WesWorld

Active Light Cruisers of the Marinha Imperial

Sagitério Class
- MIBN Sagitério
- MIBN Piqueiro
- MIBN Esgrimsta
- MIBN Mosqueteiro

Almirante Barroso Class
- MIBN Almirante Barroso
- MIBN Almirante Tamandaré
- MIBN Almirante Abreu

Almirante Saldanha Class
- MIBN Almirante Saldanha

Bahia Class
All retired

Amazonas Class
All retired

Bahia Class
- MIBN Bahia

Sagitério Class, Brazilian Light Cruiser laid down 1934

Displacement:
9,924 t light; 10,322 t standard; 11,518 t normal; 12,474 t full load

Dimensions: Length overall / water x beam x draught
610.37 ft / 600.00 ft x 68.60 ft x 20.75 ft (normal load)
186.04 m / 182.88 m x 20.91 m x 6.32 m

Armament:
9 - 6.00" / 152 mm guns (3x3 guns), 108.00lbs / 48.99kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1934 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.32lbs / 0.60kg shells, 1934 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.54" / 13.7 mm guns (4x2 guns), 0.08lbs / 0.04kg shells, 1934 Model
Breech loading guns in deck mounts
on side, evenly spread

Weight of broadside 1,405 lbs / 637 kg
Shells per gun, main battery: 200

8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 400.00 ft / 121.92 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 103 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 3.00" / 76 mm 5.00" / 127 mm
2nd: 2.00" / 51 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 4.00" / 102 mm, Conning tower: 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 66,000 shp / 49,236 Kw = 30.56 kts
Range 15,000nm at 12.00 kts (Bunkerage = 2,153 tons)

Complement:
555 - 722

Cost:
£3.734 million / $14.937 million

Distribution of weights at normal displacement:
Armament: 176 tons, 1.5 %
Armour: 3,270 tons, 28.4 %
- Belts: 804 tons, 7.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 387 tons, 3.4 %
- Armour Deck: 2,057 tons, 17.9 %
- Conning Tower: 22 tons, 0.2 %
Machinery: 1,899 tons, 16.5 %
Hull, fittings & equipment: 4,380 tons, 38.0 %
Fuel, ammunition & stores: 1,593 tons, 13.8 %
Miscellaneous weights: 200 tons, 1.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,774 lbs / 9,876 Kg = 201.6 x 6.0 " / 152 mm shells or 2.8 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 3.9 ft / 1.2 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.472
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 28.36 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.50 ft / 8.38 m
- Forecastle (17 %): 20.00 ft / 6.10 m
- Mid (50 %): 20.00 ft / 6.10 m
- Quarterdeck (17 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 20.51 ft / 6.25 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.5 %
- Above water (accommodation/working, high = better): 165.2 %
Waterplane Area: 27,798 Square feet or 2,582 Square metres
Displacement factor (Displacement / loading): 133 %
Structure weight / hull surface area: 105 lbs/sq ft or 515 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.43
- 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

75t for three floatplanes
75t for Electronics outfit
50t for two catapults and cranes

Four ships:
MIBN Sagitério
MIBN Piqueiro
MIBN Esgrimsta
MIBN Mosqueteiro

Almirante Class, Empire of Brazil Light Cruiser laid down 1935

Displacement:
10,713 t light; 11,150 t standard; 12,007 t normal; 12,693 t full load

Dimensions: Length overall / water x beam x draught
614.11 ft / 600.00 ft x 65.00 ft x 21.60 ft (normal load)
187.18 m / 182.88 m x 19.81 m x 6.58 m

Armament:
15 - 6.00" / 152 mm guns (5x3 guns), 120.00lbs / 54.43kg shells, 1935 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 2 raised mounts - superfiring
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1935 Model
Breech loading guns in deck mounts with hoists
on side, all amidships
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
16 - 0.54" / 13.7 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread, 6 raised mounts
Weight of broadside 2,254 lbs / 1,022 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: 6.00" / 152 mm 402.00 ft / 122.53 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 103 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 2.25" / 57 mm 4.00" / 102 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm - -

- Armour deck: 3.45" / 88 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 78,244 shp / 58,370 Kw = 30.50 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 1,543 tons

