San Cristobal, Iberia Troopship laid down 1931
San Cristobal
San Sebastian
San Francisco
San Nicolas
San Diego
San Juan
Displacement:
7,429 t light; 7,628 t standard; 9,097 t normal; 10,272 t full load
Dimensions: Length overall / water x beam x draught
600.00 ft / 600.00 ft x 66.00 ft x 15.00 ft (normal load)
182.88 m / 182.88 m x 20.12 m x 4.57 m
Armament:
4 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.40kg shells, 1931 Model
Quick firing guns in deck mounts
on side ends, evenly spread
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1927 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 287 lbs / 130 kg
Shells per gun, main battery: 100
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 0.79" / 20 mm -
2nd: 0.79" / 20 mm 0.79" / 20 mm -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 1 shaft, 13,997 shp / 10,441 Kw = 20.00 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 2,644 tons
Complement:
465 - 605
Cost:
£1.522 million / $6.087 million
Distribution of weights at normal displacement:
Armament: 36 tons, 0.4 %
Armour: 24 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 419 tons, 4.6 %
Hull, fittings & equipment: 3,451 tons, 37.9 %
Fuel, ammunition & stores: 1,667 tons, 18.3 %
Miscellaneous weights: 3,500 tons, 38.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,795 lbs / 10,793 Kg = 355.0 x 5.1 " / 130 mm shells or 3.1 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 3.4 ft / 1.0 m
Roll period: 15.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.91
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak
Block coefficient: 0.536
Length to Beam Ratio: 9.09 : 1
'Natural speed' for length: 24.49 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 37
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: 28.00 ft / 8.53 m
- Forecastle (15 %): 24.00 ft / 7.32 m (32.00 ft / 9.75 m aft of break)
- Mid (50 %): 32.00 ft / 9.75 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 23.04 ft / 7.02 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60.6 %
- Above water (accommodation/working, high = better): 259.4 %
Waterplane Area: 26,389 Square feet or 2,452 Square metres
Displacement factor (Displacement / loading): 196 %
Structure weight / hull surface area: 84 lbs/sq ft or 411 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.37
- 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, can fire her guns in the heaviest weather
3500 tons Misc. weight
300 tons = 10 BDA (Landing Craft, armoured overall - 40 troops, 15m x 3,4m x 1m, 8 knots, 2 x 13mm, 30 tons)
120 tons = 6 BDS (Assault Boats, armoured ramp - 17 troops, 10m x2m x 1m, 20 knots, 2 x 13mm, 20 tons)
1000 tons = 500 Marines
300 tons = Workshops and lifting gear
1500 tons = Stores
280 tons = Command & Control Facilities