WesWorld

Transfered vessels

Battleships
Arizaba (ex-Posiedon) sold to Mexico

Battlecruisers
Azaes class
Makedonia, Kypris (ex-Azaes, Evamon), sold to Greece 1921, repurchased in 1940

Cruisers
CL Active (sold to Colombia)

CL Warrior (sold to Chile)
CL Vindex (sold to Chile)

CL Argyll (sold to Canada)
CL Achilles (sold to Canada)
CL Adventure (sold to Canada)
CL Aurora (sold to Canada)
CL Astraea (sold to Chile)
CL Antrim (sold to Chile)

CD Undaunted (sold to Colombia)
CD Inconstant (sold to Colombia)

CD Forward (sold to Argentina)
CD Fort (sold to Argentina)

CD Eclipse (sold to Argentina)
CD Juno (sold to Argentina)

CL Thrasius (sold to Mexico)
CL Patroclius (sold to Mexico)
CL Valerius (sold to Australia)
CL Mazentius (sold to Australia)
CL Accrisius (sold to Mexico)
CL Favonius (sold to Mexico)

Destroyers

8 B class (sold to Chile)
8 C class (sold to Chile)
8 D class (sold to Chile)
16 E class DD's to Mexico

2 Admiralty type 2 converted to subchaser tenders, sold to Chile
8 Admiralty type 2 sold to Colombia

Floatplane tenders

Praia class Floatplane tenders

Michimalonco (Ex Praia) sold to Chile
Lautaro (Ex Mindelo) sold to Chile

Subchasers

SC-1 to 12

12 subchasers sold to Chile

Never were designs
Oberoth class super battleships (x4)
Massinissa class battleships (x2)
Calessus class Battleships (x4)
Alioth class Battlecruisers (x2)
Menestheus class Armored Cruisers (x3)

Scrapped vessels

CL Nereus (scrapped)
CL Parnassus (scrapped)
CL Tithonus (scrapped)

CLS Callosus (scrapped)
CLS Iphicles (scrapped)
CLS Orcus (scrapped)
CLS Vernus (scrapped)
CLS Cassius (scrapped)
CLS Erastius (scrapped)

CLS Brencis (scrapped)
CLS Magnus (scrapped)
CLS Attis (scrapped)
CLS Aleron (scrapped)

Oberoth, Moros, Talus, Acastus, Atlantean Battleship designed for 1937, all ships cancelled in favor of smaller design.

Displacement:
53,663 t light; 56,988 t standard; 62,222 t normal; 66,408 t full load

Dimensions: Length overall / water x beam x draught
890.35 ft / 866.50 ft x 120.00 ft x 34.00 ft (normal load)
271.38 m / 264.11 m x 36.58 m x 10.36 m

Armament:
9 - 16.50" / 419 mm guns (3x3 guns), 2,645.55lbs / 1,200.00kg shells, 1937 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
24 - 5.10" / 130 mm guns (12x2 guns), 66.33lbs / 30.09kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
32 - 1.58" / 40.0 mm guns (16x2 guns), 1.95lbs / 0.88kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 12 raised mounts
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0.50" / 12.7 mm guns (8x2 guns), 0.06lbs / 0.03kg shells, 1937 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 25,473 lbs / 11,554 kg
Shells per gun, main battery: 145

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.5" / 419 mm 530.00 ft / 161.54 m 14.76 ft / 4.50 m
Ends: 1.58" / 40 mm 335.00 ft / 102.11 m 14.76 ft / 4.50 m
1.50 ft / 0.46 m Unarmoured ends
Upper: 1.00" / 25 mm 530.00 ft / 161.54 m 10.00 ft / 3.05 m
Main Belt covers 94 % of normal length

- Torpedo Bulkhead:
2.35" / 60 mm 530.00 ft / 161.54 m 34.00 ft / 10.36 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.5" / 419 mm 12.0" / 305 mm 16.0" / 406 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm - -
4th: 0.79" / 20 mm - -
5th: 0.30" / 8 mm - -

- Armour deck: 7.50" / 191 mm, Conning tower: 16.50" / 419 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 130,000 shp / 96,980 Kw = 28.06 kts
Range 15,000nm at 15.00 kts
Bunker at max displacement = 9,420 tons

Complement:
1,969 - 2,560

Cost:
£25.526 million / $102.104 million

Distribution of weights at normal displacement:
Armament: 2,735 tons, 4.4 %
Armour: 23,678 tons, 38.1 %
- Belts: 6,172 tons, 9.9 %
- Torpedo bulkhead: 1,567 tons, 2.5 %
- Armament: 4,215 tons, 6.8 %
- Armour Deck: 11,166 tons, 17.9 %
- Conning Tower: 558 tons, 0.9 %
Machinery: 3,603 tons, 5.8 %
Hull, fittings & equipment: 23,297 tons, 37.4 %
Fuel, ammunition & stores: 8,559 tons, 13.8 %
Miscellaneous weights: 350 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
109,978 lbs / 49,885 Kg = 49.0 x 16.5 " / 419 mm shells or 20.2 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 8.3 ft / 2.5 m
Roll period: 17.5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.59
Seaboat quality (Average = 1.00): 1.26

