 1932
Avoceta – laid down 1933
Pluvial – laid down 1933
Pardela – laid down 1933

Refitted 1945 as follows:

Piquero, Philippine Destroyer laid down 1931

Displacement: 1,569 t light; 1,633 t standard; 1,793 t normal; 1,920 t full load

Dimensions: Length overall / water x beam x draught

365.92 ft / 352.69 ft x 35.27 ft x 12.30 ft (normal load) [111.53 m / 107.50 m x 10.75 m x 3.75 m]

Armament:

4 - 4.53" / 115 mm guns (2x2 guns), 46.40lbs / 21.05kg shells, 1944 Model Dual purpose guns in deck mounts with hoists on centreline ends, evenly spread
8 - 1.38" / 35.0 mm guns (2x4 guns), 1.31lbs / 0.59kg shells, 1944 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread, all raised mounts
2 - 0.54" / 13.7 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1925 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 196 lbs / 89 kg
Shells per gun, main battery: 250
4 - 24.0" / 610 mm above water torpedoes

Armour:
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.59" / 15 mm - -
3rd: 0.39" / 10 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 36,484 shp / 27,217 Kw = 33.71 kts
Range 6,000nm at 12.00 kts
Bunker at max displacement = 287 tons

Complement: 137 - 179

Cost: £0.874 million / $3.497 million

Distribution of weights at normal displacement:

Armament: 25 tons, 1.4 %
Armour: 13 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 892 tons, 49.7 %
Hull, fittings & equipment: 575 tons, 32.1 %
Fuel, ammunition & stores: 224 tons, 12.5 %
Miscellaneous weights: 65 tons, 3.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 559 lbs / 253 Kg = 12.0 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.410
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 21.69 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 69
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: 21.33 ft / 6.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (57 %): 18.86 ft / 5.75 m (10.66 ft / 3.25 m aft of break)
- Quarterdeck (15 %): 10.66 ft / 3.25 m
- Stern: 10.66 ft / 3.25 m
- Average freeboard: 15.78 ft / 4.81 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 175.7 %
- Above water (accommodation/working, high = better): 122.9 %
Waterplane Area: 7,996 Square feet or 743 Square metres
Displacement factor (Displacement / loading): 73 %
Structure weight / hull surface area: 36 lbs/sq ft or 178 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 2.31
- Overall: 0.60
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

Breakdown of Miscellaneous weight:

Radar - 20 tons
Sonar - 20 tons
A/S outfit - four A/S mortars and two D/C racks - 25 tons

Level 3 Refit - 15%

Upgrade armament outfit - 115mm DP vice QF, modernize and expand 35mm battery, reduce 13.7mm machineguns (one retained on each bridge wing for local defense), reduce torpedo tubes
Add radar, add sonar
Remove mine rails and add A/S outfit
Provide armor protection for conning tower
Service life extension.

Cost: 235 tons

Time to execute: 48 days


Piquero - Refit commenced 9 June 1945, Refit completed 27 July 1945
Garceta - Refit commenced 10 August 1945, Refit completed 27 September 1945
Flamenco - Refit commenced 9 September 1945; Refit completed 27 October 1945
Aguilucho - Refit commenced 9 September 1945; Refit completed 27 October 1945
Pollueta - Refit commenced 11 October 1945; Refit complete 28 November 1945
Serreta - Refit commenced 10 November 1945; Refit complete 28 December 1945
Busardo - Refit commenced 10 November 1945; Refit complete 28 December 1945
Calamón - Refit commenced 12 December 1945; Refit complete 29 January 1946
Grulla - Refit commenced 11 January 1946; Refit complete 28 February 1946
Avoceta - Refit commenced 11 January 1946; Refit complete 28 February 1946
Pardela - Refit commenced 1 July 1946; Refit complete 18 August 1946
Pluvial - Refit commenced 1 October 1946; Refit complete 18 November 1946

(Historical data)

Aguila, Philippines Destroyer laid down 1938

Displacement: 1,581 t light; 1,660 t standard; 1,870 t normal; 2,038 t full load

Dimensions: Length overall / water x beam x draught

381.44 ft / 367.45 ft x 33.46 ft x 14.01 ft (normal load) [116.26 m / 112.00 m x 10.20 m x 4.27 m]

Armament:

