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1

Thursday, September 30th 2004, 7:40am

Auxillary's

Floatplane Tenders

Praia (sold to Chile)
Mindelo (sold to Chile)

Arracife (transferred to Byzantium)
Tarrafal (transferred to Byzantium)

Airship Tenders

Lamia
Tronagarru

Blimp Tenders

Uprising
Upsurge

Troop Transports

Scythia
Nineveh
Gadir
Tanais

Sylax (Taken out of service)
Plato (Taken out of service)
Hesiod (Taken out of service)
Plinius (Taken out of service)

Ur (Taken out of service)
Itsaso (Taken out of service)

Multi purpose sub suport ships

Patronus
Efficax

Sub Tenders

Alaunia
Artifex
Ausonia

Destroyer Tenders

Elasippos
Diaprepes


Engineers training ship

Satyrides (Taken out of service)

Polar exploration vessels
Adventure

2

Saturday, January 29th 2005, 8:41am

Praia class Float Plane Tender

Praia, Mindelo (both sold to Chile)


It is expected that these two ships will eventually be replaced by purpose built ships.

Atlantis Floatplane carrier laid down 1918

Displacement:
4,020 t light; 4,118 t standard; 4,466 t normal; 4,745 t full load

Dimensions: Length overall / water x beam x draught
369.27 ft / 365.00 ft x 46.00 ft x 14.00 ft (normal load)
112.55 m / 111.25 m x 14.02 m x 4.27 m

Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1918 Model
Breech loading guns in deck mounts with hoists
on centreline, all amidships
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, all aft
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 95 lbs / 43 kg
Shells per gun, main battery: 140

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 13,997 shp / 10,442 Kw = 21.50 kts
Range 9,000nm at 10.00 kts
Bunker at max displacement = 627 tons

Complement:
273 - 355

Cost:
£0.443 million / $1.771 million

Distribution of weights at normal displacement:
Armament: 12 tons, 0.3 %
Machinery: 505 tons, 11.3 %
Hull, fittings & equipment: 2,103 tons, 47.1 %
Fuel, ammunition & stores: 446 tons, 10.0 %
Miscellaneous weights: 1,400 tons, 31.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,649 lbs / 3,469 Kg = 239.0 x 4.0 " / 102 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 1.6 ft / 0.5 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.665
Length to Beam Ratio: 7.93 : 1
'Natural speed' for length: 19.10 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 25.00 ft / 7.62 m (18.00 ft / 5.49 m aft of break)
- Mid (0 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 18.00 ft / 5.49 m
- Average freeboard: 19.48 ft / 5.94 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 73.6 %
- Above water (accommodation/working, high = better): 163.8 %
Waterplane Area: 13,040 Square feet or 1,211 Square metres
Displacement factor (Displacement / loading): 178 %
Structure weight / hull surface area: 92 lbs/sq ft or 451 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.37
- Longitudinal: 4.50
- Overall: 1.55
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

*Sold to Chile*

3

Saturday, January 29th 2005, 8:43am

Arrecife class Float Plane Tender


Arrecife, Tarrafal

Float Plane Carriers laid down 1917

Displacement:
3,745 t light; 3,840 t standard; 4,309 t normal; 4,684 t full load

Dimensions: Length overall / water x beam x draught
350.27 ft / 340.00 ft x 46.00 ft x 14.50 ft (normal load)
106.76 m / 103.63 m x 14.02 m x 4.42 m

Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1917 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1917 Model
Anti-aircraft guns in deck mounts
on side, all aft
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1917 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 95 lbs / 43 kg
Shells per gun, main battery: 140

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 15,617 shp / 11,650 Kw = 22.00 kts
Range 8,000nm at 12.00 kts
Bunker at max displacement = 845 tons

Complement:
265 - 345

Cost:
£0.402 million / $1.609 million

Distribution of weights at normal displacement:
Armament: 12 tons, 0.3 %
Machinery: 572 tons, 13.3 %
Hull, fittings & equipment: 1,961 tons, 45.5 %
Fuel, ammunition & stores: 564 tons, 13.1 %
Miscellaneous weights: 1,200 tons, 27.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,972 lbs / 3,162 Kg = 217.9 x 4.0 " / 102 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 1.6 ft / 0.5 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.78