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.616
Length to Beam Ratio: 7.22 : 1
'Natural speed' for length: 34.05 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 8.00 ft / 2.44 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.00 ft / 10.36 m
- Forecastle (20 %): 22.10 ft / 6.74 m
- Mid (50 %): 22.10 ft / 6.74 m
- Quarterdeck (15 %): 22.10 ft / 6.74 m
- Stern: 22.10 ft / 6.74 m
- Average freeboard: 23.05 ft / 7.03 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 65.6 %
- Above water (accommodation/working, high = better): 172.1 %
Waterplane Area: 80,478 Square feet or 7,477 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 222 lbs/sq ft or 1,086 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.16
- Overall: 1.01
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

BB Masinissa (Improved Philomedes), Atlantean Battleship laid down 1936, delayed till 1937

Ship names: Masinissa, Mathayus, both cancelled in favor of larger modified design.

Displacement:
41,515 t light; 43,914 t standard; 48,470 t normal; 52,115 t full load

Dimensions: Length overall / water x beam x draught
785.20 ft / 765.00 ft x 110.00 ft x 32.00 ft (normal load)
239.33 m / 233.17 m x 33.53 m x 9.75 m

Armament:
9 - 15.00" / 381 mm guns (3x3 guns), 1,687.50lbs / 765.44kg shells, 1936 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
24 - 5.10" / 130 mm guns (12x2 guns), 66.33lbs / 30.09kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, 8 raised mounts
16 - 1.58" / 40.0 mm guns (8x2 guns), 2.00lbs / 0.91kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 6 raised mounts
28 - 0.79" / 20.0 mm guns (7x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0.50" / 12.7 mm guns (8x2 guns), 0.06lbs / 0.03kg shells, 1936 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 16,819 lbs / 7,629 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 460.00 ft / 140.21 m 14.76 ft / 4.50 m
Ends: Unarmoured
Main Belt covers 93 % of normal length

- Torpedo Bulkhead:
2.15" / 55 mm 460.00 ft / 140.21 m 32.00 ft / 9.75 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.0" / 406 mm 11.7" / 297 mm 15.0" / 381 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.58" / 40 mm
3rd: 1.00" / 25 mm - -
4th: 0.79" / 20 mm - -
5th: 0.50" / 13 mm - -

- Armour deck: 6.50" / 165 mm, Conning tower: 3.95" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 115,000 shp / 85,790 Kw = 28.02 kts
Range 15,300nm at 15.00 kts
Bunker at max displacement = 8,201 tons

Complement:
1,633 - 2,123

Cost:
£19.355 million / $77.418 million

Distribution of weights at normal displacement:
Armament: 2,102 tons, 4.3 %
Armour: 17,655 tons, 36.4 %
- Belts: 4,800 tons, 9.9 %
- Torpedo bulkhead: 1,171 tons, 2.4 %
- Armament: 3,635 tons, 7.5 %
- Armour Deck: 7,937 tons, 16.4 %
- Conning Tower: 113 tons, 0.2 %
Machinery: 3,227 tons, 6.7 %
Hull, fittings & equipment: 18,330 tons, 37.8 %
Fuel, ammunition & stores: 6,956 tons, 14.4 %
Miscellaneous weights: 200 tons, 0.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
84,551 lbs / 38,352 Kg = 50.1 x 15.0 " / 381 mm shells or 14.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 6.9 ft / 2.1 m
Roll period: 17.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.630
Length to Beam Ratio: 6.95 : 1
'Natural speed' for length: 32.05 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.60 ft / 9.94 m
- Forecastle (20 %): 22.60 ft / 6.89 m
- Mid (50 %): 22.60 ft / 6.89 m
- Quarterdeck (15 %): 22.60 ft / 6.89 m
- Stern: 22.60 ft / 6.89 m
- Average freeboard: 23.40 ft / 7.13 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 69.0 %
- Above water (accommodation/working, high = better): 174.0 %
Waterplane Area: 66,000 Square feet or 6,132 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 209 lbs/sq ft or 1,021 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.04
- Longitudinal: 1.41
- Overall: 1.07
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

Poseidon class battleships

Arizaba (ex-Poseidon) sold to Mexico, repurchased once Mexico decided to dispose of her. Partail payment included the entire class of E type destroyers to Mexico.