6 - 4.53" / 115 mm guns (3x2 guns), 46.40lbs / 21.05kg shells, 1938 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
8 - 1.38" / 35.0 mm guns (2x4 guns), 1.31lbs / 0.59kg shells, 1938 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
18 - 0.54" / 13.7 mm guns (6x3 guns), 0.08lbs / 0.04kg shells, 1938 Model Machine guns in deck mounts on side, evenly spread, 2 raised mounts
Weight of broadside 290 lbs / 132 kg
Shells per gun, main battery: 250
8 - 24.0" / 610 mm above water torpedoes

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.98" / 25 mm 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 37,221 shp / 27,767 Kw = 34.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 378 tons

Complement: 141 - 184

Cost: £1.167 million / $4.667 million

Distribution of weights at normal displacement:

Armament: 36 tons, 1.9 %
Armour: 24 tons, 1.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 866 tons, 46.3 %
Hull, fittings & equipment: 580 tons, 31.0 %
Fuel, ammunition & stores: 289 tons, 15.5 %
Miscellaneous weights: 75 tons, 4.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
552 lbs / 250 Kg = 11.9 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.380
Length to Beam Ratio: 10.98: 1
'Natural speed' for length: 22.07 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 48
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: 22.97 ft / 7.00 m
- Forecastle (20 %): 14.01 ft / 4.27 m
- Mid (50 %): 14.01 ft / 4.27 m
- Quarterdeck (15 %): 14.01 ft / 4.27 m
- Stern: 14.01 ft / 4.27 m
- Average freeboard: 14.73 ft / 4.49 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 169.7 %
- Above water (accommodation/working, high = better): 60.9 %
Waterplane Area: 7,779 Square feet or 723 Square metres
Displacement factor (Displacement / loading): 77 %
Structure weight / hull surface area: 37 lbs/sq ft or 179 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.93
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

Breakdown of miscellaneous weight

Provision for mine rails and mines: 40 tons
Provision for radar (when available): 25 tons
Provision for sonar (when available): 10 tons


Aguila – Laid down 1938
Alcatraz – Laid down 1938
Zampullin – Laid down 1938
Rabijunco – Laid down 1938
Ajo – Laid down 1938
Cardo – Laid down 1938
Zorzal – Laid down 1938
Mirlo – Laid down 1939
Buitron – Laid down 1939
Pagalo – Laid down 1940, Completed 14 Nov 1940
Gavion – Laid down 1940, Completed 14 Nov 1940
Colimbo – Laid down 1 Jan 1941; Launched 9 May 1941; Completed 15 November 1941

-----
Refit Scheme

Aguila, Philippine Destroyer laid down 1938

Displacement: 1,581 t light; 1,660 t standard; 1,870 t normal; 2,038 t full load

Dimensions: Length overall / water x beam x draught

392.17 ft / 367.45 ft x 33.46 ft x 14.01 ft (normal load) [119.53 m / 112.00 m x 10.20 m x 4.27 m]

Armament:

6 - 4.53" / 115 mm guns (3x2 guns), 46.40lbs / 21.05kg shells, 1938 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
8 - 1.38" / 35.0 mm guns (2x4 guns), 1.31lbs / 0.59kg shells, 1938 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
6 - 0.54" / 13.7 mm guns (2x3 guns), 0.08lbs / 0.04kg shells, 1938 Model Breech loading guns in deck mounts on side, evenly spread
Weight of broadside 289 lbs / 131 kg
Shells per gun, main battery: 250
4 - 24.0" / 610 mm above water torpedoes

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm

Conning tower: 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 37,216 shp / 27,763 Kw = 34.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 378 tons

Complement: 141 - 184

Cost: £1.169 million / $4.678 million

Distribution of weights at normal displacement:

Armament: 36 tons, 1.9 %
Armour: 17 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 870 tons, 46.5 %
Hull, fittings & equipment: 594 tons, 31.8 %
Fuel, ammunition & stores: 289 tons, 15.4 %
Miscellaneous weights: 65 tons, 3.5 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 585 lbs / 265 Kg = 12.6 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.380
Length to Beam Ratio: 10.98 : 1
'Natural speed' for length: 22.07 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 48
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 14.01 ft / 4.27 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 14.01 ft / 4.27 m
- Mid (50 %): 14.01 ft / 4.27 m
- Quarterdeck (15 %): 14.01 ft / 4.27 m
- Stern: 14.01 ft / 4.27 m
- Average freeboard: 14.73 ft / 4.49 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 169.8 %
- Above water (accommodation/working, high = better): 104.1 %
Waterplane Area: 7,779 Square feet or 723 Square metres
Displacement factor (Displacement / loading): 78 %
Structure weight / hull surface area: 37 lbs/sq ft or 183 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 2.02
- Overall: 0.60
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

