WesWorld

Type 2B MTB
Only two left in service as TM16 and TM16 as MTB trainers
Specs as above except wood+steel hull, 38.5kts


****

Type 3A River Gunboat
ARA R1 to R5
(wood+steel) 27 tons, 19/4.8/0.6m, two 150bhp diesels 11kts, 1x37mm 1x20mm 3x7.92mm MG, 19 crew


****

Type 7A River Gunboat
ARA R6 to R10
(wood+steel) 27 tons, 19.2/4.8/0.65m, two 150bhp diesels 11kts, 2x37mm 2x13mm HMG 2x7.92mm MG, 21 crew

MAS 501 Class

ARA M1 to M15

22tons
17 x 4.4 x 1.25m
2-shaft Isotta-Fraschini Motors, 2.300ps
44knts maximum speed
Range 400nm @ 42knts
2 x 450mm torpedoes
1 x 20mm Orkileon FFL Cannon
2 x 7.92mm mg

Large, heavily armed and seaworthy design. Usually 450mm torpedoes are carried.


****

Project 612 Class (Italian MZ1 Type)

ARA LC1 to LC6 (LC7-12 planned for 1943)

Like MFPs and coastal ferries. General supply to small coastal bases carrying supplies, 2-3large tanks as maximum, artillery. Mainly for supplies and mail however. Useful small tenders for small MAS bases, able to carry spare parts and ammunition.


****
Planned but not yet built

Project 612 (Italian MZ1), Argentina/ Italy Landing Transport/Tender/Fire Support laid down 1935

Displacement:
200 t light; 205 t standard; 217 t normal; 226 t full load

Dimensions: Length overall / water x beam x draught
159.71 ft / 154.20 ft x 21.42 ft x 3.28 ft (normal load)
48.68 m / 47.00 m x 6.53 m x 1.00 m

Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 13.67lbs / 6.20kg shells, 1932 Model
Quick firing gun in deck mount
on centreline forward
2 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
1 - 0.00" / 0.0 mm guns in single mounts, 0.00lbs / 0.00kg shells, 1932 Model
Anti-aircraft gun in deck mount
on centreline aft
Weight of broadside 17 lbs / 8 kg
Shells per gun, main battery: 50

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 400 shp / 299 Kw = 12.60 kts
Range 1,900nm at 10.00 kts
Bunker at max displacement = 21 tons

Complement:
27 - 36

Cost:
£0.052 million / $0.209 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.9 %
Machinery: 11 tons, 5.2 %
Hull, fittings & equipment: 82 tons, 37.8 %
Fuel, ammunition & stores: 17 tons, 7.6 %
Miscellaneous weights: 105 tons, 48.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
458 lbs / 208 Kg = 35.6 x 3.0 " / 75 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 0.7 ft / 0.2 m
Roll period: 10.8 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.14

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.700
Length to Beam Ratio: 7.20 : 1
'Natural speed' for length: 12.42 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 40.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 6.56 ft / 2.00 m
- Forecastle (20 %): 5.91 ft / 1.80 m
- Mid (50 %): 5.58 ft / 1.70 m
- Quarterdeck (15 %): 5.58 ft / 1.70 m
- Stern: 5.58 ft / 1.70 m
- Average freeboard: 5.74 ft / 1.75 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.9 %
- Above water (accommodation/working, high = better): 105.6 %
Waterplane Area: 2,648 Square feet or 246 Square metres
Displacement factor (Displacement / loading): 151 %
Structure weight / hull surface area: 24 lbs/sq ft or 118 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.09
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate

Pic by Wes

ARA G1 to G18

Project 611, Argentina Light Patrol Craft laid down 1933

Displacement:
177 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, 13.66lbs / 6.20kg shells, 1932 Model
Quick firing gun in deck mount
on centreline forward
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mount
on centreline aft
4 - 0.31" / 7.9 mm guns (2x2 guns), 0.02lbs / 0.01kg shells, 1933 Model
Machine guns in deck mounts
on side, all forward
Weight of broadside 17 lbs / 8 kg
Shells per gun, main battery: 80

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm - -

Machinery:
Diesel Internal combustion motors,
Direct drive, 2 shafts, 2,000 shp / 1,492 Kw = 21.18 kts
Range 1,500nm at 12.00 kts
Bunker at max displacement = 19 tons

Complement:
25 - 33

Cost:
£0.076 million / $0.303 million

Distribution of weights at normal displacement:
Armament: 2 tons, 1.0 %
Armour: 1 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 58 tons, 30.4 %
Hull, fittings & equipment: 104 tons, 54.4 %
Fuel, ammunition & stores: 15 tons, 7.9 %
Miscellaneous weights: 11 tons, 5.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
305 lbs / 138 Kg = 23.7 x 3.0 " / 75 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.08
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): 43
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): 112.7 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 1,947 Square feet or 181 Square metres
Displacement factor (Displacement / loading): 133 %
Structure weight / hull surface area: 28 lbs/sq ft or 134 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.79
- Longitudinal: 8.28
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent


