WesWorld

Coastal forces



SC Type 4 class subchaser, 60 ships ordered, order cancelled, 12 of orriginal order purchased by Colombia

SC type 3 class Subchaser, 216 ships

SC type 2 class Subchaser, 72 ships, 12 more purchased by Colombia

SC type 1 class Subchaser, 12 ships transfered to Byzantean navy, 12 more sold to Chile

Type 1 class Coastal Motor Boat, CMB-1 through 121, 1 additional unit built for Persia (120) all sold

Type 2 class Coastal Motor boat, CMB-122 through 351 (240)

MTB-1 class, 80 boats total
aditional 25 boats built for foriegn buyers

MTB-82 through 201 (120 boats)
(30 built for foreign buyers)

MTB-202 through 291 (200 boats)

MTB-404 class (4 boats)

MTB-408 class (200 ordered)
16 built for Byzantium

Type 1 Motor launch 100 (40 built for foreign buyers)

Type 1 Motor launch 40, mine layer version (10 built for Turkey)

Type 2 motor launch, 120

MGB type 1, 100 built

MGB type 2, 20 built, 20 more ordered

TGB 1-17, taken out of service

TGB 18-33, taken out of service

GB 1-12 sold to Colombia

Future project

TGB 18-33 class 1905
16 ships
Dementions:230/27/12.5
Armament:2x4", 2x1", 4x0.76", 2x18" TT (2x1)
20 knots 912 tons

Torpedo's removed prior to Cleito treaty
Put into reserve in 1930, striped of weapons and sold into civilian service.

TGB 1-17 class 1904
16 ships
Dementions:230/27/12.5
Armament:2x4", 2x1", 4x0.76", 2x18" TT (2x1)
18 knots 895 tons

Torpedo's removed prior to Cleito treaty
Put into reserve in 1930, striped of weapons and sold into civilian service.

GB 1-12 class 1905
12 ships, Sold to Colombia

GB 1 class, Atlantean Gunboat laid down 1905

Displacement:
745 t light; 768 t standard; 848 t normal; 913 t full load

Dimensions: Length overall / water x beam x draught
190.64 ft / 188.00 ft x 32.00 ft x 10.50 ft (normal load)
58.11 m / 57.30 m x 9.75 m x 3.20 m

Armament:
2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1905 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1905 Model
Quick firing guns in deck mounts
on side, all amidships
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1905 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 67 lbs / 30 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.79" / 20 mm -

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 1,600 ihp / 1,193 Kw = 15.33 kts
Range 6,000nm at 7.15 kts
Bunker at max displacement = 145 tons (100% coal)

Complement:
78 - 102

Cost:
£0.066 million / $0.262 million

Distribution of weights at normal displacement:
Armament: 8 tons, 1.0 %
Armour: 5 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 232 tons, 27.3 %
Hull, fittings & equipment: 489 tons, 57.7 %
Fuel, ammunition & stores: 103 tons, 12.2 %
Miscellaneous weights: 10 tons, 1.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,189 lbs / 539 Kg = 37.1 x 4.0 " / 102 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.37
Metacentric height 1.6 ft / 0.5 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.76

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.470
Length to Beam Ratio: 5.88 : 1
'Natural speed' for length: 13.71 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 41
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: 15.00 ft / 4.57 m
- Forecastle (20 %): 14.00 ft / 4.27 m
- Mid (50 %): 14.00 ft / 4.27 m (7.00 ft / 2.13 m aft of break)
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 10.58 ft / 3.22 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 98.1 %
- Above water (accommodation/working, high = better): 97.5 %
Waterplane Area: 3,903 Square feet or 363 Square metres
Displacement factor (Displacement / loading): 155 %
Structure weight / hull surface area: 78 lbs/sq ft or 381 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.71
- Longitudinal: 6.17
- Overall: 1.94
Hull space for machinery, storage, compartmentation is adequate
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

Future project is to go here

SC type 4 (export design)

Atlantean Subchaser laid down 1935

Displacement:
106 t light; 111 t standard; 121 t normal; 128 t full load

Dimensions: Length overall / water x beam x draught
114.33 ft / 110.00 ft x 18.00 ft x 5.20 ft (normal load)
34.85 m / 33.53 m x 5.49 m x 1.58 m

Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.88lbs / 5.84kg shells, 1935 Model
Quick firing gun in deck mount
on centreline forward
2 - 1.58" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 0.79" / 20.0 mm guns (1x4 guns), 0.24lbs / 0.11kg shells, 1935 Model
Anti-aircraft guns in deck mount
on side
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 18 lbs / 8 kg
Shells per gun, main battery: 250

Equipment: Radio (W/T), hydrophone, smoke apparatus

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

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,149 shp / 857 Kw = 18.00 kts
Range 1,500nm at 12.00 kts
Bunker at max displacement = 17 tons