Complement:
573 - 745

Cost:
£4.602 million / $18.407 million

Distribution of weights at normal displacement:
Armament: 259 tons, 2.2 %
Armour: 3,217 tons, 26.8 %
- Belts: 1,006 tons, 8.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 521 tons, 4.3 %
- Armour Deck: 1,657 tons, 13.8 %
- Conning Tower: 34 tons, 0.3 %
Machinery: 2,223 tons, 18.5 %
Hull, fittings & equipment: 5,014 tons, 41.8 %
Fuel, ammunition & stores: 1,294 tons, 10.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,161 lbs / 8,691 Kg = 177.4 x 6.0 " / 152 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.2 ft / 1.0 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.58
Seaboat quality (Average = 1.00): 1.36

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.499
Length to Beam Ratio: 9.23 : 1
'Natural speed' for length: 24.49 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 52
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: 30.25 ft / 9.22 m
- Forecastle (17 %): 22.00 ft / 6.71 m
- Mid (50 %): 22.00 ft / 6.71 m
- Quarterdeck (16 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 22.56 ft / 6.88 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 77.7 %
- Above water (accommodation/working, high = better): 149.6 %
Waterplane Area: 25,958 Square feet or 2,412 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 117 lbs/sq ft or 573 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.79
- Overall: 1.05
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

Three ships:
Almirante Barroso
Almirante Tamandaré
Almirante Abreu

Almirante Saldanha , Brazil Light Cruiser laid down 1938

Displacement:
9,952 t light; 10,393 t standard; 12,082 t normal; 13,434 t full load

Dimensions: Length overall / water x beam x draught
610.26 ft / 600.00 ft x 65.00 ft x 21.60 ft (normal load)
186.01 m / 182.88 m x 19.81 m x 6.58 m

Armament:
15 - 5.98" / 152 mm guns (5x3 guns), 120.00lbs / 54.43kg shells, 1938 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 2 raised mounts - superfiring
8 - 4.72" / 120 mm guns (4x2 guns), 55.12lbs / 25.00kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.57lbs / 0.71kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
16 - 0.54" / 13.7 mm guns (8x2 guns), 0.08lbs / 0.04kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 2,273 lbs / 1,031 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: 5.50" / 140 mm 390.00 ft / 118.87 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 2.25" / 57 mm 4.00" / 102 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 82,367 shp / 61,446 Kw = 32.00 kts
Range 13,500nm at 15.00 kts
Bunker at max displacement = 3,041 tons

Complement:
576 - 749

Cost:
£4.963 million / $19.852 million

Distribution of weights at normal displacement:
Armament: 258 tons, 2.1 %
Armour: 2,454 tons, 20.3 %
- Belts: 899 tons, 7.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 519 tons, 4.3 %
- Armour Deck: 1,002 tons, 8.3 %
- Conning Tower: 34 tons, 0.3 %
Machinery: 2,255 tons, 18.7 %
Hull, fittings & equipment: 4,785 tons, 39.6 %
Fuel, ammunition & stores: 2,130 tons, 17.6 %
Miscellaneous weights: 200 tons, 1.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,545 lbs / 8,866 Kg = 182.4 x 6.0 " / 152 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 3.4 ft / 1.0 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 58 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.502
Length to Beam Ratio: 9.23 : 1
'Natural speed' for length: 28.12 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 22.00 ft / 6.71 m
- Forecastle (17 %): 22.00 ft / 6.71 m
- Mid (50 %): 22.00 ft / 6.71 m
- Quarterdeck (17 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 22.00 ft / 6.71 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.7 %
- Above water (accommodation/working, high = better): 155.2 %
Waterplane Area: 27,073 Square feet or 2,515 Square metres
Displacement factor (Displacement / loading): 131 %
Structure weight / hull surface area: 112 lbs/sq ft or 548 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.61
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent

75t for three floatplanes
75t for Electronics outfit
50t for two catapults and cranes

Bahia Class, Brazilian (ex-UK) Light Cruiser laid down 1913

Displacement:
3,383 t light; 3,507 t standard; 4,114 t normal; 4,600 t full load

Dimensions: Length overall / water x beam x draught
410.00 ft / 410.00 ft x 39.00 ft x 15.50 ft (normal load)
124.97 m / 124.97 m x 11.89 m x 4.72 m

Armament:
3 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
Breech loading guns in deck mounts
on centreline ends, majority forward
4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1913 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.57" / 40.0 mm guns (1x4 guns), 1.95lbs / 0.89kg shells, 1913 Model
Anti-aircraft guns in deck mount
on side
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1913 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 462 lbs / 209 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: 3.00" / 76 mm 335.00 ft / 102.11 m 8.00 ft / 2.44 m
Ends: 2.50" / 64 mm 75.00 ft / 22.86 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: 2.50" / 64 mm - -
2nd: 1.00" / 25 mm - -
3rd: 0.50" / 13 mm - -
4th: 0.50" / 13 mm - -

