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Quoted
Project 618A, Argentina Light Patrol Craft laid down 1946
Displacement:
175 t light; 181 t standard; 192 t normal; 200 t full load
Dimensions: Length overall / water x beam x draught
149.13 ft / 144.36 ft x 21.33 ft x 5.74 ft (normal load)
45.46 m / 44.00 m x 6.50 m x 1.75 m
Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 13.67lbs / 6.20kg shells, 1933 Model
Quick firing gun in deck mount
on centreline forward
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on centreline, all aft, 1 raised mount - superfiring
4 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1933 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 20 lbs / 9 kg
Shells per gun, main battery: 200
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.39" / 10 mm - -
3rd: 0.39" / 10 mm - -
- Conning tower: 0.79" / 20 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 2,000 shp / 1,492 Kw = 21.18 kts
Range 1,700nm at 12.00 kts
Bunker at max displacement = 19 tons
Complement:
25 - 33
Cost:
£0.107 million / $0.429 million
Distribution of weights at normal displacement:
Armament: 2 tons, 1.3 %
Armour: 3 tons, 1.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 2 tons, 1.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 50 tons, 26.0 %
Hull, fittings & equipment: 105 tons, 54.7 %
Fuel, ammunition & stores: 17 tons, 8.9 %
Miscellaneous weights: 15 tons, 7.8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
353 lbs / 160 Kg = 27.5 x 3.0 " / 75 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.14
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.380
Length to Beam Ratio: 6.77 : 1
'Natural speed' for length: 14.47 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.12 ft / 4.00 m
- Forecastle (20 %): 10.50 ft / 3.20 m
- Mid (50 %): 9.35 ft / 2.85 m
- Quarterdeck (15 %): 9.35 ft / 2.85 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 9.88 ft / 3.01 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103.6 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 1,947 Square feet or 181 Square metres
Displacement factor (Displacement / loading): 140 %
Structure weight / hull surface area: 28 lbs/sq ft or 135 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.79
- Longitudinal: 8.28
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
1x rack for 4x DC
Quoted
Project 621 Class, Argentina Coastal Minesweeper laid down 1946
Displacement:
476 t light; 493 t standard; 571 t normal; 634 t full load
Dimensions: Length overall / water x beam x draught
216.44 ft / 213.25 ft x 27.89 ft x 8.20 ft (normal load)
65.97 m / 65.00 m x 8.50 m x 2.50 m
Armament:
1 - 3.94" / 100 mm guns in single mounts, 30.42lbs / 13.80kg shells, 1933 Model
Dual purpose gun in deck mount
on centreline forward
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1941 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, 1 raised mount
4 - 0.52" / 13.2 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1933 Model
Machine guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
Weight of broadside 37 lbs / 17 kg
Shells per gun, main battery: 250
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.59" / 15 mm - -
3rd: 0.39" / 10 mm - -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,100 shp / 820 Kw = 15.14 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 141 tons
Complement:
57 - 75
Cost:
£0.173 million / $0.691 million
Distribution of weights at normal displacement:
Armament: 5 tons, 0.8 %
Armour: 3 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 27 tons, 4.8 %
Hull, fittings & equipment: 261 tons, 45.7 %
Fuel, ammunition & stores: 96 tons, 16.7 %
Miscellaneous weights: 180 tons, 31.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,701 lbs / 772 Kg = 55.8 x 3.9 " / 100 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 0.8 ft / 0.3 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.410
Length to Beam Ratio: 7.65 : 1
'Natural speed' for length: 14.60 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 25
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 16.40 ft / 5.00 m
- Mid (45 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (20 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 12.93 ft / 3.94 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 57.6 %
- Above water (accommodation/working, high = better): 154.8 %
Waterplane Area: 3,683 Square feet or 342 Square metres
Displacement factor (Displacement / loading): 208 %
Structure weight / hull surface area: 35 lbs/sq ft or 170 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 5.81
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Class Names: ARA Calchaqui, Capayan, Chiquillan, Chulupi, Mocovi, Morloyan
Quoted
Light Scout Cruiser, Atlantis Design Scout Cruiser laid down 1932
Displacement:
4,277 t light; 4,454 t standard; 4,944 t normal; 5,337 t full load
Dimensions: Length overall / water x beam x draught
485.91 ft / 475.00 ft x 46.00 ft x 18.00 ft (normal load)
148.11 m / 144.78 m x 14.02 m x 5.49 m
Armament:
10 - 5.12" / 130 mm guns (5x2 guns), 66.14lbs / 30.00kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 684 lbs / 310 kg
Shells per gun, main battery: 200
12 - 23.6" / 599.44 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.57" / 40 mm 429.99 ft / 131.06 m 8.01 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 139 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
- Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 63,484 shp / 47,359 Kw = 34.00 kts
Range 6,200nm at 15.00 kts
Bunker at max displacement = 883 tons
Complement:
294 - 383
Cost:
£2.203 million / $8.813 million
Distribution of weights at normal displacement:
Armament: 87 tons, 1.8 %
Armour: 486 tons, 9.8 %
- Belts: 213 tons, 4.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 44 tons, 0.9 %
- Armour Deck: 209 tons, 4.2 %
- Conning Tower: 20 tons, 0.4 %
Machinery: 1,874 tons, 37.9 %
Hull, fittings & equipment: 1,760 tons, 35.6 %
Fuel, ammunition & stores: 668 tons, 13.5 %
Miscellaneous weights: 70 tons, 1.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,957 lbs / 1,341 Kg = 44.1 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.4 ft / 0.7 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.440
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 25.00 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.99 ft / 9.14 m
- Forecastle (20 %): 18.21 ft / 5.55 m
- Mid (50 %): 18.21 ft / 5.55 m
- Quarterdeck (15 %): 18.21 ft / 5.55 m
- Stern: 18.21 ft / 5.55 m
- Average freeboard: 19.15 ft / 5.84 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 138.2 %
- Above water (accommodation/working, high = better): 88.4 %
Waterplane Area: 14,359 Square feet or 1,334 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 64 lbs/sq ft or 314 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 2.15
- Overall: 0.80
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily
1946 Refit Notes
Replacement of twin 37mm mounts with new 1944 Model mounts
Replacement of single 20mm mounts with new twin mounts
Removal of 12.7mm machine-guns
Refurbishment of internal fittings for life extension
Replacement of LA and HA rangefinders with new HA/LA director towers
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