Complement:
17 - 23

Cost:
£0.052 million / $0.207 million

Distribution of weights at normal displacement:
Armament: 2 tons, 1.9 %
Armour: 1 tons, 1.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 1.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 33 tons, 27.1 %
Hull, fittings & equipment: 58 tons, 47.8 %
Fuel, ammunition & stores: 15 tons, 12.3 %
Miscellaneous weights: 12 tons, 9.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
156 lbs / 71 Kg = 12.1 x 3.0 " / 75 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 0.5 ft / 0.1 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.14
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.410
Length to Beam Ratio: 6.11 : 1
'Natural speed' for length: 10.49 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 48
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: 11.90 ft / 3.63 m
- Forecastle (20 %): 7.51 ft / 2.29 m
- Mid (50 %): 7.51 ft / 2.29 m
- Quarterdeck (15 %): 7.51 ft / 2.29 m
- Stern: 7.51 ft / 2.29 m
- Average freeboard: 7.86 ft / 2.40 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 114.6 %
- Above water (accommodation/working, high = better): 103.2 %
Waterplane Area: 1,226 Square feet or 114 Square metres
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 24 lbs/sq ft or 120 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 8.05
- Overall: 1.04
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

SC type 3 class Subchaser 1923
216 ships


Atlantis sub chaser/patrol vessel laid down 1923

Displacement:
111 t light; 115 t standard; 122 t normal; 128 t full load
Loading submergence 33 tons/feet

Dimensions:
110.00 ft x 15.00 ft x 4.50 ft (normal load)
33.53 m x 4.57 m x 1.37 m

Armament:
1 - 3.00" / 76 mm gun
2 - 1.57" / 40 mm AA guns
4 - 1.00" / 25 mm guns
Weight of broadside 19 lbs / 9 kg

Equipment: Radio (W/T), hydrophone, smoke apparatus

Armour:
Main gun shield 1.00" / 25 mm

Machinery:
Petrol Internal combustion motors,
Direct drive, 1 shaft, 1,254 shp / 936 Kw = 18.00 kts
Range 1,000nm at 12.00 kts

Complement:
18 - 23

Cost:
£0.034 million / $0.137 million

Distribution of weights at normal displacement:
Armament: 2 tons, 2.0 %
Armour: 1 tons, 0.5 %
Belts: 0 tons, 0.0 %, Armament: 1 tons, 0.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 42 tons, 34.3 %
Hull, fittings & equipment: 56 tons, 45.6 %
Fuel, ammunition & stores: 12 tons, 9.4 %
Miscellaneous weights: 10 tons, 8.2 %

Metacentric height 0.3

Remarks:
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Caution: Lacks seaworthiness - very limited seakeeping ability

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.04
Shellfire needed to sink: 93 lbs / 42 Kg = 6.9 x 3.0 " / 76 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 42 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.23
Relative quality as seaboat: 0.59

Hull form characteristics:
Block coefficient: 0.577
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.77
'Natural speed' for length: 10.49 kts
Power going to wave formation at top speed: 72 %
Trim: 60
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 135.0 %
Relative accommodation and working space: 78.5 %
(Average = 100%)
Displacement factor: 107 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.05
(Structure weight / hull surface area: 29 lbs / square foot or 140 Kg / square metre)
Relative longitudinal hull strength: 3.63
(for 6.50 ft / 1.98 m average freeboard, freeboard adjustment 0.22 ft)
Relative composite hull strength: 1.19

SC type 2 class Subchaser 1919/20, 72 ships (orriginally 84 ships)

Type 2, Atlantean Subchaser laid down 1919

Displacement:
109 t light; 113 t standard; 121 t normal; 127 t full load

Dimensions: Length overall / water x beam x draught
110.00 ft / 110.00 ft x 15.00 ft x 4.50 ft (normal load)
33.53 m / 33.53 m x 4.57 m x 1.37 m

Armament:
1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
Breech loading gun in deck mount
on centreline forward
1 - 1.58" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1919 Model
Breech loading gun in deck mount
on side amidships
4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1919 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 17 lbs / 8 kg
Shells per gun, main battery: 150

Equipment: Radio (W/T), hydrophone, smoke apparatus

Machinery:
Petrol Internal combustion motors,
Direct drive, 1 shaft, 1,239 shp / 924 Kw = 18.00 kts
Range 1,000nm at 12.00 kts
Bunker at max displacement = 14 tons

Complement:
17 - 23

Cost:
£0.026 million / $0.103 million

Distribution of weights at normal displacement:
Armament: 2 tons, 1.8 %
Machinery: 44 tons, 36.4 %
Hull, fittings & equipment: 53 tons, 43.5 %
Fuel, ammunition & stores: 12 tons, 10.0 %
Miscellaneous weights: 10 tons, 8.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
88 lbs / 40 Kg = 6.5 x 3.0 " / 76 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.3 ft / 0.1 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 45 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 0.69