Poseidon, Mexican (Atlantean built) Battleship laid down 1910 (Engine 1916)

Displacement:
26,226 t light; 27,868 t standard; 28,729 t normal; 29,417 t full load

Dimensions: Length overall / water x beam x draught
625.00 ft / 625.00 ft x 92.00 ft x 29.00 ft (normal load)
190.50 m / 190.50 m x 28.04 m x 8.84 m

Armament:
8 - 14.00" / 356 mm guns (4x2 guns), 1,372.00lbs / 622.33kg shells, 1910 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
Main guns limited to end-on fire
2 - 14.00" / 356 mm guns (1x2 guns), 1,372.00lbs / 622.33kg shells, 1910 Model
Breech loading guns in a turret (on a barbette)
on centreline amidships
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1910 Model
Breech loading guns in casemate mounts
on side, evenly spread, 4 raised mounts
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1915 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1915 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 15,506 lbs / 7,033 kg
Shells per gun, main battery: 120

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.0" / 305 mm 380.00 ft / 115.82 m 12.00 ft / 3.66 m
Ends: 6.00" / 152 mm 200.00 ft / 60.96 m 10.00 ft / 3.05 m
45.00 ft / 13.72 m Unarmoured ends
Upper: 8.00" / 203 mm 300.00 ft / 91.44 m 10.00 ft / 3.05 m
Main Belt covers 94 % of normal length

- Torpedo Bulkhead:
1.25" / 32 mm 580.00 ft / 176.78 m 27.00 ft / 8.23 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 9.20" / 234 mm 10.0" / 254 mm
2nd: 14.0" / 356 mm 9.20" / 234 mm 10.0" / 254 mm
3rd: 2.00" / 51 mm 1.00" / 25 mm -

- Armour deck: 2.50" / 64 mm, Conning tower: 10.00" / 254 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 43,277 shp / 32,285 Kw = 22.50 kts
Range 6,000nm at 10.00 kts
Bunker at max displacement = 1,549 tons

Complement:
1,103 - 1,434

Cost:
£2.772 million / $11.087 million

Distribution of weights at normal displacement:
Armament: 1,938 tons, 6.7 %
Armour: 9,975 tons, 34.7 %
- Belts: 3,979 tons, 13.8 %
- Torpedo bulkhead: 724 tons, 2.5 %
- Armament: 3,119 tons, 10.9 %
- Armour Deck: 1,950 tons, 6.8 %
- Conning Tower: 202 tons, 0.7 %
Machinery: 1,612 tons, 5.6 %
Hull, fittings & equipment: 12,600 tons, 43.9 %
Fuel, ammunition & stores: 2,503 tons, 8.7 %
Miscellaneous weights: 100 tons, 0.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38,207 lbs / 17,330 Kg = 27.8 x 14.0 " / 356 mm shells or 6.1 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 4.5 ft / 1.4 m
Roll period: 18.3 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 1.05
Seaboat quality (Average = 1.00): 1.44

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.603
Length to Beam Ratio: 6.79 : 1
'Natural speed' for length: 25.00 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 49
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: 26.00 ft / 7.92 m
- Forecastle (20 %): 26.00 ft / 7.92 m
- Mid (50 %): 26.00 ft / 7.92 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 21.08 ft / 6.42 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 89.8 %
- Above water (accommodation/working, high = better): 150.1 %
Waterplane Area: 42,173 Square feet or 3,918 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 211 lbs/sq ft or 1,028 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.69
- Overall: 1.07
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
Good seaboat, rides out heavy weather easily

Azeas class BC's

Both ships were sold prior to the signing of the Cleito treaty to compensate for the Arrogant class being retained as oversize carriers according to the treaty. The ships were repurchased when greece decided to dispose of them.

C-6 Kypris (ex Evamon)
-Laid Down: 1-Jul-09 Launched: 19-Aug-10 Completed: 1-May-12 Entered Service: 28-Oct-12

C-7 Makedonia (ex Azaes)
-Laid Down: 2-Jul-09 Launched: 14-Aug-10 Completed: 17-Apr-12 Entered Service: 14-Oct-12

Displacement:
25,124 t light; 26,391 t standard; 28,773 t normal; 30,564 t full load
Loading submergence 1,291 tons/feet

Dimensions:
702.00 ft x 88.00 ft x 26.00 ft (normal load)
213.97 m x 26.82 m x 7.92 m

