WesWorld

Various different Irish-flagged merchant ships, in no particular order. (This is intended as a representative overview of the ships, not an exhaustive summary.)

- Irish Tricolor class cargo liner
- James Connolly class ferry
- Wolfe Tone class ferry
- Fastnet Rock class coaster
- Inverdargle class tanker
- Inverlane class tanker
- Irish Oak cargo ship (representative)

Irish Tricolor class, Irish Cargo Liner laid down 1941
Ordered by Irish & Oriental Shipping Ltd. in 1941.

Displacement:
9,378 t light; 9,696 t standard; 15,902 t normal; 20,866 t full load

Dimensions: Length overall / water x beam x draught
505.35 ft / 485.56 ft x 66.60 ft x 27.23 ft (normal load)
154.03 m / 148.00 m x 20.30 m x 8.30 m

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 11,222 shp / 8,371 Kw = 17.00 kts
Range 41,750nm at 15.00 kts
Bunker at max displacement = 11,169 tons

Complement:
707 - 920

Cost:
£2.286 million / $9.143 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 297 tons, 1.9 %
Hull, fittings & equipment: 3,882 tons, 24.4 %
Fuel, ammunition & stores: 6,523 tons, 41.0 %
Miscellaneous weights: 5,200 tons, 32.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
40,550 lbs / 18,393 Kg = 375.5 x 6 " / 152 mm shells or 4.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.3 ft / 1.0 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.632
Length to Beam Ratio: 7.29 : 1
'Natural speed' for length: 22.04 kts
Power going to wave formation at top speed: 37 %
Trim (Max stability = 0, Max steadiness = 100): 26
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 13.00 ft / 3.96 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 38.50 ft / 11.73 m
- Forecastle (25 %): 35.00 ft / 10.67 m (28.00 ft / 8.53 m aft of break)
- Mid (50 %): 24.00 ft / 7.32 m
- Quarterdeck (15 %): 24.00 ft / 7.32 m
- Stern: 26.00 ft / 7.92 m
- Average freeboard: 27.75 ft / 8.46 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 42.9 %
- Above water (accommodation/working, high = better): 163.0 %
Waterplane Area: 24,366 Square feet or 2,264 Square metres
Displacement factor (Displacement / loading): 274 %
Structure weight / hull surface area: 86 lbs/sq ft or 420 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.87
- Longitudinal: 3.37
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, rides out heavy weather easily

Breakdown of Miscellaneous Weights:
- 220 tons for 20x 1st class passengers (11t per)
- 980 tons for 140x 2nd class passengers (7 tons per)
- 160 tons for 40x 3rd class passengers (4 tons per)
- 400 tons for facilities
- 60 tons for miscellaneous gear
- 1380 tons for refrigerated cargo
- 2000 tons for dry cargo
5200 tons total

Notes:
Range is actually 15,000nm at 15.00 kts. (Bunker = 4,105 tons)
7064 tons of low-stowed cargo simmed as bunker fuel.

Ships in Class:
- MS Irish Tricolor
- MS Irish Republic
- MS Irish Chieftain

James Connolly class, Irish Ferry laid down 1940
Operated by the Irish Ferries Company.

Displacement:
3,342 t light; 3,422 t standard; 4,000 t normal; 4,463 t full load

Dimensions: Length overall / water x beam x draught
370.36 ft / 360.89 ft x 50.03 ft x 13.12 ft (normal load)
112.88 m / 110.00 m x 15.25 m x 4.00 m

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 12,221 shp / 9,117 Kw = 22.00 kts
Range 3,250nm at 22.00 kts
Bunker at max displacement = 1,041 tons

Complement:
250 - 326

Cost:
£0.976 million / $3.905 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 327 tons, 8.2 %
Hull, fittings & equipment: 1,340 tons, 33.5 %
Fuel, ammunition & stores: 658 tons, 16.5 %
Miscellaneous weights: 1,675 tons, 41.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,179 lbs / 3,710 Kg = 75.7 x 6 " / 152 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.1 ft / 0.6 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.94

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.591
Length to Beam Ratio: 7.21 : 1
'Natural speed' for length: 22.04 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 18.00 ft / 5.49 m
- Average freeboard: 19.72 ft / 6.01 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 72.7 %
- Above water (accommodation/working, high = better): 196.7 %
Waterplane Area: 13,643 Square feet or 1,268 Square metres
Displacement factor (Displacement / loading): 172 %
Structure weight / hull surface area: 61 lbs/sq ft or 298 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.90
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, rides out heavy weather easily

Breakdown of Miscellaneous Weights:
- 1,675 tons for 1,200 passengers (day trip only, no cabins)

Ships in Class:
- SS James Connolly
- SS Edward Daly
- SS Constance Markievicz

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.