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.665
Length to Beam Ratio: 7.39 : 1
'Natural speed' for length: 18.44 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 8.00 ft / 2.44 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 24.00 ft / 7.32 m (18.00 ft / 5.49 m aft of break)
- 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: 19.36 ft / 5.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.2 %
- Above water (accommodation/working, high = better): 157.2 %
Waterplane Area: 12,146 Square feet or 1,128 Square metres
Displacement factor (Displacement / loading): 177 %
Structure weight / hull surface area: 92 lbs/sq ft or 451 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.35
- Longitudinal: 5.06
- Overall: 1.54
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

4

Saturday, January 29th 2005, 8:47am

Lamia, Atlantian Airship Tender


Lamia, Tronagarru

converted Oil Tanker laid down 1925, converted to Airship Tender 1928

Displacement:
10,155 t light; 10,414 t standard; 12,417 t normal; 14,019 t full load

Dimensions: Length overall / water x beam x draught
446.88 ft / 435.00 ft x 65.62 ft x 26.25 ft (normal load)
136.21 m / 132.59 m x 20.00 m x 8.00 m

Armament:
2 - 4.50" / 114 mm guns (1x2 guns), 45.56lbs / 20.67kg shells, 1928 Model
Dual purpose guns in deck mount
on centreline forward
4 - 1.57" / 39.9 mm guns (2x2 guns), 1.93lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all amidships
6 - 0.79" / 20.1 mm guns (2x3 guns), 0.25lbs / 0.11kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 100 lbs / 46 kg
Shells per gun, main battery: 180

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.57" / 40 mm -
2nd: 0.79" / 20 mm - -

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 20,107 ihp / 15,000 Kw = 20.54 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 3,606 tons

Complement:
587 - 764

Cost:
£1.729 million / $6.918 million

Distribution of weights at normal displacement:
Armament: 13 tons, 0.1 %
Armour: 10 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 10 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,161 tons, 9.3 %
Hull, fittings & equipment: 3,971 tons, 32.0 %
Fuel, ammunition & stores: 2,262 tons, 18.2 %
Miscellaneous weights: 5,000 tons, 40.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,289 lbs / 6,481 Kg = 313.6 x 4.5 " / 114 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 2.7 ft / 0.8 m
Roll period: 16.7 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.46

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.580
Length to Beam Ratio: 6.63 : 1
'Natural speed' for length: 20.86 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 34
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: 22.00 ft / 6.71 m
- Forecastle (20 %): 15.50 ft / 4.72 m
- Mid (0 %): 15.50 ft / 4.72 m
- Quarterdeck (15 %): 15.50 ft / 4.72 m
- Stern: 15.50 ft / 4.72 m
- Average freeboard: 16.02 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 75.6 %
- Above water (accommodation/working, high = better): 103.1 %
Waterplane Area: 20,490 Square feet or 1,904 Square metres
Displacement factor (Displacement / loading): 167 %
Structure weight / hull surface area: 126 lbs/sq ft or 617 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.42
- Longitudinal: 2.57
- Overall: 1.51
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

5

Saturday, January 29th 2005, 8:52am

Future project

6

Saturday, January 29th 2005, 8:56am

A plan to convert two Callosus class scout cruisers to blimp tenders was once considered. The ships length and speed made them ideal for conversions under the CT rules as they would require minimum modifications to their speed.

Once the Blimp Tenders Uprising and Upsurge complete and undergo extensive trials it was expected that two Callosus class would convert.
The plan was droped in favour of purpose built ships.

