WesWorld

Repository for data pertaining to coast defense battleships, escort cruisers and similar warships.

(Historical data)

The decision in late 1937 to purchase the Italian battleship Andrea Doria for scrapping was later on considered a fiscal waste; auditors in the late 1940 found out the Minister of the Navy at the time got a nice kickback payment from the company doing the scrapping of the ship. The turrets of the scrapped battleship were rebored and later reused in two laid down in early 1938; both ships moving away from the common practice and named after two former Presidents of the Republic.

Thanks Brock for the SIM

PRS Presidente Bonifacio, Philippine Pocket Battleship laid down 1938

Displacement: 17,675 t light; 18,655 t standard; 19,914 t normal; 20,920 t full load

Dimensions: Length overall / water x beam x draught

557.74 ft / 557.74 ft x 85.30 ft (Bulges 91.86 ft) x 25.43 ft (normal load) [170.00 m / 170.00 m x 26.00 m (Bulges 28.00 m) x 7.75 m]

Armament:

6 - 12.60" / 320 mm guns (2x3 guns), 999.81lbs / 453.51kg shells, 1938 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread
4 - 4.53" / 115 mm guns (2x2 guns), 46.40lbs / 21.05kg shells, 1938 Model Dual purpose guns in turrets (on barbettes) on centreline ends, evenly spread, all raised mounts
12 - 4.53" / 115 mm guns (6x2 guns), 46.40lbs / 21.05kg shells, 1938 Model Dual purpose guns in deck mounts with hoists on side, evenly spread, 2 raised mounts
36 - 1.38" / 35.0 mm guns (3x12 guns), 1.31lbs / 0.59kg shells, 1938 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 6,788 lbs / 3,079 kg
Shells per gun, main battery: 150

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 11.0" / 280 mm 314.96 ft / 96.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 87 % of normal length

Torpedo Bulkhead and Bulges: 1.57" / 40 mm 362.53 ft / 110.50 m 23.10 ft / 7.04 m

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 280 mm 7.87" / 200 mm 9.06" / 230 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.18" / 30 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm

Armour deck: 4.45" / 113 mm, Conning tower: 11.02" / 280 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 70,194 shp / 52,365 Kw = 28.00 kts
Range 12,000nm at 12.00 kts
(Range 7,500nm at 15.00 kts)
Bunker at max displacement = 2,265 tons

Complement: 837 - 1,089

Cost: £9.021 million / $36.084 million

Distribution of weights at normal displacement:

Armament: 849 tons, 4.3 %
Armour: 6,733 tons, 33.8 %
- Belts: 2,046 tons, 10.3 %
- Torpedo bulkhead: 488 tons, 2.5 %
- Armament: 1,220 tons, 6.1 %
- Armour Deck: 2,804 tons, 14.1 %
- Conning Tower: 174 tons, 0.9 %
Machinery: 1,922 tons, 9.7 %
Hull, fittings & equipment: 7,971 tons, 40.0 %
Fuel, ammunition & stores: 2,239 tons, 11.2 %
Miscellaneous weights: 200 tons, 1.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 34,562 lbs / 15,677 Kg = 34.6 x 12.6 " / 320 mm shells or 6.0 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 5.1 ft / 1.6 m
Roll period: 17.1 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:

Hull has low quarterdeck and transom stern
Block coefficient: 0.535
Length to Beam Ratio: 6.07 : 1
'Natural speed' for length: 28.02 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 55
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: 27.40 ft / 8.35 m
- Forecastle (20 %): 24.61 ft / 7.50 m
- Mid (50 %): 22.97 ft / 7.00 m
- Quarterdeck (15 %): 15.58 ft / 4.75 m (22.97 ft / 7.00 m before break)
- Stern: 15.58 ft / 4.75 m
- Average freeboard: 22.66 ft / 6.91 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 86.4 %
- Above water (accommodation/working, high = better): 181.0 %
Waterplane Area: 34,074 Square feet or 3,166 Square metres
Displacement factor (Displacement / loading): 113 %
Structure weight / hull surface area: 161 lbs/sq ft or 786 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.14
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent