WesWorld

Port Moresby class Aviation Cruiser
- CVP Port Moresby (1931)
- CVP Port Headland
- CVP Port Macquarie

Erebus class Aviation Cruiser
- CVP Erebrus
- CVP Terror

Ballarat class Aviation Cruiser
- CVP Ballarat
- CVP Bathurst

HMAS Port Moresby
HMAS Port Headland
HMAS Port Macquarie

Port Moresby class, Australia Seaplane Cruiser laid down 1932

Displacement:
5,766 t light; 5,998 t standard; 7,390 t normal; 8,503 t full load

Dimensions: Length overall / water x beam x draught
561.19 ft / 550.00 ft x 55.00 ft x 19.00 ft (normal load)
171.05 m / 167.64 m x 16.76 m x 5.79 m

Armament:
6 - 6.00" / 152 mm guns (2x3 guns), 108.00lbs / 48.99kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
8 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1932 Model
Dual purpose guns in deck mounts
on side, evenly spread, 2 raised mounts
12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.89kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 932 lbs / 423 kg
Shells per gun, main battery: 150
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.90" / 74 mm 350.00 ft / 106.68 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 98 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.90" / 74 mm 1.20" / 30 mm 2.00" / 51 mm
2nd: 1.20" / 30 mm - -

- Armour deck: 1.20" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 60,885 shp / 45,420 Kw = 32.00 kts
Range 14,150nm at 15.00 kts
Bunker at max displacement = 2,504 tons

Complement:
398 - 518

Cost:
£2.506 million / $10.023 million

Distribution of weights at normal displacement:
Armament: 117 tons, 1.6 %
Armour: 943 tons, 12.8 %
- Belts: 380 tons, 5.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 118 tons, 1.6 %
- Armour Deck: 445 tons, 6.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,797 tons, 24.3 %
Hull, fittings & equipment: 2,669 tons, 36.1 %
Fuel, ammunition & stores: 1,624 tons, 22.0 %
Miscellaneous weights: 240 tons, 3.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,585 lbs / 4,348 Kg = 88.8 x 6.0 " / 152 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.9 ft / 0.9 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 26.93 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 25.00 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 (30 %): 20.00 ft / 6.10 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (20 %): 15.00 ft / 4.57 m (19.00 ft / 5.79 m before break)
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 19.08 ft / 5.82 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.2 %
- Above water (accommodation/working, high = better): 133.8 %
Waterplane Area: 20,044 Square feet or 1,862 Square metres
Displacement factor (Displacement / loading): 129 %
Structure weight / hull surface area: 82 lbs/sq ft or 398 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 1.46
- Overall: 0.90
Caution: Hull subject to strain in open-sea
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

HMAS Ballarat
HMAS Bathurst

Ballarat class, Australia Seaplane Escort Cruiser laid down 1932

Displacement:
3,605 t light; 3,790 t standard; 5,014 t normal; 5,994 t full load

Dimensions: Length overall / water x beam x draught
509.79 ft / 500.00 ft x 52.00 ft x 15.00 ft (normal load)
155.38 m / 152.40 m x 15.85 m x 4.57 m

Armament:
6 - 6.00" / 152 mm guns (2x3 guns), 108.00lbs / 48.99kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
8 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1932 Model
Breech loading guns in deck mounts
on side, evenly spread, 4 raised mounts
12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.88kg shells, 1932 Model
Breech loading guns in deck mounts
on centreline, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1932 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 932 lbs / 423 kg
Shells per gun, main battery: 150
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.90" / 74 mm 240.00 ft / 73.15 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 74 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.90" / 74 mm 1.20" / 30 mm 2.00" / 51 mm
2nd: 1.20" / 30 mm - -

- Armour deck: 1.20" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 19,343 shp / 14,430 Kw = 24.20 kts
Range 15,000nm at 15.00 kts
Bunker at max displacement = 2,203 tons

Complement:
297 - 387

Cost:
£1.382 million / $5.527 million

Distribution of weights at normal displacement:
Armament: 117 tons, 2.3 %
Armour: 744 tons, 14.8 %
- Belts: 275 tons, 5.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 101 tons, 2.0 %
- Armour Deck: 368 tons, 7.3 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 571 tons, 11.4 %
Hull, fittings & equipment: 1,924 tons, 38.4 %
Fuel, ammunition & stores: 1,409 tons, 28.1 %
Miscellaneous weights: 250 tons, 5.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10,403 lbs / 4,719 Kg = 96.3 x 6.0 " / 152 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 3.2 ft / 1.0 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.450
Length to Beam Ratio: 9.62 : 1
'Natural speed' for length: 22.36 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 25.00 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 %): 14.00 ft / 4.27 m
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 12.00 ft / 3.66 m (14.00 ft / 4.27 m before break)
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 14.26 ft / 4.35 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 61.4 %
- Above water (accommodation/working, high = better): 101.6 %
Waterplane Area: 16,585 Square feet or 1,541 Square metres
Displacement factor (Displacement / loading): 163 %
Structure weight / hull surface area: 78 lbs/sq ft or 381 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.07
- Overall: 0.95
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Two of these are planned as flagships for escort squadrons and for amphibious groups. They will have significant aircraft facilities aft, as well as flag facilities and communication equipment. (report needs to be fixed to account for 510lbs shells)


HMAS Erebrus/Terror, Australia Escort Cruiser laid down 1943

Displacement:
7,002 t light; 7,408 t standard; 8,375 t normal; 9,148 t full load

Dimensions: Length overall / water x beam x draught
545.98 ft / 540.00 ft x 59.00 ft x 18.40 ft (normal load)
166.42 m / 164.59 m x 17.98 m x 5.61 m

Armament:
6 - 9.20" / 234 mm guns (2x3 guns), 389.34lbs / 176.60kg shells, 1943 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
10 - 4.70" / 119 mm guns (5x2 guns), 51.91lbs / 23.55kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, 1 raised mount
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.89kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
12 - 0.79" / 20.0 mm guns (6x2 guns), 0.24lbs / 0.11kg shells, 1943 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 2,889 lbs / 1,311 kg
Shells per gun, main battery: 142
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 240.00 ft / 73.15 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 68 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 2.00" / 51 mm 5.00" / 127 mm
2nd: 1.20" / 30 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 5.00" / 127 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 4 shafts, 23,574 shp / 17,586 Kw = 24.20 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 1,740 tons

Complement:
437 - 569

Cost:
£4.148 million / $16.591 million

Distribution of weights at normal displacement:
Armament: 361 tons, 4.3 %
Armour: 1,697 tons, 20.3 %
- Belts: 486 tons, 5.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 350 tons, 4.2 %
- Armour Deck: 817 tons, 9.8 %
- Conning Tower: 44 tons, 0.5 %
Machinery: 609 tons, 7.3 %
Hull, fittings & equipment: 3,795 tons, 45.3 %
Fuel, ammunition & stores: 1,373 tons, 16.4 %
Miscellaneous weights: 540 tons, 6.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,344 lbs / 6,960 Kg = 39.4 x 9.2 " / 234 mm shells or 2.5 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.6 ft / 0.8 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.91
Seaboat quality (Average = 1.00): 1.60

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 26.70 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 9.00 degrees
Stern overhang: 2.50 ft / 0.76 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (30 %): 17.00 ft / 5.18 m
- Mid (50 %): 17.00 ft / 5.18 m
- Quarterdeck (20 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 17.60 ft / 5.36 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64.6 %
- Above water (accommodation/working, high = better): 142.3 %
Waterplane Area: 22,075 Square feet or 2,051 Square metres
Displacement factor (Displacement / loading): 132 %
Structure weight / hull surface area: 115 lbs/sq ft or 562 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.56
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather