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M/V Orca-class Antarctic Natural Oils & Meat Packing Company Whale Factory Ship, laid down 1929

(Officially released data)

Displacement: 20,569 t light; 21,059 t standard; 22,355 t normal; 23,393 t full load

Dimensions: Length overall / water x beam x draught

535.00 ft / 535.00 ft x 75.00 ft x 30.00 ft (normal load) [163.07 m / 163.07 m x 22.86 m x 9.14 m]

Armour:

Conning tower: 3.15" / 80 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 26,875 shp / 20,049 Kw = 20.43 kts
Range 15,000nm at 10.00 kts (Bunkerage = 2,334 tons)

Complement: 913 - 1,188

Cost: £3.459 million / $13.838 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Armour: 54 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 54 tons, 0.2 %
Machinery: 825 tons, 3.7 %
Hull, fittings & equipment: 12,141 tons, 54.3 %
Fuel, ammunition & stores: 1,695 tons, 8.0 %
Miscellaneous weights: 7,640 tons, 33.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 38,283 lbs / 17,365 Kg = 354.4 x 6 " / 152 mm shells or 4.4 torpedoes
Stability (Unstable if below 1.00): 1.04
Metacentric height 3.5 ft / 1.1 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 42 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.51

Hull form characteristics:

Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.650
Length to Beam Ratio: 7.13 : 1
'Natural speed' for length: 23.13 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 23
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 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m before break)
- Stern: 26.00 ft / 7.92 m
- Average freeboard: 21.28 ft / 6.49 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 50.9 %
- Above water (accommodation/working, high = better): 115.4 %
Waterplane Area: 30,738 Square feet or 2,856 Square metres
Displacement factor (Displacement / loading): 235 %
Structure weight / hull surface area: 254 lbs/sq ft or 1,242 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.47
- Longitudinal: 4.23
- Overall: 2.60
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Government Furnished Equipment:

Engines...3,302t
Conning Towers...216t
Other Subsidized Equipment...364t
Total GFE for four ships...3,882 tons

Class of four vessels (Orca, Penguin, Sea Lion, Seal)

Dona Aniceta, Philippine Freighter laid down 1941

Displacement: 4,127 t light; 4,413 t standard; 14,254 t normal; 22,127 t full load

Dimensions: Length overall / water x beam x draught

447.93 ft / 439.63 ft x 55.77 ft x 25.75 ft (normal load) [136.53 m / 134.00 m x 17.00 m x 7.85 m]

Machinery:

Diesel Internal combustion motors, Geared drive, 1 shaft, 5,432 shp / 4,052 Kw = 14.00 kts
Range 120,000nm at 12.00 kts
Bunker at max displacement = 17,715 tons

Complement: 651 - 847

Cost: £1.017 million / $4.069 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 144 tons, 1.0 %
Hull, fittings & equipment: 2,784 tons, 19.5 %
Fuel, ammunition & stores: 10,127 tons, 71.0 %
Miscellaneous weights: 1,200 tons, 8.4 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 110,770 lbs / 50,244 Kg = 1,025.6 x 6 " / 152 mm shells or 17.3 torpedoes
Stability (Unstable if below 1.00): 1.52
Metacentric height 4.2 ft / 1.3 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.790
Length to Beam Ratio: 7.88 : 1
'Natural speed' for length: 20.97 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.62 ft / 7.20 m
- Forecastle (20 %): 20.83 ft / 6.35 m
- Mid (50 %): 18.04 ft / 5.50 m
- Quarterdeck (25 %): 18.04 ft / 5.50 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 19.24 ft / 5.87 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 14.3 %
Above water (accommodation/working, high = better): 117.5 %
Waterplane Area: 21,359 Square feet or 1,984 Square metres
Displacement factor (Displacement / loading): 959 %
Structure weight / hull surface area: 80 lbs/sq ft or 393 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.79
- 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
Excellent seaboat, comfortable, rides out heavy weather easily

Low-stowed cargo simmed as additional bunkers. Normal radius 15,000 nm on 1,293 tons; remaining bunkers represent low-stowed cargo of 8,500 tons

Breakdown of miscellaneous weight

Cargo handling equipment - 500 tons
Provision for deck cargo as required - 700 tons

Andreas Bonifacio, Philippine Oil Tanker laid down 1942

Displacement: 3,490 t light; 3,818 t standard; 16,405 t normal; 26,475 t full load

