Battery Alpha, Republic of ireland Coastal Defense laid down 1913
Displacement:
-414 t light; 0 t standard; 0 t normal; 0 t full load
Dimensions: Length overall / water x beam x draught
0.00 ft / 0.00 ft x 0.00 ft x 0.00 ft (normal load)
0.00 m / 0.00 m x 0.00 m x 0.00 m
Armament:
2 - 11.00" / 279 mm guns (1x2 guns), 665.50lbs / 301.87kg shells, 1902 Model
Breech loading guns in a turret (on a barbette)
on centreline amidships
8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1913 Model
Breech loading guns in deck mounts
on side, all amidships
8 - 3.00" / 76.2 mm guns (4x2 guns), 13.50lbs / 6.12kg shells, 1902 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 2,303 lbs / 1,045 kg
Shells per gun, main battery: 300
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 8.00" / 203 mm 8.00" / 203 mm
2nd: 5.00" / 127 mm 4.00" / 102 mm -
3rd: 3.00" / 76 mm 2.00" / 51 mm -
Machinery:
Immobile floating battery
Complement:
0 - 0
Cost:
£0.248 million / $0.992 million
Distribution of weights at normal displacement:
Armament: 288 tons, 0.0 %
Machinery: 0 tons, 0.0 %
Hull, fittings & equipment: NaN tons, 0.0 %
Fuel, ammunition & stores: 414 tons, 0.0 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
NaN lbs / NaN Kg = NaN x 11.0 " / 279 mm shells or NaN torpedoes
Stability (Unstable if below 1.00): NaN
Metacentric height NaN ft / NaN m
Roll period: NaN seconds
Steadiness - As gun platform (Average = 50 %): NaN %
- Recoil effect (Restricted arc if above 1.00): NaN
Seaboat quality (Average = 1.00): NaN
Hull form characteristics:
Hull has a flush deck
Block coefficient: NaN
Length to Beam Ratio: NaN : 1
'Natural speed' for length: 0.00 kts
Power going to wave formation at top speed: 0 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (50 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): NaN
- Above water (accommodation/working, high = better): NaN
Waterplane Area: NaN Square feet or NaN Square metres
Displacement factor (Displacement / loading): NaN
Structure weight / hull surface area: NaN lbs/sq ft or NaN Kg/sq metre
Hull strength (Relative):
- Cross-sectional: NaN
- Longitudinal: NaN
- Overall: NaN
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is extremely poor
Cost:
£0.248 million
Armament: 288 tons
Armour: 335 tons
So the cost to build is $2.48 and 1.246 BP per fort