Armament:
8 - 12.00" / 305 mm guns (4 Main turrets x 2 guns, 2 superfiring turrets)
Aft turrets separated by engine room
16 - 5.50" / 140 mm guns (16 2nd turrets x 1 guns)
4 - 3.00" / 76 mm QF guns
12 - 1.00" / 25 mm guns
Weight of broadside 8,303 lbs / 3,766 kg
2 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
Belt 10.00" / 254 mm, upper belt 6.00" / 152 mm, end belts 3.00" / 76 mm
Belts cover 100 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main turrets 10.00" / 254 mm, 2nd turrets 4.00" / 102 mm
QF gun shields 1.00" / 25 mm
Armour deck 2.00" / 51 mm, Conning tower 10.00" / 254 mm
Torpedo bulkhead 1.50" / 38 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 98,384 shp / 73,394 Kw = 28.09 kts
Range 9,000nm at 12.00 kts

Complement:
1,104 - 1,436

Cost:
£2.377 million / $9.509 million

Distribution of weights at normal displacement:
Armament: 1,038 tons, 3.6 %
Armour: 8,594 tons, 29.9 %
Belts: 3,384 tons, 11.8 %,
Armament: 2,677 tons, 9.3 %,
Armour Deck: 1,672 tons, 5.8 %
Conning Tower: 203 tons, 0.7 %,
Torpedo bulkhead: 658 tons, 2.3 %
Machinery: 4,472 tons, 15.5 %
Hull, fittings & equipment: 10,870 tons, 37.8 %
Fuel, ammunition & stores: 3,650 tons, 12.7 %
Miscellaneous weights: 150 tons, 0.5 %

Metacentric height 5.3

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.14
Shellfire needed to sink: 26,906 lbs / 12,204 Kg = 31.1 x 12.0 " / 305 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 3.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 50 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.44
Relative quality as seaboat: 1.03

Hull form characteristics:
Block coefficient: 0.627
Sharpness coefficient: 0.40
Hull speed coefficient 'M': 7.01
'Natural speed' for length: 26.50 kts
Power going to wave formation at top speed: 52 %
Trim: 48
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 104.2 %
Relative accommodation and working space: 155.9 %
(Average = 100%)
Displacement factor: 111 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.08
(Structure weight / hull surface area: 170 lbs / square foot or 831 Kg / square metre)
Relative longitudinal hull strength: 1.04
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment 1.29 ft)
Relative composite hull strength: 1.05

Calessus class BB's 1920/21

Calessus, Ophiuchus, Alioth, Etamin
Demensions 765/104/30
Armament: 10x15"(5x2), 14x5.5", 6x3", 12x1"
26.1 knots 43,980

Essentially enlarged versions of the Melampus class BB's, these ships mounted an additional twin 15" turret midships and also mounted 2 more 5.5" secondarys. All work on their design was abandoned due to the Cleito treaty.

Alioth class BC's 1915/16

Alioth, Etamin
Demensions: 785/96/29
Armament: 9x14"(3x3), 16x5.5", 8x3", 8x1"
4x18" torpedo tubes
28 knots 35,300 tons

These ships utilized the triple 14" turret used on the Tyrrhenia class BB's. Similar in many ways to the Vengeance class BC's who owe much of their design features to this design. The construction of these two ships was delayed by the prioritization of other projects, then by the news of the Battle of Jutland.
Ultimately they were cancelled and designers then focused on the NX-12 design which ultimately became the Vengeance class BC's.

Menestheus class Armored Cruisers

Three ships of an improved Lyra type were ordered to suplement the existing ships. The changes to the design included replacing the 6" secondary's with the new 5.5" mount and the addition of an additional underwater torpedo tube forward.

The design was scrapped in favor of the Azaes class BC design which was built to suplement the Arcturus class BC's in the fleet.

Basic stats: Armament: 10x9.2"(5x2), 12x5.5", 4x3", 8x.78", 4x18" torpedo tubes (underwater), 26 knots

Eclipse class light scout cruisers

Eclipse, Juno
Purchased by Argentina in 1933 and refited in Atlantean yards

As refit


Eclipse, Atlantis DL Light Cruiser laid down 1916

Displacement:
4,790 t light; 4,991 t standard; 5,228 t normal; 5,417 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
6 - 5.10" / 130 mm guns (4 mounts), 66.33lbs / 30.09kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 2 raised mounts
Aft Main mounts separated by engine room
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, 2 raised mounts
4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 536 lbs / 243 kg
Shells per gun, main battery: 300
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.00" / 25 mm 1.57" / 40 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 427 tons

Complement:
306 - 399

Cost:
£0.771 million / $3.084 million

Distribution of weights at normal displacement:
Armament: 67 tons, 1.3 %
Armour: 938 tons, 17.9 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 34 tons, 0.7 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,766 tons, 33.8 %
Hull, fittings & equipment: 1,979 tons, 37.9 %
Fuel, ammunition & stores: 438 tons, 8.4 %
Miscellaneous weights: 40 tons, 0.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,710 lbs / 2,136 Kg = 71.0 x 5.1 " / 130 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.7 ft / 0.8 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.4 %
- Above water (accommodation/working, high = better): 124.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 80 lbs/sq ft or 390 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.36
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