Dimensions: Length overall / water x beam x draught

476.21 ft / 463.91 ft x 62.89 ft x 26.25 ft (normal load) [145.15 m / 141.40 m x 19.17 m x 8.00 m]

Machinery:

Diesel Internal combustion motors, Geared drive, 1 shaft, 3,461 shp / 2,582 Kw = 12.00 kts
Range 142,750nm at 12.00 kts
Bunker at max displacement = 22,657 tons

Complement: 724 - 942

Cost: £0.858 million / $3.431 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 90 tons, 0.6 %
Hull, fittings & equipment: 3,199 tons, 19.5 %
Fuel, ammunition & stores: 12,915 tons, 78.7 %
Miscellaneous weights: 200 tons, 1.2 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 419,675 lbs / 190,361 Kg = 11,881.6 x 6 " / 152 mm shells or 71.0 torpedoes
Stability (Unstable if below 1.00): 2.17
Metacentric height 8.4 ft / 2.5 m
Roll period: 9.1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.750
Length to Beam Ratio: 7.38: 1
'Natural speed' for length: 21.54 kts
Power going to wave formation at top speed: 24 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.82 ft / 0.25 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (20 %): 21.33 ft / 6.50 m
- Mid (50 %): 18.04 ft / 5.50 m
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 19.46 ft / 5.93 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 5.2 %
Above water (accommodation/working, high = better): 120.9 %
Waterplane Area: 24,433 Square feet or 2,270 Square metres
Displacement factor (Displacement / loading): 1,000 %
Structure weight / hull surface area: 84 lbs/sq ft or 411 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.61
- 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, rides out heavy weather easily

Breakdown of miscellaneous weight:

200 tons - reserved for cargo handling equipment

True bunkers 1,133 tons for radius of 12,000 nm at 12 knots; remainder of bunkers used to sim POL as cargo: 10,400 tons

7,600 tons gross; 11,200 tons deadweight

Isla de Mindanao, Philippine Cargo Liner laid down 1943

Displacement: 4,840 t light; 5,156 t standard; 15,801 t normal; 24,317 t full load

Dimensions: Length overall / water x beam x draught

457.16 ft / 440.03 ft x 59.81 ft x 30.02 ft (normal load) [139.34 m / 134.12 m x 18.23 m x 9.15 m]

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 19,432 shp / 14,497 Kw = 19.50 kts
Range 61,000nm at 16.00 kts (see notes)
Bunker at max displacement = 19,162 tons (see notes)

Complement: 70 ? 92 (see notes)

Cost: £1.569 million / $6.274 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 502 tons, 3.2 %
Hull, fittings & equipment: 2,938 tons, 18.6 %
Fuel, ammunition & stores: 10,961 tons, 69.4 % (see notes)
Miscellaneous weights: 1,400 tons, 8.9 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 7,493 lbs/3,398 kg = 69.4 x 6?/152mm shells or 1.1 torpedoes (see notes)
Stability (Unstable if below 1.00): 1.50
Metacentric height 4.6 ft / 1.4 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 99 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.98

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.700
Length to Beam Ratio: 7.36 : 1
'Natural speed' for length: 20.98 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 5.00 ft / 1.53 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.02 ft / 9.15 m
- Forecastle (20 %): 18.50 ft / 5.64 m
- Mid (50 %): 17.55 ft / 5.35 m
- Quarterdeck (15 %): 18.50 ft / 5.64 m
- Stern: 19.03 ft / 5.80 m
- Average freeboard: 19.16 ft / 5.84 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 21.7 %
- Above water (accommodation/working, high = better): 102.9 %
Waterplane Area: 21,094 Square feet or 1,960 Square metres
Displacement factor (Displacement / loading): 657 %
Structure weight / hull surface area: 83 lbs/sq ft or 408 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0.92
- Longitudinal: 1.97
- Overall: 1.00
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
Excellent seaboat, comfortable, rides out heavy weather easily

Notes:

True range 12,000 nm on bunkers of 3,884 tons. Additional bunkers used to sim low-stowed cargo of 10,000 tons

Breakdown of miscellaneous weight:

400 tons reserved for cargo handling equipment
1,000 tons represents provision for deck cargo

Crew complement and survivability values reduced by 90% to account for commercial vice naval service.