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.570
Length to Beam Ratio: 7.33 : 1
'Natural speed' for length: 10.49 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 60
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: 7.00 ft / 2.13 m
- Forecastle (20 %): 6.50 ft / 1.98 m
- Mid (50 %): 6.50 ft / 1.98 m
- Quarterdeck (15 %): 6.50 ft / 1.98 m
- Stern: 6.50 ft / 1.98 m
- Average freeboard: 6.54 ft / 1.99 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 140.8 %
- Above water (accommodation/working, high = better): 83.2 %
Waterplane Area: 1,142 Square feet or 106 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 25 lbs/sq ft or 120 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 5.20
- Overall: 1.15
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Caution: Lacks seaworthiness - very limited seakeeping ability

SC type 1 class Subchaser 1917
24 ships built (12 transfered to Byzantium, 12 more sold to chile)
Dementions:110/15/4.5
Armament:1x3", 1x1.57", 2x1"
18 knots 106 tons
Equipment: Radio (W/T), hydrophone, smoke apparatus

Type 1 class Coastal Motor Boat
(Based on British type 3 C.M.B.)

CMB-1 to 12 and CMB-14 to 121 (1928/29/30)

CMB-1 to 12 and CMB-14 to 41 transferred to the Republic of Byzantium
CMB-42 through 61 sold to Colombia, then sold to Poland
CMB-62 through 81 sold to Colombia

Demensions: 55x11x3
displacement:15 tons
Armament: 1x20mm forward, 2x0.50 cal mg aft of
bridge, 2x18"TT, 4 D.C.
Machinery: 2x 500 hp Roth petrol motor
Range: 100 nm @ 35 knots
Speed: 35 knots
Equipment: Radio (W/T)

Designed to operate primarily in the Taurian Sea, Caribbean and Sea of Marmara

1 additional unit built for Persia

MTB-1 class Motor Torpedo Boats

MTB-1 to 12 and MTB-14 to 61 laid down 1929/30

MTB-62 to 81 laid down 1930

80 vessels

Demensions: 70x19x5
displacement: 35 tons
Armament: 2x20mm, 2x0.50 cal mg, 4x18"TT, 6 D.C.
Machinery: Batch 1, 6 ships, 3x 1200 hp Packard petrol motors
Batch 2, 6 ships, 3x 1200 hp Roth petrol motors
Batch 3, 3x 1200 hp Roth-Packard liquid cooled engines

Range: 250 nm @ 35 knots
Speed: 40/41 knots
Crew: 15
Equipment: Radio (W/T), hydrophone, smoke apparatus

MTB-E1 through E38 (1930) export version of MTB-1

E-1 to 6, E-19 to 24 and E-35 to E-40 sold to Turkey
E-7 sold to Persia
E-8 to 12 and E-14 to 18 sold to Mexico, later sold to Colombia in exchange for 10xMTB-82 type
E-25 to 34 to Colombia, later E-8 to 18 purchased

Demensions: 70x19x5
displacement: 35 tons
Armament: 2x20mm, 4x0.50 cal mg, 4x18"TT, 6 D.C.
Machinery: 3x 1200 hp Roth-Packard liquid cooled engines
Speed: 41 knots
Cruising radius: 1200 nm
Crew: 15
Equipment: Radio (W/T), hydrophone, smoke apparatus

MTB-82 class

120 boats, plus 40 for foriegn buyers, 20 for Colombia, 10 for Nordmark and 10 for Mexico

E-35 to 44 sold to mexico
E-45 to 54 sold to Colombia
E-55 to 64 sold to Nordmark
E-65 to 74 sold to Colombia

MTB-82 through 201 built

Demensions: 77'x19',11"x5',3"
displacement: 46 tons
Armament: 1x20mm, 4x0.50 cal mg (2x2), 4x21"TT or 10 D.C.or 2x21" TT and 8 D.C.
Machinery: 3x 1200 hp Roth-Packard liquid cooled engines
Speed: 41 knots
Cruising radius: 1400 nm
Crew: 17
Equipment: Radio, hydrophone, smoke apparatus

MTB-202 class

216 ordered
200 built and in service
20 built for Colombia (some from original Atlantean order)

Demensions: 80.'3"x20',7"x5'
displacement: 50 tons
Armament: 2x20mm, 4x0.50 cal mg (2x2), 4x21"TT or 10 D.C.or 2x21" TT and 8 D.C.
Machinery: 3x 1500 hp Roth-Packard liquid cooled engines
Speed: 44 knots
Cruising radius: 1400 nm
Crew: 17
Equipment: Radio, surface radar, hydrophone, smoke apparatus

