WesWorld

Summary of Aircraft Carriers and Seaplane carriers in Greek service.

[size=2]Astraios Class Training Carrier[/size]
[list]
AC-6 Astraios [size=1](refitted) 01/Jul/31 to 12/Oct/33[/size]

Displacement:
12,000t standard (11,998t actual)
Dimensions:
506ft x 68ft x 27ft
Machinery:
1-shaft VTE 16.0kts Range 3900@12kts
Armament:
20 Aircraft
[/list]
[size=2]Arkadia Class Aircraft Carrier[/size]
[list]
AC-7 Arkadia [size=1]Laid Down 08/Sep/31 Entered service 24/Mar/34[/size]

Displacement:
15,000t standard (15,963t actual)
Dimensions:
664ft x 76ft x 26ft
Machinery:
4-shaft Turbine 31.5kts Range 12000@15kts
Armour:
Belt 4.5", Deck 3.2"
Armament:
16-1.57mm (8x2), 16-0.5" (8x2) 54 Aircraft
[/list]
[size=2]Thermopylae Class Aircraft Carrier[/size]
[list]
AC-9 Thermopylae [size=1]Rebuild (ex B-4) (converted to aircraft carrier 01/Nov/36 to 11/Aug/38)[/size]

Displacement:
29,221t standard
Dimensions:
700ft x 105ft x 26ft
Machinery:
4-shaft Turbo-electric drive 30kts Range 8500@12kts
Armour:
Belt 6", Deck 4"
Armament:
16-5"AA (8x2), 24-1.57mm (12x2), 36-0.5" (36x1) 90 Aircraft

[/list]
[size=3]FORMER AIRCRAFT CARRIERS[/size]

[size=2]Pericles Class Aircraft Carrier[/size]
[list]
AC-1 Pericles [size=1]Laid Down 1-Jan-03 Entered service 21/Nov/04 Converted 1920 - Scrapped[/size]
[/list]
[size=2]Ouranos Class Seaplane Carrier[/size]
[list]
AC-3 Ouranos [size=1]Laid Down 01/Jan/25 Entered service 15/Apr/27 (converted to aircraft carrier 01/Jul/35 to 30/Apr/37)[/size]
AC-4 Thaumas [size=1]Laid Down 01/Mar/28 Entered service 13/Jun/30 (converted to aircraft carrier 01/Jul/35 to 30/Apr/37)[/size]
[/list]
[size=2]Anatolia Class Aircraft Carrier[/size]
[list]
AC-2 Anatoli [size=1]Laid Down 1-Jan-25 Entered service 09/Jun/27 Refit 1-Jul-40 to 30-Jun-41 Sold to Brazil Q1/42[/size]

Displacement:
14,999t standard
Dimensions:
664ft x 78ft x 27ft
Machinery:
4-shaft Turbine 30.5kts Range 8500@15kts
Armour:
Belt 6", Deck 3"
Armament:
24-1.57mm (12x2), 8-0.5" (8x1) 36 Aircraft
[/list]
[size=2]Ouranos Class Aircraft Carrier[/size]
[list]
AC-3 Ouranos [size=1]Laid Down 01/Jan/25 Entered service 15/Apr/27 (converted to aircraft carrier 01/Jul/35 to 30/Apr/37) Sold to France Q1/42[/size]
AC-4 Thaumas [size=1]Laid Down 01/Mar/28 Entered service 13/Jun/30 (converted to aircraft carrier 01/Jul/35 to 30/Apr/37) Sold to Brazil Q2/42[/size]
AC-8 Promethios [size=1]Laid Down 18/Sep/28 Entered service 14/Apr/30 (converted to aircraft carrier 01/Oct/37 to 01/Aug/39) Sold to Brazil Q3/42[/size]

Displacement:
14,999t standard
Dimensions:
664ft x 78ft x 27ft
Machinery:
4-shaft Turbine 30.5kts Range 8500@15kts
Armour:
Belt 6", Deck 3"
Armament:
24-1.57mm (12x2), 8-0.5" (8x1) 36 Aircraft
[/list]

[size=2]RHN AC-2 Anatoli Class, Greek Aircraft Carrier laid down 1925[/size]

[list]
AC-2 Anatoli [size=1]Laid Down 1-Jan-25 Entered service 09/Jun/27 Sold to Brazil Q1/42[/size]


Anatolia as completed.