Breakdown of Miscellaneous weight:

Radar - 20 tons
Sonar - 20 tons
A/S outfit - four A/S mortars and two D/C racks - 25 tons

Refit Summary:

Level 3 Refit

Add Sonar
Add Radar
Modify armor of deck mounted guns
Modify conning tower armor
Reduce number of guns in tertiary battery
Changes to torpedo carriages, mine rails and depth charge racks/throwers
Refurbishment of internal fittings for life-extension purposes

Cost - 237 tons

Time to Execute - 48 days

Aguila - Refit Commenced 1 October 1944, Refit Completed 18 November 1944
Alcatraz - Refit Commenced 3 December 1944, Refit Completed 20 January 1945
Ajo - Refit Commenced 1 January 1945, Refit Completed 18 February 1945
Zorzal - Refit Commenced 1 January 1945, Refit Completed 18 February 1945
Zampulin - Refit Commenced 4 February 1945, Refit Completed 24 March 1945
Cardo - Refit Commenced 5 March 1945, Refit Completed 22 April 1945
Mirlo - Refit Commenced 5 March 1945, Refit Completed 22 April 1945
Rabijunco - Refit Commenced 8 April 1945, Refit Completed 26 May 1945
Gavion - Refit Commenced 7 May 1945, Refit Completed 24 June 1945
Buitron - Refit Commenced 7 May 1945, Refit Completed 24 June 1945
Colimbo - Refit Commenced 9 July 1945, Refit Completed 26 August 1945
Pagalo - Refit Commenced 9 July1945, Refit Completed 26 August 1945

Pinatubo class - Rev A, Philippine Destroyer laid down 1941

Displacement: 1,890 t light; 2,001 t standard; 2,225 t normal; 2,404 t full load

Dimensions: Length overall / water x beam x draught

392.22 ft / 380.58 ft x 38.06 ft x 12.80 ft (normal load) [119.55 m / 116.00 m x 11.60 m x 3.90 m]

Armament:

6 - 4.53" / 115 mm guns (3x2 guns), 46.40lbs / 21.05kg shells, 1941 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.38" / 35.0 mm guns (1x2 guns), 1.31lbs / 0.59kg shells, 1941 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns - superfiring
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1941 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 292 lbs / 132 kg
Shells per gun, main battery: 400
8 - 24.0" / 610 mm above water torpedoes

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 37,167 shp / 27,727 Kw = 33.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 403 tons

Complement: 161 - 210

Cost: £1.418 million / $5.672 million

Distribution of weights at normal displacement:

Armament: 36 tons, 1.6 %
Armour: 18 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 15 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 947 tons, 42.6 %
Hull, fittings & equipment: 787 tons, 35.4 %
Fuel, ammunition & stores: 335 tons, 15.1 %
Miscellaneous weights: 100 tons, 4.5 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 955 lbs / 433 Kg = 20.6 x 4.5 " / 115 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.5 ft / 0.5 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 78 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.31

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 22.50 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (50 %): 21.00 ft / 6.40 m (14.44 ft / 4.40 m aft of break)
- Quarterdeck (15 %): 14.44 ft / 4.40 m
- Stern: 14.44 ft / 4.40 m
- Average freeboard: 17.87 ft / 5.45 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 157.2 %
- Above water (accommodation/working, high = better): 97.3 %
Waterplane Area: 9,376 Square feet or 871 Square metres
Displacement factor (Displacement / loading): 94 %
Structure weight / hull surface area: 41 lbs/sq ft or 201 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.54
- Longitudinal: 2.77
- Overall: 0.64
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
Good seaboat, rides out heavy weather easily

Breakdown of miscellaneous Weight

Reserved for radar and other electronics - 15 tons
Sonar and other submarine detection equipment - 25 tons
Antisubmarine armament - two depth charge racks for 48 DC and four K-guns - 30 tons
Tropicalization - 30 tons