As built


Eclipse, Atlantis Light Cruiser laid down 1916

Displacement:
4,841 t light; 4,991 t standard; 5,228 t normal; 5,417 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
5 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1916 Model
Breech loading guns in deck mounts
on centreline, evenly spread, 1 raised mount
1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1916 Model
Anti-aircraft gun in deck mount
on centreline
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 506 lbs / 229 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 427 tons

Complement:
306 - 399

Cost:
£0.769 million / $3.075 million

Distribution of weights at normal displacement:
Armament: 63 tons, 1.2 %
Armour: 928 tons, 17.8 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 25 tons, 0.5 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,766 tons, 33.8 %
Hull, fittings & equipment: 2,034 tons, 38.9 %
Fuel, ammunition & stores: 386 tons, 7.4 %
Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,895 lbs / 2,220 Kg = 58.8 x 5.5 " / 140 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 2.8 ft / 0.9 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 120.1 %
- Above water (accommodation/working, high = better): 124.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 82 lbs/sq ft or 400 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.05
- Longitudinal: 1.46
- Overall: 1.08
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Forward class light scout cruisers

Forward, Fort
Purchased by Argentina in 1933 and refited in Atlantean yards

As refit


Forward, Atlantis DL Light Cruiser laid down 1916

Displacement:
4,790 t light; 4,991 t standard; 5,228 t normal; 5,417 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
6 - 5.10" / 130 mm guns (5 mounts), 66.33lbs / 30.09kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 1 raised mount
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
6 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 535 lbs / 243 kg
Shells per gun, main battery: 300
6 - 23.6" / 600 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.00" / 25 mm 1.57" / 40 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 427 tons

Complement:
306 - 399

Cost:
£0.771 million / $3.083 million

Distribution of weights at normal displacement:
Armament: 67 tons, 1.3 %
Armour: 938 tons, 17.9 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 34 tons, 0.7 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,766 tons, 33.8 %
Hull, fittings & equipment: 1,959 tons, 37.5 %
Fuel, ammunition & stores: 438 tons, 8.4 %
Miscellaneous weights: 60 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,670 lbs / 2,118 Kg = 70.4 x 5.1 " / 130 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.7 ft / 0.8 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.8 %
- Above water (accommodation/working, high = better): 126.5 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 79 lbs/sq ft or 386 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.35
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

As built


Forward, Atlantis Light Cruiser laid down 1916

Displacement:
4,841 t light; 4,991 t standard; 5,228 t normal; 5,417 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
5 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1916 Model
Breech loading guns in deck mounts
on centreline, evenly spread
1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1916 Model
Anti-aircraft gun in deck mount
on centreline
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 506 lbs / 229 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 427 tons

Complement:
306 - 399

Cost:
£0.769 million / $3.075 million

Distribution of weights at normal displacement:
Armament: 63 tons, 1.2 %
Armour: 928 tons, 17.8 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 25 tons, 0.5 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,766 tons, 33.8 %
Hull, fittings & equipment: 2,034 tons, 38.9 %
Fuel, ammunition & stores: 386 tons, 7.4 %
Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,900 lbs / 2,223 Kg = 58.9 x 5.5 " / 140 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 2.9 ft / 0.9 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 120.1 %
- Above water (accommodation/working, high = better): 133.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 82 lbs/sq ft or 400 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.05
- Longitudinal: 1.46
- Overall: 1.09
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Undaunted class light scout cruisers

Undaunted, Inconstant
sold to Colombia in 1932


Undaunted, Atlantis Light Cruiser laid down 1914

Displacement:
4,824 t light; 4,973 t standard; 5,228 t normal; 5,431 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
5 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1914 Model
Breech loading guns in deck mounts
on centreline, evenly spread
1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1914 Model
Anti-aircraft gun in deck mount
on centreline
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1914 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
6 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1914 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 505 lbs / 229 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes, 2 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 458 tons

Complement:
306 - 399

Cost:
£0.608 million / $2.431 million

Distribution of weights at normal displacement:
Armament: 63 tons, 1.2 %
Armour: 928 tons, 17.8 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 25 tons, 0.5 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,826 tons, 34.9 %
Hull, fittings & equipment: 1,957 tons, 37.4 %
Fuel, ammunition & stores: 404 tons, 7.7 %
Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,338 lbs / 1,968 Kg = 52.2 x 5.5 " / 140 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.9 ft / 0.9 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 128.1 %
- Above water (accommodation/working, high = better): 133.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 79 lbs/sq ft or 385 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.41
- Overall: 1.04
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Astraea class Canadian/Chilean (Ex-Atlantean) CL class