****

From mid 1935 production shifted to the Project 611L2 design

Project 611L2, Argentina Light Patrol Craft laid down 1933

Displacement:
176 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:
2 - 2.95" / 75.0 mm guns in single mounts, 13.66lbs / 6.20kg shells, 1932 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
2 - 0.79" / 20.0 mm guns (1x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mount
on centreline amidships
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, all forward
Weight of broadside 28 lbs / 13 kg
Shells per gun, main battery: 80

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.59" / 15 mm -
2nd: 0.39" / 10 mm - -
3rd: 0.39" / 10 mm - -

- Conning tower: 0.59" / 15 mm

Machinery:
Diesel Internal combustion motors,
Direct drive, 2 shafts, 2,000 shp / 1,492 Kw = 21.18 kts
Range 1,500nm at 12.00 kts
Bunker at max displacement = 19 tons

Complement:
25 - 33

Cost:
£0.081 million / $0.324 million

Distribution of weights at normal displacement:
Armament: 3 tons, 1.7 %
Armour: 3 tons, 1.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 1.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.2 %
Machinery: 58 tons, 30.4 %
Hull, fittings & equipment: 106 tons, 55.4 %
Fuel, ammunition & stores: 16 tons, 8.1 %
Miscellaneous weights: 5 tons, 2.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
298 lbs / 135 Kg = 23.1 x 3.0 " / 75 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.13
Seaboat quality (Average = 1.00): 1.16

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): 43
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): 114.4 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 1,947 Square feet or 181 Square metres
Displacement factor (Displacement / loading): 127 %
Structure weight / hull surface area: 28 lbs/sq ft or 137 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.78
- Longitudinal: 8.56
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent


****

In 1937 four Project 611L3 AA escort boats were built followed later by two more.

ARA GA1 to GA6

Project 611L3, Argentina Light Patrol Craft laid down 1933

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:
8 - 1.46" / 37.0 mm guns (3 mounts), 1.55lbs / 0.70kg shells, 1932 Model
Quick firing guns in deck mounts
on centreline ends, majority aft
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, all forward
Weight of broadside 13 lbs / 6 kg
Shells per gun, main battery: 300

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm - -

- Conning tower: 0.98" / 25 mm

Machinery:
Diesel Internal combustion motors,
Direct drive, 2 shafts, 2,000 shp / 1,492 Kw = 21.18 kts
Range 1,500nm at 12.00 kts
Bunker at max displacement = 19 tons

Complement:
25 - 33

Cost:
£0.074 million / $0.296 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.8 %
Armour: 4 tons, 2.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 1.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.4 %
Machinery: 58 tons, 30.4 %
Hull, fittings & equipment: 103 tons, 53.9 %
Fuel, ammunition & stores: 17 tons, 8.6 %
Miscellaneous weights: 8 tons, 4.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
320 lbs / 145 Kg = 206.7 x 1.5 " / 37 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.16

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): 43
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): 110.4 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 1,947 Square feet or 181 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.79
- Longitudinal: 8.33
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Four ex-Mexcian MAS(L)
Received Q1/41

ARA ML1
ARA ML2
ARA ML3
T-103 operated by customs

Orginal Specs
75 tons
2 x 47mm QF
2 x 50cal
4x21" TT (not normaly carried)
AC facilities
Flag Facilities
~35 kts

Refitted in 1941 with two 37mm cannon, two 13mm HMG, updated flag facilities and new engines for 35kts.

Twenty-three ex-Phillippine MAS da 38m class Fast Torpedo Craft brought in Q4/1942.
Commissioned as M18-M41

MAS da 38m Class Fast Torpedo Boat
Laid down 1925-1926 in Italy

~50 tons
1 x 100mm QF
1 x 20mm AA
6 21" torpedoes OR 1 a/c and 4 21" torpedoes
~40 kts

Refit Note
25mm cannon replaced with 20mm
New engines
Replacement of twelve 18in torpedoes with six 21in torpedoes

Designed to replace the Pr.611 Class.

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

Class:
ARA P-1 to P-8 commissioned 1946

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

ARA P-8 to P-18 (10 units) completed 1947-48

Type 9A (Improved MAS Typo 1000 Design) MTB
77 tons
35 x 5 x 1.5m
4x 1,275hp FMA-Spartan SMS-100A V-12 petrol engines (5,100hp total) driving four shafts
44kts
Range 500nm @ 40kts
1x1 37mm M1944, 1x2 20mm M1941, 4x 600mm torpedo tubes (4x torpedoes) and 6x DCs
21 crew
10mm armour around conning position

TM-28, TM-29, M-30 to M-34: completed 1948