7

Saturday, January 29th 2005, 8:59am

Admiralty class DD, Atlantis Destroyer
laid down 1916, conversion to blimp tender in 1928


Displacement:
1,025 t light; 1,061 t standard; 1,244 t normal; 1,391 t full load

Dimensions: Length overall / water x beam x draught
310.00 ft / 310.00 ft x 30.00 ft x 10.50 ft (normal load)
94.49 m / 94.49 m x 9.14 m x 3.20 m

Armament:
2 - 4.50" / 114 mm guns (1x2 guns), 45.56lbs / 20.67kg shells, 1928 Model
Quick firing guns in a deck mount with hoist
on centreline forward
2 - 1.57" / 39.9 mm guns (1x2 guns), 1.93lbs / 0.88kg shells, 1928 Model
Anti-aircraft guns in deck mount
on centreline forward
4 - 0.79" / 20.1 mm guns (2x2 guns), 0.25lbs / 0.11kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all forward
2 - 0.79" / 20.1 mm guns in single mounts, 0.25lbs / 0.11kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, all aft
Weight of broadside 96 lbs / 44 kg
Shells per gun, main battery: 200

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.78" / 20 mm - -

Machinery:
Diesel Internal combustion motors,
Direct drive, 2 shafts, 9,220 shp / 6,878 Kw = 24.00 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 331 tons

Complement:
104 - 136

Cost:
£0.154 million / $0.616 million

Distribution of weights at normal displacement:
Armament: 12 tons, 1.0 %
Armour: 3 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 344 tons, 27.6 %
Hull, fittings & equipment: 546 tons, 43.9 %
Fuel, ammunition & stores: 220 tons, 17.7 %
Miscellaneous weights: 120 tons, 9.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,462 lbs / 663 Kg = 32.1 x 4.5 " / 114 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.64

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.446
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 17.61 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 43
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (40 %): 10.00 ft / 3.05 m
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 12.56 ft / 3.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 108.1 %
- Above water (accommodation/working, high = better): 121.6 %
Waterplane Area: 5,913 Square feet or 549 Square metres
Displacement factor (Displacement / loading): 137 %
Structure weight / hull surface area: 48 lbs/sq ft or 235 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 2.62
- Overall: 1.05
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

8

Saturday, January 29th 2005, 9:07am

Pelican, Atlantean Submarine salvage and rescue ship laid down 1943

A salvage tug capable of submarine rescue operations.

Names: Pelican, Cormorant, Albatross, Fulmar, Petrel, Heron, Skua, Tern

Displacement:
1,419 t light; 1,461 t standard; 1,860 t normal; 2,179 t full load

Dimensions: Length overall / water x beam x draught
210.05 ft / 200.00 ft x 40.00 ft x 15.50 ft (normal load)
64.02 m / 60.96 m x 12.19 m x 4.72 m

Armament:
1 - 2.95" / 74.9 mm guns in single mounts, 12.84lbs / 5.82kg shells, 1943 Model
Dual purpose gun in deck mount
on centreline forward, 1 raised gun
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1943 Model
Breech loading guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1943 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 21 lbs / 9 kg
Shells per gun, main battery: 350

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 2,427 shp / 1,810 Kw = 15.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 718 tons

Complement:
141 - 184

Cost:
£0.397 million / $1.587 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.1 %
Armour: 1 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 63 tons, 3.4 %
Hull, fittings & equipment: 892 tons, 48.0 %
Fuel, ammunition & stores: 441 tons, 23.7 %
Miscellaneous weights: 460 tons, 24.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,403 lbs / 1,997 Kg = 343.0 x 3.0 " / 75 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.45

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.525
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 14.14 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.50 ft / 1.07 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.00 ft / 5.49 m
- Forecastle (20 %): 10.50 ft / 3.20 m (10.00 ft / 3.05 m aft of break)
- Mid (50 %): 10.00 ft / 3.05 m
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 10.70 ft / 3.26 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 40.4 %
- Above water (accommodation/working, high = better): 71.1 %
Waterplane Area: 5,266 Square feet or 489 Square metres
Displacement factor (Displacement / loading): 306 %
Structure weight / hull surface area: 105 lbs/sq ft or 513 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.93
- Longitudinal: 6.99
- Overall: 2.20
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily

Misc weights:
400 tons for 1 crane, diving bell, salvage equipment and firefighting equipment
8 tons for 2 depth charge throwers and 30 DC
2 tons for NSAS radar

9

Saturday, January 29th 2005, 9:15am

Sylax class Troop Transport

Sylax, Plato, Hesiod, Plinius

Atlantis Troop Transport laid down 1918

Displacement:
3,168 t light; 3,247 t standard; 3,581 t normal; 3,849 t full load

Dimensions: Length overall / water x beam x draught
373.17 ft / 365.00 ft x 42.00 ft x 14.00 ft (normal load)
113.74 m / 111.25 m x 12.80 m x 4.27 m

Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1918 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 93 lbs / 42 kg
Shells per gun, main battery: 120

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Oil fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 5,883 ihp / 4,388 Kw = 18.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 602 tons

Complement:
230 - 300

Cost:
£0.470 million / $1.880 million

Distribution of weights at normal displacement:
Armament: 12 tons, 0.3 %
Armour: 4 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 816 tons, 22.8 %
Hull, fittings & equipment: 2,036 tons, 56.8 %
Fuel, ammunition & stores: 413 tons, 11.5 %
Miscellaneous weights: 300 tons, 8.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,421 lbs / 2,459 Kg = 169.4 x 4.0 " / 102 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 1.9 ft / 0.6 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.584
Length to Beam Ratio: 8.69 : 1
'Natural speed' for length: 19.10 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.00 ft / 5.49 m
- Forecastle (20 %): 17.00 ft / 5.18 m (16.00 ft / 4.88 m aft of break)
- Mid (0 %): 16.00 ft / 4.88 m
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.50 ft / 5.03 m
- Average freeboard: 16.32 ft / 4.97 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.2 %
- Above water (accommodation/working, high = better): 142.8 %
Waterplane Area: 10,775 Square feet or 1,001 Square metres
Displacement factor (Displacement / loading): 176 %
Structure weight / hull surface area: 108 lbs/sq ft or 526 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.77
- Longitudinal: 3.95
- Overall: 1.92
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather



10

Saturday, January 29th 2005, 9:30am

Itsaso class Troop Transport

Itsaso, Ur

Atlantis Troop Transport laid down 1918

Displacement:
3,168 t light; 3,247 t standard; 3,581 t normal; 3,849 t full load

Dimensions: Length overall / water x beam x draught
373.17 ft / 365.00 ft x 42.00 ft x 14.00 ft (normal load)
113.74 m / 111.25 m x 12.80 m x 4.27 m

Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1918 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 93 lbs / 42 kg
Shells per gun, main battery: 120

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Oil fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 5,883 ihp / 4,388 Kw = 18.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 602 tons

Complement:
230 - 300

Cost:
£0.470 million / $1.880 million

Distribution of weights at normal displacement:
Armament: 12 tons, 0.3 %
Armour: 4 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 816 tons, 22.8 %
Hull, fittings & equipment: 2,036 tons, 56.8 %
Fuel, ammunition & stores: 413 tons, 11.5 %
Miscellaneous weights: 300 tons, 8.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,421 lbs / 2,459 Kg = 169.4 x 4.0 " / 102 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 1.9 ft / 0.6 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.584
Length to Beam Ratio: 8.69 : 1
'Natural speed' for length: 19.10 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.00 ft / 5.49 m
- Forecastle (20 %): 17.00 ft / 5.18 m (16.00 ft / 4.88 m aft of break)
- Mid (0 %): 16.00 ft / 4.88 m
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.50 ft / 5.03 m
- Average freeboard: 16.32 ft / 4.97 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.2 %
- Above water (accommodation/working, high = better): 142.8 %
Waterplane Area: 10,775 Square feet or 1,001 Square metres
Displacement factor (Displacement / loading): 176 %
Structure weight / hull surface area: 108 lbs/sq ft or 526 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.77
- Longitudinal: 3.95
- Overall: 1.92
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

11

Saturday, January 29th 2005, 9:37am

Patronus class, Multi purpose sub ship (MPSS ship)