MS Fastnet Rock, Irish Coastal Freighter laid down 1934
Operated by Irish Shipping Ltd.

Displacement:
619 t light; 636 t standard; 859 t normal; 1,036 t full load

Dimensions: Length overall / water x beam x draught
186.33 ft / 180.45 ft x 31.82 ft x 9.02 ft (normal load)
56.79 m / 55.00 m x 9.70 m x 2.75 m

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 666 shp / 497 Kw = 12.00 kts
Range 12,000nm at 12.00 kts
Bunker at max displacement = 400 tons

Complement:
79 - 103

Cost:
£0.120 million / $0.478 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 19 tons, 2.2 %
Hull, fittings & equipment: 215 tons, 25.0 %
Fuel, ammunition & stores: 239 tons, 27.9 %
Miscellaneous weights: 385 tons, 44.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,574 lbs / 714 Kg = 14.6 x 6 " / 152 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.1 ft / 0.3 m
Roll period: 12.7 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 raised forecastle
Block coefficient: 0.580
Length to Beam Ratio: 5.67 : 1
'Natural speed' for length: 13.43 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 14.76 ft / 4.50 m
- Forecastle (20 %): 14.44 ft / 4.40 m (7.22 ft / 2.20 m aft of break)
- Mid (50 %): 7.22 ft / 2.20 m
- Quarterdeck (15 %): 7.55 ft / 2.30 m
- Stern: 7.87 ft / 2.40 m
- Average freeboard: 8.82 ft / 2.69 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 57.0 %
- Above water (accommodation/working, high = better): 70.8 %
Waterplane Area: 4,019 Square feet or 373 Square metres
Displacement factor (Displacement / loading): 203 %
Structure weight / hull surface area: 36 lbs/sq ft or 177 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 2.08
- Overall: 1.02
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

Ships in Class:
- Daunt Rock
- Skellig Rock
- Tuskar Rock
- Fastnet Rock

Notes:
Acquired secondhand via Nordmark.

Inverdargle class, Irish Tanker laid down 1938

Displacement:
6,508 t light; 6,813 t standard; 15,225 t normal; 21,955 t full load

Dimensions: Length overall / water x beam x draught
532.94 ft / 522.00 ft x 67.25 ft x 27.60 ft (normal load)
162.44 m / 159.11 m x 20.50 m x 8.41 m

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Geared drive, 1 shaft, 3,294 ihp / 2,457 Kw = 12.00 kts
Range 75,000nm at 12.00 kts
Bunker at max displacement = 15,142 tons

Complement:
684 - 890

Cost:
£1.428 million / $5.712 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 183 tons, 1.2 %
Hull, fittings & equipment: 3,401 tons, 22.3 %
Fuel, ammunition & stores: 8,717 tons, 57.3 %
Miscellaneous weights: 2,925 tons, 19.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
58,051 lbs / 26,331 Kg = 537.5 x 6 " / 152 mm shells or 8.7 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 4.7 ft / 1.4 m
Roll period: 13.1 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 raised forecastle, raised quarterdeck
Block coefficient: 0.550
Length to Beam Ratio: 7.76 : 1
'Natural speed' for length: 22.85 kts
Power going to wave formation at top speed: 18 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.00 ft / 1.83 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (20 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
- Mid (50 %): 16.00 ft / 4.88 m
- Quarterdeck (15 %): 22.00 ft / 6.71 m (16.00 ft / 4.88 m before break)
- Stern: 23.00 ft / 7.01 m
- Average freeboard: 19.44 ft / 5.92 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 26.4 %
- Above water (accommodation/working, high = better): 108.9 %
Waterplane Area: 23,760 Square feet or 2,207 Square metres
Displacement factor (Displacement / loading): 463 %
Structure weight / hull surface area: 87 lbs/sq ft or 423 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.54
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

Notes:
Built by DeutscheWerke, Hamburg.