- Armour deck: 0.90" / 23 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 36,715 shp / 27,389 Kw = 28.50 kts
Range 5,530nm at 15.00 kts
Bunker at max displacement = 1,093 tons

Complement:
256 - 333

Cost:
£0.402 million / $1.607 million

Distribution of weights at normal displacement:
Armament: 58 tons, 1.4 %
Armour: 602 tons, 14.6 %
- Belts: 379 tons, 9.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 31 tons, 0.8 %
- Armour Deck: 191 tons, 4.6 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,439 tons, 35.0 %
Hull, fittings & equipment: 1,284 tons, 31.2 %
Fuel, ammunition & stores: 732 tons, 17.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,243 lbs / 1,471 Kg = 30.0 x 6.0 " / 152 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.39
Metacentric height 2.2 ft / 0.7 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.581
Length to Beam Ratio: 10.51 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 61 %
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: 21.50 ft / 6.55 m
- Forecastle (35 %): 21.50 ft / 6.55 m (13.50 ft / 4.11 m aft of break)
- Mid (50 %): 13.50 ft / 4.11 m
- Quarterdeck (15 %): 13.50 ft / 4.11 m
- Stern: 13.50 ft / 4.11 m
- Average freeboard: 16.30 ft / 4.97 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 124.4 %
- Above water (accommodation/working, high = better): 75.6 %
Waterplane Area: 11,489 Square feet or 1,067 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 60 lbs/sq ft or 291 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 1.96
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily

Two Ships:
MIBN Bahia
MIBN Barroso

Sim by TheCanadian

Amazonas class, Brazilian (ex-UK) Light Cruiser laid down 1914

Displacement:
3,635 t light; 3,763 t standard; 4,203 t normal; 4,554 t full load

Dimensions: Length overall / water x beam x draught
420.00 ft / 420.00 ft x 41.50 ft x 14.50 ft (normal load)
128.02 m / 128.02 m x 12.65 m x 4.42 m

Armament:
4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1914 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1914 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.57" / 40.0 mm guns (1x4 guns), 1.95lbs / 0.89kg shells, 1914 Model
Anti-aircraft guns in deck mount
on side
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1914 Model
Breech loading 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: 3.00" / 76 mm 340.00 ft / 103.63 m 8.00 ft / 2.44 m
Ends: 2.50" / 64 mm 80.00 ft / 24.38 m 8.00 ft / 2.44 m
Main Belt covers 125 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.50" / 64 mm - -
2nd: 1.00" / 25 mm - -
3rd: 0.50" / 13 mm - -
4th: 0.50" / 13 mm - -

- Armour deck: 0.80" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
No drive to shaft, 4 shafts, 37,083 shp / 27,664 Kw = 28.50 kts
Range 4,050nm at 15.00 kts
Bunker at max displacement = 791 tons

Complement:
260 - 339

Cost:
£0.484 million / $1.936 million

Distribution of weights at normal displacement:
Armament: 63 tons, 1.5 %
Armour: 613 tons, 14.6 %
- Belts: 389 tons, 9.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 38 tons, 0.9 %
- Armour Deck: 186 tons, 4.4 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,428 tons, 34.0 %
Hull, fittings & equipment: 1,531 tons, 36.4 %
Fuel, ammunition & stores: 567 tons, 13.5 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,902 lbs / 1,770 Kg = 36.1 x 6.0 " / 152 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.1 ft / 0.6 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 81 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.61

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.582
Length to Beam Ratio: 10.12 : 1
'Natural speed' for length: 20.49 kts
Power going to wave formation at top speed: 61 %
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: 25.00 ft / 7.62 m
- Forecastle (30 %): 25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
- Mid (50 %): 17.00 ft / 5.18 m
- Quarterdeck (15 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 19.40 ft / 5.91 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 122.0 %
- Above water (accommodation/working, high = better): 106.7 %
Waterplane Area: 12,535 Square feet or 1,165 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 61 lbs/sq ft or 300 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 2.93
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
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 Ships:
MIBN Amazonas
MIBN Abreu

Bahia (ex-Biliran), Brazilian Destroyer Leader & Anti-Aircraft Cruiser laid down 1933 (Engine 1943)

Displacement:
3,160 t light; 3,335 t standard; 3,948 t normal; 4,439 t full load

Dimensions: Length overall / water x beam x draught
439.62 ft / 433.07 ft x 41.01 ft x 17.29 ft (normal load)
134.00 m / 132.00 m x 12.50 m x 5.27 m