Two seaplane carriers and a repair ship were built to the same hull and machinery as the Anatolia and were converted to carriers from 1935.

Displacement:
14,664 t light; 14,999 t standard; 16,550 t normal; 17,725 t full load
Loading submergence 816 tons/feet

Dimensions:
664.00 ft x 76.80 ft x 27.00 ft (normal load)
202.39 m x 23.41 m x 8.23 m
Armament: 24 - 1.57" / 40 mm guns8 - 0.50" / 13 mm AA guns
Weight of broadside 47 lbs / 21 kg
Armour: Belt 6.00" / 152 mm, ends unarmoured
Belts cover 87 % of normal area
Armour deck 3.00" / 76 mm Machinery: Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 89,467 shp / 66,743 Kw = 30.50 kts
Range 8,500nm at 15.00 kts

Complement:
729 - 948

Cost:
£3.027 million / $12.107 million

Distribution of weights at normal Displacement: Armament: 6 tons, 0.0 % Armour: 2,570 tons, 15.5 %
Belts: 986 tons, 6.0 %, Armament: 0 tons, 0.0 %, Armour Deck: 1,584 tons, 9.6 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 % Machinery: 2,905 tons, 17.6 %
Hull, fittings & equipment: 4,783 tons, 28.9 %
Fuel, ammunition & stores: 1,886 tons, 11.4 %
Miscellaneous weights: 4,400 tons, 26.6 %

Metacentric height 3.6

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.03
Shellfire needed to sink: 18,315 lbs / 8,308 Kg = 169.6 x 6 " / 152 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 2.3
(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: 0.00
Relative quality as seaboat: 1.27

Hull form characteristics:
Block coefficient: 0.421
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 7.97
'Natural speed' for length: 25.77 kts
Power going to wave formation at top speed: 50 %
Trim: 55
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 86.7 %
Relative accommodation and working space: 134.3 %
(Average = 100%)
Displacement factor: 129 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.99
(Structure weight / hull surface area: 103 lbs / square foot or 501 Kg / square metre)
Relative longitudinal hull strength: 1.13
(for 18.00 ft / 5.49 m average freeboard, freeboard adjustment 1.25 ft)
Relative composite hull strength: 1.00

[/list]


[list]
AC-3 Ouranos [size=1]Laid Down 01/Jan/25 Entered service 15/Apr/27 (converted to aircraft carrier 01/Jul/35 to 30/Apr/37) Sold to France Q1/42[/size]
AC-4 Thaumas [size=1]Laid Down 01/Mar/28 Entered service 13/Jun/30 (converted to aircraft carrier 01/Jul/35 to 30/Apr/37) Sold to Brazil Q2/42[/size]
AC-8 Promethios (ex AR-1)[size=1]Laid Down 18/Sep/28 Entered service 14/Apr/30 (converted to aircraft carrier 01/Oct/37 to 01/Aug/39) Sold to Brazil Q3/42[/size]


The three Ouranos class ships were rebuilt along the lines of the Arkadia but incorporate roller doors for the hangar deck rather than the sliding doors in earlier carriers.

With the completion of the shadow program, Greeces carrier strength will go from the 30,000 tons of the Clieto Treaty to 105,000 tons (5x15,000ton carriers and 1x30,000 ton carrier) by 1939.
[/list]

[size=2]Arkadia Class Aircraft Carrier[/size]
[list]
AC-7 Arkadia [size=1]Laid Down 08/Sep/31 Entered service 24/Mar/34[/size]



Arkadia as complete 1934.

Arkadia incorporated all the lessons learned from the construction and operation of Anatolia in the late 1920's. The new design included a flush deck with adequate arrester gear and catapults rather than the arrester and launching ramps of the Anatolia.