Ships in Class:
- Inverdargle
- Inverilen
- Inverliffey
- Inversuir

Inverlane class, Irish Tanker laid down 1938

Displacement:
5,890 t light; 6,174 t standard; 14,190 t normal; 20,602 t full load

Dimensions: Length overall / water x beam x draught
509.76 ft / 497.00 ft x 63.75 ft x 28.50 ft (normal load)
155.38 m / 151.49 m x 19.43 m x 8.69 m

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 3,153 shp / 2,352 Kw = 12.00 kts
Range 96,000nm at 12.00 kts
Bunker at max displacement = 14,428 tons

Complement:
649 - 845

Cost:
£1.230 million / $4.921 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 86 tons, 0.6 %
Hull, fittings & equipment: 3,104 tons, 21.9 %
Fuel, ammunition & stores: 8,300 tons, 58.5 %
Miscellaneous weights: 2,700 tons, 19.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
57,330 lbs / 26,005 Kg = 530.8 x 6 " / 152 mm shells or 9.2 torpedoes
Stability (Unstable if below 1.00): 1.30
Metacentric height 4.1 ft / 1.2 m
Roll period: 13.2 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 raised forecastle, raised quarterdeck
Block coefficient: 0.550
Length to Beam Ratio: 7.80 : 1
'Natural speed' for length: 22.29 kts
Power going to wave formation at top speed: 19 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 8.00 ft / 2.44 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.00 ft / 8.23 m
- Forecastle (20 %): 25.00 ft / 7.62 m (17.50 ft / 5.33 m aft of break)
- Mid (50 %): 16.50 ft / 5.03 m
- Quarterdeck (15 %): 24.00 ft / 7.32 m (16.50 ft / 5.03 m before break)
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 19.71 ft / 6.01 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 24.3 %
- Above water (accommodation/working, high = better): 105.3 %
Waterplane Area: 21,445 Square feet or 1,992 Square metres
Displacement factor (Displacement / loading): 494 %
Structure weight / hull surface area: 84 lbs/sq ft or 411 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.75
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

Notes:
Built by Bremer Vulkan, Vegesac

Ships in Class:
- Inverlane
- Inverliffey
- Invershannon

SS Irish Oak, Irish Freighter laid down 1926
Representative of a number of secondhand freighters operated by Irish Shipping Ltd.

Displacement:
4,710 t light; 4,848 t standard; 6,882 t normal; 8,510 t full load

Dimensions: Length overall / water x beam x draught
489.76 ft / 482.28 ft x 52.49 ft x 16.40 ft (normal load)
149.28 m / 147.00 m x 16.00 m x 5.00 m

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Geared drive, 1 shaft, 3,479 ihp / 2,596 Kw = 14.00 kts
Range 24,750nm at 12.00 kts
Bunker at max displacement = 3,662 tons

Complement:
377 - 491

Cost:
£0.666 million / $2.665 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 200 tons, 2.9 %
Hull, fittings & equipment: 2,010 tons, 29.2 %
Fuel, ammunition & stores: 2,172 tons, 31.6 %
Miscellaneous weights: 2,500 tons, 36.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16,821 lbs / 7,630 Kg = 155.7 x 6 " / 152 mm shells or 3.0 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.3 ft / 0.7 m
Roll period: 14.6 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 a flush deck
Block coefficient: 0.580
Length to Beam Ratio: 9.19 : 1
'Natural speed' for length: 21.96 kts
Power going to wave formation at top speed: 23 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.79 ft / 7.25 m
- Forecastle (25 %): 20.51 ft / 6.25 m
- Mid (50 %): 17.22 ft / 5.25 m
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 18.86 ft / 5.75 m
- Average freeboard: 19.11 ft / 5.83 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 50.1 %
- Above water (accommodation/working, high = better): 162.4 %
Waterplane Area: 17,716 Square feet or 1,646 Square metres
Displacement factor (Displacement / loading): 237 %
Structure weight / hull surface area: 68 lbs/sq ft or 333 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.48
- 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