Pinatubo – Laid down 1 April 1941; Launched 10 August 1941; Completed 22 February 1942
Arayat – Laid down 1 April 1941; Launched 10 August 1941; Completed 22 February 1942
Mariveles – Laid down 1 July 1941; Launched 9 November 1941; Completed 24 May 1942
Masaraga – Laid down 1 July 1941; Launched 9 November 1941; Completed 24 May 1942
Iraya – Laid down 1 October 1941; Launched 9 February 1942; Completed 24 August 1942
Sembrano – Laid down 1 October 1941; Launched 9 February 1942; Completed 24 August 1942
Talinis - Laid down 1 January 1942; Launched 12 May 1942; Completed 24 November 1942
Amorong - Laid down 1 January 1942; Launched 12 May 1942; Completed 24 November 1942
Balatukan - Laid down 1 April 1942; Launched 10 August 1942; Completed 22 February 1943
Kabuyao - Laid down 1 April 1942; Launched 10 August 1942; Completed 22 February 1943
Mahagno - Laid down 1 July 1942; Launched 9 November 1942; Completed 24 May 1943
Melibengoy - Laid down 1 July 1942; Launched 9 November 1942; Completed 24 May 1943
Banahaw - Laid down 1 October 1942; Launched 9 February 1943; Completed 24 August 1943
Bulusan - Laid down 1 October 1942; Launched 9 February 1943; Completed 24 August 1943
Kalatungan - Laid down 1 January 1943; Launched 12 May 1943; Completed 24 November 1943
Malepunyo - Laid down 1 January 1943; Launched 12 May 1943; Completed 24 November 1943

Improved Pinatubo class, Philippine Destroyer laid down 1943

Displacement: 2,100 t light; 2,221 t standard; 2,552 t normal; 2,817 t full load

Dimensions: Length overall / water x beam x draught

401.76 ft / 393.70 ft x 39.37 ft x 12.80 ft (normal load) [122.46 m / 120.00 m x 12.00 m x 3.90 m]

Armament:

6 - 5.12" / 130 mm guns (3x2 guns), 67.03lbs / 30.40kg shells, 1943 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.38" / 35.0 mm guns (1x2 guns), 1.31lbs / 0.59kg shells, 1941 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns - superfiring
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1941 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 415 lbs / 188 kg
Shells per gun, main battery: 300
8 - 24.0" / 610 mm above water torpedoes

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.59" / 15 mm
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 40,731 shp / 30,385 Kw = 33.00 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 595 tons

Complement: 179 - 233

Cost: £1.720 million / $6.879 million

Distribution of weights at normal displacement:

Armament: 52 tons, 2.0 %
Armour: 21 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 1,040 tons, 40.8 %
Hull, fittings & equipment: 916 tons, 35.9 %
Fuel, ammunition & stores: 453 tons, 17.7 %
Miscellaneous weights: 70 tons, 2.7 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,200 lbs / 545 Kg = 17.9 x 5.1 " / 130 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.7 ft / 0.5 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.14

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 22.78 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 61
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.15 ft / 6.75 m
- Forecastle (20 %): 19.19 ft / 5.85 m
- Mid (50 %): 15.91 ft / 4.85 m
- Quarterdeck (15 %): 15.91 ft / 4.85 m
- Stern: 15.91 ft / 4.85 m
- Average freeboard: 17.30 ft / 5.27 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 152.0 %
- Above water (accommodation/working, high = better): 97.5 %
Waterplane Area: 10,273 Square feet or 954 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 47 lbs/sq ft or 229 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.60
- Longitudinal: 2.28
- Overall: 0.68
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

Breakdown of miscellaneous Weight

Reserved for radar and other electronics - 40 tons
Tropicalization - 30 tons


Catanauan - Laid down 1 April 1943; Launched 12 August 1943; Completed 28 February 1944
Calasiao -– Laid down 1 April 1943; Launched 12 August 1943; Completed 28 February 1944
Mansalay - Laid down 1 July 1943; Launched 11 November 1943; Completed 29 May 1944
Mondragon - Laid down 1 July 1943; Launched 11 November 1943; Completed 29 May 1944
Lambunao - Laid down 1 October 1943; Launched 11 Feb 1944; Completed 29 August 1944
Leganes - Laid down 1 October 1943; Launched 11 Feb 1944; Completed 29 August 1944
Alcantara - Laid down 1 January 1944; Launched 13 May 1944; Completed 29 November 1944
Allacapan - Laid down 1 January 1944; Launched 13 May 1944; Completed 29 November 1944
Pansur - Laid down 1 April 1944; Launched 12 August 1944; Completed 28 February 1945
Poblacion - Laid down 1 April 1944; Launched 12 August 1944; Completed 28 February 1945
Saumay - Laid down 1 July 1944; Launched 11 November 1944; Completed 30 May 1945
Singapod - Laid down 1 July 1944; Launched 11 November 1944; Completed 30 May 1945
Abucay - Laid down 1 October 1944; Launched 11 February 1945; Completed 30 August 1945
Almacen - Laid down 1 October 1944; Launched 11 February 1945; Completed 30 August 1945
Tagumbas - Laid down 1 January 1945; Launched 14 May 1945; Completed 30 November 1945
Tangaran - Laid down 1 January 1945; Launched 14 May 1945; Completed 30 November 1945