Astraea, Antrim sold to Chile in 1936

Adventure, Aurora, Achilles and Argyll sold to Canada 1932/33




[SIZE=3]Astraea-class, Atlantean/Chilean Light Antiaircraft Cruiser laid down 1915, Rebuilt 1937[/SIZE]

Displacement:
6,961 t light; 7,374 t standard; 8,015 t normal; 8,528 t full load

Dimensions: Length overall / water x beam x raught
579.23 ft / 575.00 ft x 56.00 ft x 18.00 ft (normal load)
176.55 m / 175.26 m x 17.07 m x 5.49 m

Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 67.03lbs / 30.40kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 5.12" / 130 mm guns (4x2 guns), 67.03lbs / 30.40kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.79" / 20.0 mm guns (6x2 guns), 0.24lbs / 0.11kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1,094 lbs / 496 kg
Shells per gun, main battery: 375
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 430.00 ft / 131.06 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 115 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 0.79" / 20 mm 1.18" / 30 mm
2nd: 1.57" / 40 mm 0.79" / 20 mm 1.18" / 30 mm
3rd: 0.59" / 15 mm - -
4th: 0.59" / 15 mm - -

- Armour deck: 1.18" / 30 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 83,485 shp / 62,280 Kw = 33.00 kts
Range 5,950nm at 15.00 kts
Bunker at max displacement = 1,153 tons

Complement:
423 - 550

Cost:
£0.993 million / $3.971 million

Distribution of weights at normal displacement:
Armament: 137 tons, 1.7 %
Armour: 1,237 tons, 15.4 %
- Belts: 661 tons, 8.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 64 tons, 0.8 %
- Armour Deck: 462 tons, 5.8 %
- Conning Tower: 51 tons, 0.6 %
Machinery: 2,314 tons, 28.9 %
Hull, fittings & equipment: 3,173 tons, 39.6 %
Fuel, ammunition & stores: 1,054 tons, 13.2 %
Miscellaneous weights: 100 tons, 1.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,381 lbs / 3,802 Kg = 125.0 x 5.1 " / 130 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 2.7 ft / 0.8 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.484
Length to Beam Ratio: 10.27 : 1
'Natural speed' for length: 23.98 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 68
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (65 %): 21.00 ft / 6.40 m (13.00 ft / 3.96 m aft of break)
- Quarterdeck (15 %): 13.00 ft / 3.96 m
- Stern: 13.00 ft / 3.96 m
- Average freeboard: 18.44 ft / 5.62 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 110.6 %
- Above water (accommodation/working, high = better): 131.2 %
Waterplane Area: 21,147 Square feet or 1,965 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 94 lbs/sq ft or 459 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.27
- Overall: 1.00
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

Breakdown of Excess Weights:
Air search radar - 20 tons
Surface search radar - 20 tons
Extra AA ammo - 20 tons
Air conditioning/Heating - 5 tons
Torpedo reloads - 30 tons
Crew comforts - 5 tons

Ships in Class:
- Astraea (CL-10) - 1915/1937
- Tierra del Fuego (CL-11) - 1915/1937

Canadian Argyle Class CL conversion


Argyll class CL's, laid down 1915

Adventure, Aurora, Achilles and Argyll sold to Canada 1932/33


Argyll, Enter country Enter ship type laid down 1915

Displacement:
7,251 t light; 7,479 t standard; 8,015 t normal; 8,444 t full load

Dimensions: Length overall / water x beam x draught
578.88 ft / 575.00 ft x 56.00 ft x 18.00 ft (normal load)
176.44 m / 175.26 m x 17.07 m x 5.49 m

Armament:
4 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1915 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread, 1 raised mount
4 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1915 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1915 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1915 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 724 lbs / 328 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 410.00 ft / 124.97 m 12.00 ft / 3.66 m
Ends: 1.50" / 38 mm 160.00 ft / 48.77 m 8.00 ft / 2.44 m
5.00 ft / 1.52 m Unarmoured ends
Upper: 0.78" / 20 mm 200.00 ft / 60.96 m 0.00 ft / 0.00 m
Main Belt covers 110 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 1.18" / 30 mm, Conning tower: 5.90" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 64,871 shp / 48,394 Kw = 31.00 kts
Range 5,600nm at 12.00 kts
Bunker at max displacement = 965 tons

Complement:
423 - 550

Cost:
£0.980 million / $3.920 million

Distribution of weights at normal displacement:
Armament: 90 tons, 1.1 %
Armour: 1,238 tons, 15.4 %
- Belts: 705 tons, 8.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 20 tons, 0.2 %
- Armour Deck: 462 tons, 5.8 %
- Conning Tower: 51 tons, 0.6 %
Machinery: 2,457 tons, 30.7 %
Hull, fittings & equipment: 3,416 tons, 42.6 %
Fuel, ammunition & stores: 764 tons, 9.5 %
Miscellaneous weights: 50 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,625 lbs / 3,912 Kg = 103.7 x 5.5 " / 140 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 3.2 ft / 1.0 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.10