Patronus(protector), Efficax (effective)
Atlantian Sub repair,depot,docking and salvage ship laid down 1924

Displacement:
6,761 t light; 6,914 t standard; 7,131 t normal; 7,277 t full load
Loading submergence 422 tons/feet

Dimensions:
325.00 ft x 64.00 ft x 20.00 ft (normal load)
99.06 m x 19.51 m x 6.10 m

Armament:
2 - 4.00" / 102 mm guns
4 - 3.00" / 76 mm guns
6 - 1.00" / 25 mm guns
Weight of broadside 121 lbs / 55 kg

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 3,750 shp / 2,798 Kw = 14.00 kts
Range 5,000nm at 10.00 kts

Complement:
388 - 504

Cost:
£0.824 million / $3.297 million

Distribution of weights at normal displacement:
Armament: 15 tons, 0.2 %
Machinery: 124 tons, 1.7 %
Hull, fittings & equipment: 3,623 tons, 50.8 %
Fuel, ammunition & stores: 370 tons, 5.2 %
Miscellaneous weights: 3,000 tons, 42.1 %

Metacentric height 2.7

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable and able to fight her guns in the heaviest weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.02
Shellfire needed to sink: 12,214 lbs / 5,540 Kg = 381.7 x 4.0 " / 102 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 2.8
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.01
Relative quality as seaboat: 1.88

Hull form characteristics:
Block coefficient: 0.600
Sharpness coefficient: 0.45
Hull speed coefficient 'M': 5.16
'Natural speed' for length: 18.03 kts
Power going to wave formation at top speed: 40 %
Trim: 37
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 54.0 %
Relative accommodation and working space: 101.5 %
(Average = 100%)
Displacement factor: 212 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 2.15
(Structure weight / hull surface area: 171 lbs / square foot or 836 Kg / square metre)
Relative longitudinal hull strength: 4.72
(for 14.00 ft / 4.27 m average freeboard, freeboard adjustment -0.15 ft)
Relative composite hull strength: 2.33

12

Sunday, August 14th 2005, 8:09am

Sub Tenders

Alaunia, Artifex and Ausonia
These three ships have tended to the D1/9 class fleet subs and various R class subs since their construction in 1916. Alaunia originally tended to the D1/9 class subs and later the newer R-74 class subs. Ammunition, torpedo and fuel load out vary depending on the class of subs they tend to. The extra bunkerage for submarines is not usually used for full refueling as fuel capacity is not great so these tenders are usually accompanied by a small tanker. These ships have a hoist position on the bow used to lift subs partially out of water resulting in the use of a clipper bow and a sturdy bow sprit.


Alaunia , Atlantean Submarine tender laid down 1916

Displacement:
2,608 t light; 2,677 t standard; 3,351 t normal; 3,890 t full load

Dimensions: Length overall / water x beam x draught
407.12 ft / 365.00 ft x 46.00 ft x 12.70 ft (normal load)
124.09 m / 111.25 m x 14.02 m x 3.87 m

Armament:
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
4 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1916 Model
Breech loading guns in deck mounts
on side, all amidships
Weight of broadside 29 lbs / 13 kg
Shells per gun, main battery: 150

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 2,300 shp / 1,716 Kw = 14.00 kts
Range 20,000nm at 10.00 kts
Bunker at max displacement = 1,212 tons

Complement:
219 - 286

Cost:
£0.174 million / $0.696 million

Distribution of weights at normal displacement:
Armament: 4 tons, 0.1 %
Machinery: 86 tons, 2.6 %
Hull, fittings & equipment: 1,018 tons, 30.4 %
Fuel, ammunition & stores: 743 tons, 22.2 %
Miscellaneous weights: 1,500 tons, 44.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,253 lbs / 3,290 Kg = 537.2 x 3.0 " / 76 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.9 ft / 0.6 m
Roll period: 13.9 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.87