Marinduque, Philippine Fleet Destroyer laid down 1945

Displacement: 2,200 t light; 2,326 t standard; 2,684 t normal; 2,971 t full load

Dimensions: Length overall / water x beam x draught

401.70 ft / 393.70 ft x 39.37 ft x 13.12 ft (normal load) [122.44 m / 120.00 m x 12.00 m x 4.00 m]

Armament:

6 - 5.12" / 130 mm guns (3x2 guns), 67.03lbs / 30.40kg shells, 1945 Model Dual purpose guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.38" / 35.0 mm guns (1x4 guns), 1.31lbs / 0.59kg shells, 1945 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns - superfiring
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1945 Model Anti-aircraft guns in deck mounts on side, all amidships
Weight of broadside 418 lbs / 190 kg
Shells per gun, main battery: 300
8 - 24.0" / 610 mm above water torpedoes

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.59" / 15 mm 0.59" / 15 mm -
3rd: 0.59" / 15 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 42,387 shp / 31,621 Kw = 33.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 645 tons

Complement: 186 - 242

Cost: £1.871 million / $7.482 million

Distribution of weights at normal displacement:

Armament: 52 tons, 1.9 %
Armour: 21 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.2 %
Machinery: 1,070 tons, 39.9 %
Hull, fittings & equipment: 956 tons, 35.6 %
Fuel, ammunition & stores: 484 tons, 18.0 %
Miscellaneous weights: 100 tons, 3.7 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,297 lbs / 588 Kg = 19.4 x 5.1 " / 130 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.10

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.462
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 22.75 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 63
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.98 ft / 6.70 m
- Forecastle (20 %): 19.19 ft / 5.85 m
- Mid (50 %): 15.91 ft / 4.85 m
- Quarterdeck (15 %): 15.91 ft / 4.85 m
- Stern: 15.91 ft / 4.85 m
- Average freeboard: 17.28 ft / 5.27 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 149.5 %
- Above water (accommodation/working, high = better): 94.7 %
Waterplane Area: 10,375 Square feet or 964 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 48 lbs/sq ft or 236 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.62
- Longitudinal: 2.31
- Overall: 0.71
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

Breakdown of miscellaneous weight:

Radar - 25 tons
Sonar - 25 tons
A/S outfit -25 tons - four A/S mortars and two depth charge racks
Tropicalization - 15 tons
Reserved for future growth - 10 tons


Marinduque - Laid down 1 July 1945; Launched 13 November 1945; Completed 2 June 1946
Maricaban - Laid down 1 July 1945; Launched 13 November 1945; Completed 2 June 1946
Manalipa - Laid down 1 October 1945; Launched 13 February 1946; Completed 2 September 1946
Mantingue - Laid down 1 October 1945; Launched 13 February 1946; Completed 2 September 1946
Mahadi - Laid down 1 January 1946; Launched 16 May 1946; Completed 3 December 1946
Monteverde - Laid down 1 January 1946; Launched 16 May 1946; Completed 3 December 1946
Malapaso - Laid down 1 April 1946; Launched 14 August 1946; Completed 3 March 1947
Maracano - Laid down 1 April 1946; Launched 14 August 1946; Completed 3 March 1947
Balintawak - Laid down 1 July 1946; Launched 13 November 1946; Completed 2 June 1947
Bonawon - Laid down 1 July 1946; Launched 13 November 1946; Completed 2 June 1947
Baelaran - Laid down 1 July 1946; Launched 13 November 1946; Completed 2 June 1947
Buntay - Laid down 1 October 1946; Launched 13 February 1947; Completed 2 September 1947
Balugasan - Laid down 1 October 1946; Launched 13 February 1947; Completed 2 September 1947
Bilogo - Laid down 1 January 1947; Launched 16 May 1947; Completed 3 December 1947
Bagumbayan - Laid down 1 January 1947; Launched 16 May 1947; Completed 3 December 1947
Binondo - Laid down 1 January 1947; Launched 16 May 1947; Completed 3 December 1947