Displacement:
15,572 t light; 15,963 t standard; 17,994 t normal; 19,619 t full load

Dimensions: Length overall / water x beam x draught
664.00 ft / 664.00 ft x 76.00 ft x 26.00 ft (normal load)
202.39 m / 202.39 m x 23.16 m x 7.92 m

Armament:
36 Fairey Firefly Fighter/Bombers in 2 squadrons of 18
18 Fairey Barracuda Bomber/Scouts in 1 squadron of 18
16 - 1.57" / 40.0 mm guns (8x2 guns), 1.95lbs / 0.89kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 35 lbs / 16 kg
Shells per gun, main battery: 1,400

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.50" / 114 mm 462.00 ft / 140.82 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 107 % of normal length

- Armour deck: 3.20" / 81 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 94,721 shp / 70,662 Kw = 31.50 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 3,656 tons

Complement:
776 - 1,009

Cost:
£4.273 million / $17.093 million

Distribution of weights at normal displacement:
Armament: 4 tons, 0.0 %
Armour: 2,897 tons, 16.1 %
- Belts: 865 tons, 4.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 2,032 tons, 11.3 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2,796 tons, 15.5 %
Hull, fittings & equipment: 5,375 tons, 29.9 %
Fuel, ammunition & stores: 2,422 tons, 13.5 %
Miscellaneous weights: 4,500 tons, 25.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,432 lbs / 11,989 Kg = 13,535.8 x 1.6 " / 40 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 3.8 ft / 1.1 m
Roll period: 16.5 seconds
Steadiness - As gun platform (Average = 50 %): 63 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.27

Hull form characteristics:
Hull has low forecastle, rise forward of midbreak
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 8.74 : 1
'Natural speed' for length: 29.80 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 19.00 ft / 5.79 m (26.00 ft / 7.92 m aft of break)
- Mid (77 %): 22.00 ft / 6.71 m (15.00 ft / 4.57 m aft of break)
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 21.49 ft / 6.55 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.7 %
- Above water (accommodation/working, high = better): 192.9 %
Waterplane Area: 34,327 Square feet or 3,189 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 103 lbs/sq ft or 505 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.30
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily[/list]

[size=2]Thermopylae Class Aircraft Carrier[/size]
[list]
AC-9 Thermopylae [size=1]Rebuild (ex B-4) (converted to aircraft carrier 01/Nov/36 to 11/Aug/38)[/size]


Laid down as an improved Salamis class battleship but with new Turbo Electric propultion as on the US trend at the time. Thermopylae fell foul of the Clieto Treaty and was converted to a target ship. The engines had been fitted but the number of boilers required for her designed speed had not. She was fitted with light armour and retained in a state that could be converted to a carrier at a later date.

In 1934 she was refitted with her boilers and some lower deck fixtures on the cover story that she was to be used for electricity generation at Souda Bay Naval yard. Full completion as a carrier began in 1936.

Displacement:
28,491 t light; 29,221 t standard; 30,576 t normal; 31,660 t full load

Dimensions:
Length overall / water x beam x draught
712.50 ft / 700.00 ft x 105.00 ft x 26.00 ft (normal load)
217.17 m / 213.36 m x 32.00 m x 7.92 m

Armament:
54 Fairey Firefly Fighter/Bombers in 3 squadrons of 18
18 Fairey Barracuda Bomber/Scouts in 1 squadron of 18
18 Curtiss Hawk III Dive Bombers in 1 squadron of 18
16 - 5.00" / 127 mm guns (8x2 guns), 59.90lbs / 27.17kg shells, 1934 Model
Dual purpose guns in turrets (on barbettes)
on side ends, evenly spread, all raised mounts - superfiring
24 - 1.57" / 40.0 mm guns (12x2 guns), 2.14lbs / 0.97kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
36 - 0.79" / 20.0 mm guns (18x2 guns), 0.27lbs / 0.12kg shells, 1934 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,019 lbs / 462 kg
Shells per gun, main battery: 200

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 455.00 ft / 138.68 m 12.30 ft / 3.75 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Torpedo Bulkhead:
1.00" / 25 mm 455.00 ft / 138.68 m 26.79 ft / 8.17 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm