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 7.93 : 1
'Natural speed' for length: 19.10 kts
Power going to wave formation at top speed: 29 %
Trim (Max stability = 0, Max steadiness = 100): 29
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 30.00 ft / 9.14 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 14.00 ft / 4.27 m
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 14.56 ft / 4.44 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 58.7 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 11,718 Square feet or 1,089 Square metres
Displacement factor (Displacement / loading): 197 %
Structure weight / hull surface area: 58 lbs/sq ft or 282 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.44
- Overall: 1.02
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc weights:
570 tons for fuel for subs (simmed as extra bunkerage)
500 tons for fuel
500 tons for ammunition and torpedo's
200 tons for Engineering workshop
200 tons for torpedo workshop
100 tons for two cranes

13

Sunday, August 14th 2005, 8:09am

Destroyer Tenders

Elasippos and Diaprepes
These ships were built to tend to the newer A through G and Admiralty class destroyers. They can carry enough stores to completely supply two destroyer squadrons (8 ships) but given the state of Atlantean port supplies post war they usually only carried half their capacity of ammo supplies and as a result could tender more than intended at full capacity.

Elasippos, Atlantean Destroyer Tender laid down 1919

Displacement:
6,399 t light; 6,678 t standard; 8,226 t normal; 9,465 t full load

Dimensions: Length overall / water x beam x draught
414.41 ft / 410.00 ft x 56.00 ft x 19.00 ft (normal load)
126.31 m / 124.97 m x 17.07 m x 5.79 m

Armament:
8 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1919 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1919 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 285 lbs / 129 kg
Shells per gun, main battery: 700

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 1 shaft, 5,012 shp / 3,739 Kw = 15.00 kts
Range 20,000nm at 12.00 kts
Bunker at max displacement = 2,787 tons

Complement:
431 - 561

Cost:
£0.608 million / $2.433 million

Distribution of weights at normal displacement:
Armament: 36 tons, 0.4 %
Machinery: 178 tons, 2.2 %
Hull, fittings & equipment: 3,185 tons, 38.7 %
Fuel, ammunition & stores: 1,828 tons, 22.2 %
Miscellaneous weights: 3,000 tons, 36.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,967 lbs / 8,603 Kg = 592.7 x 4.0 " / 102 mm shells or 3.0 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 2.4 ft / 0.7 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.660
Length to Beam Ratio: 7.32 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 34 %
Trim (Max stability = 0, Max steadiness = 100): 25
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.00 ft / 7.62 m
- Forecastle (20 %): 22.50 ft / 6.86 m (22.00 ft / 6.71 m aft of break)
- Mid (50 %): 22.00 ft / 6.71 m
- Quarterdeck (15 %): 22.00 ft / 6.71 m
- Stern: 24.00 ft / 7.32 m
- Average freeboard: 22.45 ft / 6.84 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.3 %
- Above water (accommodation/working, high = better): 170.4 %
Waterplane Area: 17,528 Square feet or 1,628 Square metres
Displacement factor (Displacement / loading): 226 %
Structure weight / hull surface area: 105 lbs/sq ft or 512 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.28
- Longitudinal: 4.14
- Overall: 1.44
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc weights:
1,000 tons for supplies
431 tons for spare materials for minor repairs
400 tons for 16,000 rounds of 1" ammunition
360 tons for recreational area's
200 tons for torpedo workshop
200 tons for engineering workshop
169 tons for fuel (1,311 additional tons simmed as ships bunkerage)
120 tons for depth charges and equipment spares
80 tons for 50x21" torpedo's
40 tons for 4x10 ton cranes

14

Sunday, August 14th 2005, 8:10am

Engineers training ship

Satyrides, Atlantis Engineers training ship and transport laid down 1918

Displacement:
7,518 t light; 7,694 t standard; 8,805 t normal; 9,694 t full load

Dimensions: Length overall / water x beam x draught
459.75 ft / 450.00 ft x 58.00 ft x 18.00 ft (normal load)
140.13 m / 137.16 m x 17.68 m x 5.49 m

Armament:
4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 2 lbs / 1 kg
Shells per gun, main battery: 500