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.484
Length to Beam Ratio: 10.27 : 1
'Natural speed' for length: 23.98 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 64
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: 22.00 ft / 6.71 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (65 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.66 ft / 5.08 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.2 %
- Above water (accommodation/working, high = better): 133.6 %
Waterplane Area: 21,147 Square feet or 1,965 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 104 lbs/sq ft or 508 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.25
- Longitudinal: 1.28
- Overall: 1.25
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

Nereus class CL's

Callosus class CL's

Thrasius class CL's 1912

Thrasius (sold to Mexico), Patroclius (sold to Mexico), Valerius (sold to Australia, then to Mexico), Mazentius (sold to Australia, then to Mexico), Accrisius (sold to Mexico) and Favonius (sold to Mexico)


Thrasius, Atlantis Light Cruiser laid down 1912 (Engine 1917)

Displacement:
4,570 t light; 4,758 t standard; 4,986 t normal; 5,169 t full load

Dimensions: Length overall / water x beam x draught
459.70 ft / 456.00 ft x 52.00 ft x 16.00 ft (normal load)
140.12 m / 138.99 m x 15.85 m x 4.88 m

Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
6 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
Quick firing guns in deck mounts
on side, evenly spread
10 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1912 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 923 lbs / 419 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 310.00 ft / 94.49 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 146.00 ft / 44.50 m 8.00 ft / 2.44 m
Upper: 1.18" / 30 mm 160.00 ft / 48.77 m 8.00 ft / 2.44 m
Main Belt covers 105 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 1.18" / 30 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 4 shafts, 35,598 shp / 26,556 Kw = 28.00 kts
Range 5,000nm at 10.00 kts
Bunker at max displacement = 412 tons

Complement:
296 - 385

Cost:
£0.440 million / $1.758 million

Distribution of weights at normal displacement:
Armament: 115 tons, 2.3 %
Armour: 1,011 tons, 20.3 %
- Belts: 628 tons, 12.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 11 tons, 0.2 %
- Armour Deck: 333 tons, 6.7 %
- Conning Tower: 38 tons, 0.8 %
Machinery: 1,305 tons, 26.2 %
Hull, fittings & equipment: 2,089 tons, 41.9 %
Fuel, ammunition & stores: 416 tons, 8.3 %
Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,516 lbs / 2,956 Kg = 60.3 x 6.0 " / 152 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 2.8 ft / 0.9 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.460
Length to Beam Ratio: 8.77 : 1
'Natural speed' for length: 21.35 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 57
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: 21.00 ft / 6.40 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (70 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 17.08 ft / 5.21 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 104.3 %
- Above water (accommodation/working, high = better): 153.5 %
Waterplane Area: 15,251 Square feet or 1,417 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 86 lbs/sq ft or 422 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.06
- Longitudinal: 1.80
- Overall: 1.12
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
Good seaboat, rides out heavy weather easily

Zerberus concept drawing

(ex-Uriania)
(ex-Uphold)

? (ex-Admiralty) class DD
Chilean (Atlantis) Tender (Destroyer) laid down 1916

Displacement:
1,027 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 - 3.00" / 76.2 mm guns (1x2 guns), 13.50lbs / 6.12kg shells, 1928 Model
Quick firing guns in a deck mount with hoist
on centreline forward
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.54lbs / 0.70kg shells, 1928 Model
Anti-aircraft guns in deck mount
on centreline aft
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.54lbs / 0.70kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all forward
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side
Weight of broadside 37 lbs / 17 kg
Shells per gun, main battery: 350

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

- Conning tower: 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 7,000 shp / 5,222 Kw = 22.39 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 331 tons

Complement:
104 - 136

Cost:
£0.125 million / $0.500 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.4 %
Armour: 6 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 2 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.3 %
Machinery: 261 tons, 21.0 %
Hull, fittings & equipment: 556 tons, 44.7 %
Fuel, ammunition & stores: 217 tons, 17.4 %
Miscellaneous weights: 200 tons, 16.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,864 lbs / 846 Kg = 138.1 x 3.0 " / 76 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.0 ft / 0.3 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.89

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: 50 %
Trim (Max stability = 0, Max steadiness = 100): 38
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): 89.4 %
- Above water (accommodation/working, high = better): 121.6 %
Waterplane Area: 5,913 Square feet or 549 Square metres
Displacement factor (Displacement / loading): 163 %
Structure weight / hull surface area: 49 lbs/sq ft or 240 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.05
- Longitudinal: 2.71
- Overall: 1.15
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