Armament:
8 - 4.72" / 120 mm guns (4x2 guns), 52.91lbs / 24.00kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1943 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, 1943 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, 1943 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
6 - 0.54" / 13.7 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 463 lbs / 210 kg
Shells per gun, main battery: 350
10 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.57" / 40 mm 433.07 ft / 132.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 154 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 1.97" / 50 mm
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -
4th: 0.39" / 10 mm - -
5th: 0.39" / 10 mm - -

- Armour deck: 0.79" / 20 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 48,200 shp / 35,958 Kw = 32.51 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 1,104 tons

Complement:
248 - 323

Cost:
£1.576 million / $6.303 million

Distribution of weights at normal displacement:
Armament: 58 tons, 1.5 %
Armour: 495 tons, 12.5 %
- Belts: 290 tons, 7.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 0.6 %
- Armour Deck: 171 tons, 4.3 %
- Conning Tower: 11 tons, 0.3 %
Machinery: 1,245 tons, 31.5 %
Hull, fittings & equipment: 1,163 tons, 29.4 %
Fuel, ammunition & stores: 788 tons, 20.0 %
Miscellaneous weights: 200 tons, 5.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,469 lbs / 1,120 Kg = 46.8 x 4.7 " / 120 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 67 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 10.56 : 1
'Natural speed' for length: 23.79 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 16.60 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.98 ft / 6.70 m
- Forecastle (20 %): 15.42 ft / 4.70 m
- Mid (60 %): 15.42 ft / 4.70 m
- Quarterdeck (15 %): 15.42 ft / 4.70 m
- Stern: 15.42 ft / 4.70 m
- Average freeboard: 15.94 ft / 4.86 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 120.7 %
- Above water (accommodation/working, high = better): 85.3 %
Waterplane Area: 11,768 Square feet or 1,093 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 54 lbs/sq ft or 262 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.69
- Longitudinal: 1.62
- Overall: 0.75
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

Greenhalgh Class, CanVick 8k 7.5, Export Cruiser laid down 1943 [sim date, actual construction began Q1/45]

Displacement:
8,000 t light; 8,399 t standard; 9,235 t normal; 9,904 t full load

Dimensions: Length overall / water x beam x draught
563.97 ft / 557.00 ft x 56.00 ft x 19.00 ft (normal load)
171.90 m / 169.77 m x 17.07 m x 5.79 m

Armament:
6 - 7.50" / 191 mm guns (3x2 guns), 250.00lbs / 113.40kg shells, 1943 Model
Automatic rapid fire guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
10 - 4.72" / 120 mm guns (5 mounts), 52.58lbs / 23.85kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 1 raised gun
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1943 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, 1943 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 2,061 lbs / 935 kg
Shells per gun, main battery: 175
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.75" / 121 mm 325.00 ft / 99.06 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 90 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 3.00" / 76 mm 4.00" / 102 mm
2nd: 2.00" / 51 mm 0.50" / 13 mm 0.50" / 13 mm

- Armour deck: 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 73,172 shp / 54,586 Kw = 32.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,505 tons

Complement:
470 - 612

Cost:
£4.994 million / $19.974 million

Distribution of weights at normal displacement:
Armament: 260 tons, 2.8 %
Armour: 1,859 tons, 20.1 %
- Belts: 655 tons, 7.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 370 tons, 4.0 %
- Armour Deck: 835 tons, 9.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,890 tons, 20.5 %
Hull, fittings & equipment: 3,816 tons, 41.3 %
Fuel, ammunition & stores: 1,235 tons, 13.4 %
Miscellaneous weights: 175 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,723 lbs / 5,771 Kg = 60.3 x 7.5 " / 191 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 2.7 ft / 0.8 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.67
Seaboat quality (Average = 1.00): 1.15

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.545
Length to Beam Ratio: 9.95 : 1
'Natural speed' for length: 26.81 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 45
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: 26.00 ft / 7.92 m
- Forecastle (33 %): 25.00 ft / 7.62 m
- Mid (50 %): 25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
- Quarterdeck (15 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 21.13 ft / 6.44 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.1 %
- Above water (accommodation/working, high = better): 131.8 %
Waterplane Area: 22,563 Square feet or 2,096 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 102 lbs/sq ft or 496 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.82
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

MIBN Greenhalgh: commissioned 1 June 1946
MIBN Bosísio: commissioned 1 June 1946