Machinery:
Coal and oil fired boilers, reciprocating cruising steam engines plus steam turbines,
Geared drive, 3 shafts, 9,994 ihp / 7,456 Kw = 18.00 kts
Range 10,070nm at 12.00 kts
Bunker at max displacement = 2,000 tons (10% coal)

Complement:
453 - 590

Cost:
£0.688 million / $2.754 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 578 tons, 6.6 %
Hull, fittings & equipment: 2,940 tons, 33.4 %
Fuel, ammunition & stores: 1,288 tons, 14.6 %
Miscellaneous weights: 4,000 tons, 45.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,530 lbs / 6,137 Kg = 27,060.3 x 1.0 " / 25 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 2.3 ft / 0.7 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.99

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.656
Length to Beam Ratio: 7.76 : 1
'Natural speed' for length: 21.21 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 8.00 ft / 2.44 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (18 %): 20.00 ft / 6.10 m (18.00 ft / 5.49 m aft of break)
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 18.00 ft / 5.49 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 18.51 ft / 5.64 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 71.4 %
- Above water (accommodation/working, high = better): 152.2 %
Waterplane Area: 20,104 Square feet or 1,868 Square metres
Displacement factor (Displacement / loading): 171 %
Structure weight / hull surface area: 97 lbs/sq ft or 475 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.26
- Longitudinal: 1.87
- Overall: 1.31
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

15

Thursday, October 18th 2007, 7:05pm

Polar exploration vessel

Adventure, Atlantis polar exploration vessel laid down 1928

Displacement:
16,393 t light; 16,905 t standard; 24,139 t normal; 29,927 t full load

Dimensions: Length overall / water x beam x draught
557.74 ft / 557.74 ft x 98.43 ft x 22.97 ft (normal load)
170.00 m / 170.00 m x 30.00 m x 7.00 m

Armament:
4 - 5.12" / 130 mm guns (2x2 guns), 67.11lbs / 30.44kg shells, 1928 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 3.00" / 76.2 mm guns (2x2 guns), 13.50lbs / 6.12kg shells, 1928 Model
Breech loading guns in deck mounts
on side, all amidships
8 - 0.79" / 20.1 mm guns (4x2 guns), 0.25lbs / 0.11kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 324 lbs / 147 kg
Shells per gun, main battery: 150

Aviation: 4 sea/Ski planes, 2 catapults

Cargo: 5200 tons reserved for cargo and accomodations for scientific personnel

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 328.00 ft / 99.97 m 9.84 ft / 3.00 m
Ends: 3.94" / 100 mm 164.00 ft / 49.99 m 9.84 ft / 3.00 m
65.74 ft / 20.04 m Unarmoured ends
Main Belt covers 90 % of normal length

- Torpedo Bulkhead:
3.94" / 100 mm 328.00 ft / 99.97 m 19.69 ft / 6.00 m

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 27,329 shp / 20,387 Kw = 20.00 kts
Range 15,000nm at 20.00 kts
Bunker at max displacement = 13,022 tons

Complement:
967 - 1,258

Cost:
£2.776 million / $11.102 million

Distribution of weights at normal displacement:
Armament: 41 tons, 0.2 %
Armour: 1,468 tons, 6.1 %
- Belts: 526 tons, 2.2 %
- Torpedo bulkhead: 941 tons, 3.9 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 851 tons, 3.5 %
Hull, fittings & equipment: 8,834 tons, 36.6 %
Fuel, ammunition & stores: 7,746 tons, 32.1 %
Miscellaneous weights: 5,200 tons, 21.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
71,280 lbs / 32,332 Kg = 1,062.1 x 5.1 " / 130 mm shells or 18.7 torpedoes
Stability (Unstable if below 1.00): 1.44
Metacentric height 9.2 ft / 2.8 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.53