Type 1 Motor launch

120 boats, additional 20 built for Turkey

EP-11, EP 12, EP-14 to 21 sold to Turkey

MLP-1 to 12 and MLP-14 to 121 built

Dimensions: 110x17.5x4.6
Displacement: 60 tons
Armament 1x40mm forward, 2x20mm 4x0.50 cal mg, 12 D.C.
Machinery: 4x 500 hp Roth petrol motor
speed 25 knots
Equipment: Radio (W/T), hydrophone, sounding set, smoke apparatus

Type 1 Motor launch, mine layer version

40 boats, additional 10 built for Turkey

EPM-1 to 10 built for Turkey

MLPM-1 to 12 and MLPM-14 to 41 built

Dimensions: 110x17.5x4.6
Displacement: 68 tons
Armament: 1x40mm forward, 2x20mm 2x0.50 cal mg, 6 mines
Machinery: 4x 500 hp Roth petrol motor
speed 24 knots
Equipment: Radio (W/T), hydrophone, sounding set, smoke apparatus


Type 2 Motor launch

80 boats built

MLP-122 to 161 built

Dimensions 118x20x4.6
Displacement: 60 tons
Armament: 1x40mm forward, 2x20mm 4x0.50 cal mg, 12 D.C.
Machinery: 4x 800 hp Spartan petrol motors
speed 28 knots
Equipment: Radio (W/T), hydrophone, sounding set, smoke apparatus

MGB Type 1
(Project 611, Argentina Light Patrol Craft laid down 1933)


100 Type 1A in service (standard type)
20 type 1B ordered (heavy gunboat type) cancelled


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
4 - 0.79" / 20.0 mm guns (1x4 guns), 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mount
on centreline aft
4 - 0.30" / 7.62 mm guns (2x2 guns), 0.02lbs / 0.01kg shells, 1933 Model
Machine guns in deck mounts
on side, all forward
Weight of broadside 15 lbs / 7 kg
Shells per gun, main battery: 80

Equipment: Radio (W/T), hydrophone, smoke apparatus

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 - -

- 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:
£0.075 million / $0.299 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.9 %
Armour: 2 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.4 %
Machinery: 58 tons, 30.4 %
Hull, fittings & equipment: 104 tons, 54.3 %
Fuel, ammunition & stores: 15 tons, 7.8 %
Miscellaneous weights: 11 tons, 5.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
310 lbs / 141 Kg = 24.1 x 3.0 " / 75 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.07
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): 111.7 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 1,947 Square feet or 181 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 27 lbs/sq ft or 134 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.79
- Longitudinal: 8.27
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

MGB type 2

Heavily modified type 2 motor launch, similar armament to type 2 motor launch.
80 built, 120 more cancelled.

Dimensions: 115' x 20'.10"x 4'.9"
displacement: 95 tons
Armament 1x40mm forward, 2x20mm 2xtwin0.50 cal mg, 2x21" TT or 6 mines
Machinery 4x 1,200 hp Roth petrol motor
speed 30 knots
Equipment: Radio (W/T), hydrophone, smoke apparatus

CMB Type 2
240 boats
Dimensions: 65.62 x 11.48 x 3.28
Displacement: 12 tons
Engine: 3x Spartan 1500hp
Armament: 1x 20mm cannon, 1x 12.7mm MG, 1x 18" torpedo, or 2 mines
Top Speed: 55kts
range: 500nm @ 30kts
crew: 3
Equipment: Radio (W/T), smoke apparatus
Built in 1937-1939

MTB-404 class

4 in service, basically MTB-202 types with a modified armament and mounting points for a 60mm mortar

Demensions: 80.'3"x20',7"x5'
displacement: 50 tons
Armament: 1x40mm, 1x20mm, 2x0.50 cal mg (2x2), 1x60mm mortar or 4x21"TT or 10 D.C.or 2x21" TT and 8 D.C.
Machinery: 3x 1500 hp Roth-Packard liquid cooled engines
Speed: 44 knots
Cruising radius: 1400 nm
Crew: 16
Equipment: Radio, surface radar, radar based IFF, hydrophone, smoke apparatus

MTB-408 class
200 boats ordered in 1947
16 built for Byzantium

Demensions: 80.'9"x20',7"x5'
displacement: 52 tons
Armament: One or two 40mm, two 20mm and/or up to four 50 cal mg (2x2), one 60mm mortar, two Mk-1 eight cell 130mm rocket launchers, two 21" type 12 Torpedo's and/or four type 2 Depth charges
Crew Armament: Two Eleuthra Automatic Rifle (EAR) Mle.24A1, two Azeas Az34 sub machine guns, two Azeas-Petra AP carbine Mle.35A3
Machinery: 3x 1800 hp Roth-Packard liquid cooled engines
Speed: 40 knots
Crew: 17
Equipment: Radio, surface radar, radar based IFF, hydrophone, smoke apparatus