Cabanatuan, Philippine Escort Destroyer laid down 1947

Displacement: 2,180 t light; 2,362 t standard; 2,596 t normal; 2,784 t full load

Dimensions: Length overall / water x beam x draught

409.37 ft / 393.70 ft x 39.37 ft x 13.12 ft (normal load) [124.78 m / 120.00 m x 12.00 m x 4.00 m]

Armament:

4 - 5.12" / 130 mm guns (2x2 guns), 67.03lbs / 30.40kg shells, 1947 Model Dual purpose guns in deck mounts with hoists on centerline ends, evenly spread
8 - 2.24" / 57.0 mm guns (4x2 guns), 5.65lbs / 2.56kg shells, 1947 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 313 lbs / 142 kg
Shells per gun, main battery: 700
5 - 24.0" / 610 mm above water torpedoes

Armor:

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.59" / 15 mm 0.59" / 15 mm -

Conning tower: 1.57" / 40 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 41,080 shp / 30,646 Kw = 33.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 422 tons

Complement: 181 - 236

Cost: £1.827 million / $7.310 million

Distribution of weights at normal displacement:

Armament: 39 tons, 1.5 %
Armor: 25 tons, 1.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 19 tons, 0.7 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 1,015 tons, 39.1 %
Hull, fittings & equipment: 971 tons, 37.4 %
Fuel, ammunition & stores: 416 tons, 16.0 %
Miscellaneous weights: 130 tons, 5.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,391 lbs / 631 Kg = 20.8 x 5.1 " / 130 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.30

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.447
Length to Beam Ratio: 10.00: 1
'Natural speed' for length: 22.79 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 28.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.29 ft / 7.10 m
- Forecastle (20 %): 22.64 ft / 6.90 m
- Mid (50 %): 21.98 ft / 6.70 m (14.44 ft / 4.40 m aft of break)
- Quarterdeck (15 %): 14.44 ft / 4.40 m
- Stern: 14.44 ft / 4.40 m
- Average freeboard: 18.49 ft / 5.64 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 147.8 %
- Above water (accommodation/working, high = better): 138.1 %
Waterplane Area: 10,242 Square feet or 952 Square meters
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 47 lbs/sq ft or 229 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.61
- Longitudinal: 2.99
- Overall: 0.72
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
Good seaboat, rides out heavy weather easily

Reserved for air warning radar - 20 tons
Reserved for surface search radar - 20 tons
Reserved for fire control radar - 20 tons
Reserved for AS detection equipment - 20 tons
Reserved for Ahead-Thrown AS Weapon - 20 tons
Reserved for AS outfit including DC and K-guns - 30 tons


Cabanatuan – Laid down 1 April 1947; Launched 14 August 1947; Completed 2 March 1948
Calamba – Laid down 1 April 1947; Launched 14 August 1947; Completed 2 March 1948
Lamitan - Laid down 1 July 1947; Launched 13 November 1947; Completed 1 June 1948
Lucena - Laid down 1 July 1947; Launched 13 November 1947; Completed 1 June 1948
Malabacat - Laid down 1 October 1947; Launched 13 February 1948; Completed 1 September 1948
Morong - Laid down 1 October 1947; Launched 13 February 1948; Completed 1 September 1948
Solano - Laid down 1 January 1948; Launched 15 May 1948; Completed 2 December 1948
Socorro - Laid down 1 January 1948; Launched 15 May 1948; Completed 2 December 1948
Pola - Laid down 1 January 1948; Launched 15 May 1948; Completed 2 December 1948
Pontevedra - Laid down 1 January 1948; Launched 15 May 1948; Completed 2 December 1948
Roxas - Laid down 1 April 1948; Launched 14 August 1948; Completed 3 March 1949
Rosario - Laid down 1 April 1948; Launched 14 August 1948; Completed 3 March 1949
Sevilla - Laid down 1 July 1948; Launched 13 November 1948
Sebaste - Laid down 1 July 1948; Launched 13 November 1948
Calatrava - Laid down 1 July 1948; Launched 13 November 1948
Valladolid - Laid down 1 July 1948; Launched 13 November 1948