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.670
Length to Beam Ratio: 5.67 : 1
'Natural speed' for length: 23.62 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 46
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: 29.00 ft / 8.84 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (50 %): 21.00 ft / 6.40 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.70 ft / 5.39 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47.1 %
- Above water (accommodation/working, high = better): 141.4 %
Waterplane Area: 42,830 Square feet or 3,979 Square metres
Displacement factor (Displacement / loading): 278 %
Structure weight / hull surface area: 163 lbs/sq ft or 798 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.54
- Longitudinal: 1.61
- Overall: 1.55
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

This design is a result of colaberation between Atlantis and Russia

16

Saturday, October 14th 2017, 10:10pm

Mountain class , Atlantean Icebreaker laid down 1943

Displacement:
5,599 t light; 5,769 t standard; 7,102 t normal; 8,168 t full load

Dimensions: Length overall / water x beam x draught
295.29 ft / 290.00 ft x 74.50 ft x 19.50 ft (normal load)
90.00 m / 88.39 m x 22.71 m x 5.94 m

Armament:
2 - 5.10" / 130 mm guns (1x2 guns), 66.33lbs / 30.09kg shells, 1943 Model
Dual purpose guns in a deck mount with hoist
on centreline forward
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.88kg shells, 1943 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
8 - 0.79" / 20.0 mm guns (2x4 guns), 0.24lbs / 0.11kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.50" / 12.7 mm guns (6x2 guns), 0.06lbs / 0.03kg shells, 1943 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 139 lbs / 63 kg
Shells per gun, main battery: 350

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 180.00 ft / 54.86 m 19.60 ft / 5.97 m
Ends: 3.94" / 100 mm 110.00 ft / 33.53 m 19.60 ft / 5.97 m
Main Belt covers 95 % of normal length

- Torpedo Bulkhead:
1.18" / 30 mm 220.00 ft / 67.06 m 21.00 ft / 6.40 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 1.57" / 40 mm
2nd: 1.00" / 25 mm - -
3rd: 0.50" / 13 mm - -
4th: 0.50" / 13 mm - -

Machinery:
Diesel Internal combustion generators,
Electric motors, 3 shafts, 16,732 shp / 12,482 Kw = 20.00 kts
Range 12,500nm at 15.00 kts
Bunker at max displacement = 2,399 tons

Complement:
386 - 502

Cost:
£1.774 million / $7.097 million

Distribution of weights at normal displacement:
Armament: 17 tons, 0.2 %
Armour: 854 tons, 12.0 %
- Belts: 641 tons, 9.0 %
- Torpedo bulkhead: 202 tons, 2.8 %
- Armament: 11 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 432 tons, 6.1 %
Hull, fittings & equipment: 2,845 tons, 40.1 %
Fuel, ammunition & stores: 1,503 tons, 21.2 %
Miscellaneous weights: 1,450 tons, 20.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
20,923 lbs / 9,491 Kg = 315.5 x 5.1 " / 130 mm shells or 5.4 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 4.0 ft / 1.2 m
Roll period: 15.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.33

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.590
Length to Beam Ratio: 3.89 : 1
'Natural speed' for length: 17.03 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 28.00 ft / 8.53 m
- Mid (55 %): 28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 24.56 ft / 7.49 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 62.0 %
- Above water (accommodation/working, high = better): 187.8 %
Waterplane Area: 15,654 Square feet or 1,454 Square metres
Displacement factor (Displacement / loading): 215 %
Structure weight / hull surface area: 122 lbs/sq ft or 595 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.21
- Longitudinal: 6.91
- Overall: 1.44
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
Good seaboat, rides out heavy weather easily

Armor used to sim icebreaker plating, 1 shaft is for forward propeller
Ships in class: Mount Atlas. Mount Klydon
100 tons for 2 cranes
200 tons for 2 planes plus spares
20 tons for DC's and DC racks and Y guns
15 tons for enclosed turret for 5.1" guns
115 tons for radars and electronics
800 tons for stores/cargo
200 tons for extra accommodations and crew comforts

I based this design on the Ice Breaker Makinaw but with an armament and with heavier armor to simulate true icebreaker capabilities rather than the lighter construction used on Makinaw for great lakes sevice.