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(Historical data)

Sibuyan, Filipino carrier laid down 1934

Displacement: 16,027 t light; 16,518 t standard; 18,657 t normal; 20,369 t full load

Dimensions: Length overall / water x beam x draught

684.38 ft / 684.38 ft x 81.69 ft x 23.36 ft (normal load) [208.60 m / 208.60 m x 24.90 m x 7.12 m]

Armament:

16 - 4.53" / 115 mm guns (8x2 guns), 48.50lbs / 22.00kg shells, 1934 Model Dual purpose guns in deck mounts with hoists on centreline ends, evenly spread, all raised mounts - superfiring
30 - 1.38" / 35.0 mm guns (15x2 guns), 1.32lbs / 0.60kg shells, 1934 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
16 - 0.54" / 13.7 mm guns (4x4 guns), 0.11lbs / 0.05kg shells, 1934 Model Machine guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 817 lbs / 371 kg
Shells per gun, main battery: 250

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 466.99 ft / 142.34 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 105 % of normal length

Torpedo Bulkhead: 1.97" / 50 mm 466.99 ft / 142.34 m 9.84 ft / 3.00 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: 0.79" / 20 mm - -

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

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 101,876 shp / 76,000 Kw = 31.87 kts
Range 20,000nm at 12.00 kts
Bunker at max displacement = 3,851 tons

Complement: 797 - 1,037

Cost: £5.172 million / $20.686 million

Distribution of weights at normal displacement:

Armament: 98 tons, 0.5 %
Armour: 3,050 tons, 16.4 %
- Belts: 379 tons, 2.0 %
- Torpedo bulkhead: 335 tons, 1.8 %
- Armament: 43 tons, 0.2 %
- Armour Deck: 2,257 tons, 12.1 %
- Conning Tower: 36 tons, 0.2 %
Machinery: 2,931 tons, 15.7 %
Hull, fittings & equipment: 6,027 tons, 32.3 %
Fuel, ammunition & stores: 2,631 tons, 14.1 %
Miscellaneous weights: 3,920 tons, 21.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 27,317 lbs / 12,391 Kg = 588.7 x 4.5 " / 115 mm shells or 4.0 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 4.2 ft / 1.3 m
Roll period: 16.7 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 8.38: 1
'Natural speed' for length: 30.28 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 63
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: 30.18 ft / 9.20 m
- Forecastle (20 %): 20.77 ft / 6.33 m
- Mid (50 %): 20.77 ft / 6.33 m
- Quarterdeck (15 %): 20.77 ft / 6.33 m
- Stern: 20.77 ft / 6.33 m
- Average freeboard: 21.52 ft / 6.56 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 104.4 %
- Above water (accommodation/working, high = better): 192.3 %
Waterplane Area: 38,738 Square feet or 3,599 Square metres
Displacement factor (Displacement / loading): 137 %
Structure weight / hull surface area: 109 lbs/sq ft or 535 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.15
- Overall: 1.00
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