Wolfe Tone, Irish Ferry laid down 1940
Operated by the Irish Ferries Company. Built in Chile by ASMAR.
Displacement:
4,900 t light; 5,038 t standard; 6,888 t normal; 8,368 t full load
Dimensions: Length overall / water x beam x draught
415.19 ft / 393.70 ft x 62.01 ft x 14.11 ft (normal load)
126.55 m / 120.00 m x 18.90 m x 4.30 m
Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 9,437 shp / 7,040 Kw = 18.00 kts
Range 11,200nm at 18.00 kts
Bunker at max displacement = 3,330 tons
Complement:
377 - 491
Cost:
£1.241 million / $4.964 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 252 tons, 3.7 %
Hull, fittings & equipment: 2,148 tons, 31.2 %
Fuel, ammunition & stores: 1,988 tons, 28.9 %
Miscellaneous weights: 2,500 tons, 36.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
20,875 lbs / 9,469 Kg = 193.3 x 6 " / 152 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 3.4 ft / 1.0 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.700
Length to Beam Ratio: 6.35 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.99 ft / 9.75 m
- Forecastle (20 %): 25.98 ft / 7.92 m
- Mid (50 %): 22.01 ft / 6.71 m
- Quarterdeck (15 %): 12.01 ft / 3.66 m (24.02 ft / 7.32 m before break)
- Stern: 12.01 ft / 3.66 m
- Average freeboard: 22.73 ft / 6.93 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.4 %
- Above water (accommodation/working, high = better): 232.0 %
Waterplane Area: 19,567 Square feet or 1,818 Square metres
Displacement factor (Displacement / loading): 229 %
Structure weight / hull surface area: 73 lbs/sq ft or 357 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.62
- 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 Weights:
520 tons for 52x 4-person cabins (208 passengers at 2.5t per head)
112 tons for 4x 4-person 1st class cabins (16 passengers at 7 tons per head)
100 tons for saloon
120 tons for ship's restaurant
20 tons for observation deck
600 tons for eight Class-A lifeboats and gear
1028 tons for vehicles and onboard cargo
2,500 tons total
Notes:
Range is actually 4,000nm at 18.00 kts: bunker at max displacement is 1,229 tons. 2101 tons of bunker fuel simmed as ballast and deep-stowed cargo.