- Armour deck: 4.00" / 102 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 133,157 shp / 99,335 Kw = 30.00 kts
Range 8,500nm at 12.00 kts
Bunker at max displacement = 2,440 tons

Complement:
1,155 - 1,502

Cost:
£3.887 million / $15.546 million

Distribution of weights at normal displacement:
Armament: 132 tons, 0.4 %
Armour: 6,078 tons, 19.9 %
- Belts: 1,459 tons, 4.8 %
- Torpedo bulkhead: 451 tons, 1.5 %
- Armament: 336 tons, 1.1 %
- Armour Deck: 3,832 tons, 12.5 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 3,831 tons, 12.5 %
Hull, fittings & equipment: 9,250 tons, 30.3 %
Fuel, ammunition & stores: 2,085 tons, 6.8 %
Miscellaneous weights: 9,200 tons, 30.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
45,578 lbs / 20,674 Kg = 729.3 x 5.0 " / 127 mm shells or 6.5 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 6.3 ft / 1.9 m
Roll period: 17.5 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.560
Length to Beam Ratio: 6.67 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (20 %): 26.50 ft / 8.08 m
- Mid (50 %): 25.00 ft / 7.62 m
- Quarterdeck (15 %): 24.00 ft / 7.32 m
- Stern: 23.00 ft / 7.01 m
- Average freeboard: 25.25 ft / 7.69 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.7 %
- Above water (accommodation/working, high = better): 214.1 %
Waterplane Area: 51,778 Square feet or 4,810 Square metres
Displacement factor (Displacement / loading): 127 %
Structure weight / hull surface area: 130 lbs/sq ft or 635 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.32
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily[/list]

[size=2]Astraios Class Training Carrier[/size]
[list]
AC-6 Astraios [size=1](refitted) 01/Jul/31 to 12/Oct/33[/size]

Astraios as refitted 1933.
[/list]
Astraios, Greek Aircraft Carrier (Training) laid down 1917 (Engine 1931)

Displacement:
11,680 t light; 11,998 t standard; 15,921 t normal; 19,060 t full load

Dimensions: Length overall / water x beam x draught
521.33 ft / 505.50 ft x 68.30 ft x 26.90 ft (normal load)
158.90 m / 154.08 m x 20.82 m x 8.20 m

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Direct drive, 1 shaft, 9,000 ihp / 6,714 Kw = 16.03 kts
Range 46,845nm at 10.00 kts
*Actual range = 3,883nm at 12 kts
Bunker at max displacement = 7,061 tons
*Actual Bunker = 1000 tons*

Complement:
708 - 921

Cost:
£0.873 million / $3.492 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 510 tons, 3.2 %
Hull, fittings & equipment: 10,670 tons, 67.0 %
Fuel, ammunition & stores: 4,241 tons, 26.6 %
Miscellaneous weights: 500 tons, 3.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
105,222 lbs / 47,728 Kg = 974.3 x 6 " / 152 mm shells or 17.0 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.5 ft / 1.1 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak, raised quarterdeck
Block coefficient: 0.600
Length to Beam Ratio: 7.40 : 1
'Natural speed' for length: 22.48 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 6.40 degrees
Stern overhang: 11.72 ft / 3.57 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 36.60 ft / 11.16 m
- Forecastle (12 %): 28.30 ft / 8.63 m (25.50 ft / 7.77 m aft of break)
- Mid (45 %): 25.50 ft / 7.77 m (14.50 ft / 4.42 m aft of break)
- Quarterdeck (36 %): 24.80 ft / 7.56 m (14.50 ft / 4.42 m before break)
- Stern: 26.90 ft / 8.20 m
- Average freeboard: 24.33 ft / 7.42 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 15.7 %
- Above water (accommodation/working, high = better): 143.2 %
Waterplane Area: 24,700 Square feet or 2,295 Square metres
Displacement factor (Displacement / loading): 1,000 %
Structure weight / hull surface area: 252 lbs/sq ft or 1,231 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.61
- Longitudinal: 6.24
- Overall: 2.85
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

6061t bunkerage = former oil storage capacity, now filled with water, low stowed cargo, avgas, and misc.