110 tons for fuel (enough for 6 subchasers)
45 tons for depth charges
20 tons for spare parts
15 tons for 3" ammo
5tons for 37mm ammo (6,200 rounds)
5 tons for 12.7mm ammo

Praia class Float Plane Tender

Michimalonco (ex-Praia)
Lautaro (ex-Mindelo)


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

SC-1 through SC-12
(Atlantis Type 1 Subchaser)


Chilean sub chaser/patrol vessel laid down 1923 (Atlantis built)

Displacement:
111 t light; 115 t standard; 122 t normal; 128 t full load
Loading submergence 33 tons/feet

Dimensions:
110.00 ft x 15.00 ft x 4.50 ft (normal load)
33.53 m x 4.57 m x 1.37 m

Armament:
1 - 3.00" / 76 mm gun
2 - 1.57" / 40 mm AA guns
4 - 1.00" / 25 mm guns
Weight of broadside 19 lbs / 9 kg

Armour:
Main gun shield 1.00" / 25 mm

Machinery:
Petrol Internal combustion motors,
Direct drive, 1 shaft, 1,254 shp / 936 Kw = 18.00 kts
Range 1,000nm at 12.00 kts

Complement:
18 - 23

Cost:
£0.034 million / $0.137 million

Distribution of weights at normal displacement:
Armament: 2 tons, 2.0 %
Armour: 1 tons, 0.5 %
Belts: 0 tons, 0.0 %, Armament: 1 tons, 0.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 42 tons, 34.3 %
Hull, fittings & equipment: 56 tons, 45.6 %
Fuel, ammunition & stores: 12 tons, 9.4 %
Miscellaneous weights: 10 tons, 8.2 %

Metacentric height 0.3

Remarks:
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Caution: Lacks seaworthiness - very limited seakeeping ability

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.04
Shellfire needed to sink: 93 lbs / 42 Kg = 6.9 x 3.0 " / 76 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 42 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.23
Relative quality as seaboat: 0.59

Hull form characteristics:
Block coefficient: 0.577
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.77
'Natural speed' for length: 10.49 kts
Power going to wave formation at top speed: 72 %
Trim: 60
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 135.0 %
Relative accommodation and working space: 78.5 %
(Average = 100%)
Displacement factor: 107 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.05
(Structure weight / hull surface area: 29 lbs / square foot or 140 Kg / square metre)
Relative longitudinal hull strength: 3.63
(for 6.50 ft / 1.98 m average freeboard, freeboard adjustment 0.22 ft)
Relative composite hull strength: 1.19

B class preposed 1933 refit, cancelled

B class, Atlantis Destroyer laid down 1917

Displacement:
1,069 t light; 1,136 t standard; 1,379 t normal; 1,574 t full load

Dimensions: Length overall / water x beam x draught
330.63 ft / 325.00 ft x 32.00 ft x 11.00 ft (normal load)
100.78 m / 99.06 m x 9.75 m x 3.35 m

Armament:
4 - 5.10" / 130 mm guns in single mounts, 66.33lbs / 30.09kg shells, 1933 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
6 - 1.58" / 40.0 mm guns (3x2 guns), 1.95lbs / 0.88kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on centreline ends, majority forward, 2 raised mounts - superfiring
8 - 0.79" / 20.0 mm guns (2x4 guns), 0.24lbs / 0.11kg shells, 1933 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1933 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 279 lbs / 127 kg
Shells per gun, main battery: 250

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 0.79" / 20 mm 1.00" / 25 mm

- Conning tower: 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 8,500 shp / 6,341 Kw = 23.29 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 437 tons

Complement:
113 - 147

Cost:
£0.201 million / $0.803 million

Distribution of weights at normal displacement:
Armament: 35 tons, 2.5 %
Armour: 22 tons, 1.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 4 tons, 0.3 %
Machinery: 312 tons, 22.6 %
Hull, fittings & equipment: 666 tons, 48.3 %
Fuel, ammunition & stores: 311 tons, 22.5 %
Miscellaneous weights: 35 tons, 2.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,045 lbs / 928 Kg = 30.8 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 1.4 ft / 0.4 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.422
Length to Beam Ratio: 10.16 : 1
'Natural speed' for length: 18.03 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (30 %): 20.00 ft / 6.10 m
- Mid (40 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (10 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 14.12 ft / 4.30 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.2 %
- Above water (accommodation/working, high = better): 127.7 %
Waterplane Area: 6,493 Square feet or 603 Square metres
Displacement factor (Displacement / loading): 144 %
Structure weight / hull surface area: 51 lbs/sq ft or 250 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 3.19
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

14 tons for 56 depth charges
9 tons for sonar
4 tons for anti sub equipment
8 tons for future growth