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All light combatant vessels of 200t or less (motor torpedo boats, etc).

LMTB-1 class Light Motor Torpedo Boat
Dimensions: 85x21x5
Displacement: 45 tons
Armament: 2x.91'' , 6x0.50 cal mg, 4x20" TT, 8 D.C.
Machinery: 3x 1500 hp liquid cooled engines
Speed: 41.5 knots
Cruising radius: 1050 nm at economical speed
Crew: 15-18

50x vessels currently in service (2 disarmed and used for Sea Cadet training).

SC-1, Latvia Submarine Chaser laid down 1932
This class was designed to serve as a submarine chaser or light coastal minesweeper. Twenty-four vessels were built, with twelve equipped as subchasers and twelve equipped as minesweepers. The boats were all numbered in a single series, however, with the SC- designation used for subchasers (SC-1 through SC-12) and the SM- designation used for minesweepers (SM-13 through SM-24.

Displacement:
100 t light; 106 t standard; 120 t normal; 131 t full load

Dimensions: Length overall / water x beam x draught
131.23 ft / 131.23 ft x 14.76 ft x 4.92 ft (normal load)
40.00 m / 40.00 m x 4.50 m x 1.50 m

Armament:
1 - 2.99" / 76.0 mm guns in single mounts, 15.43lbs / 7.00kg 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, 1932 Model
Anti-aircraft guns in deck mount
on centreline aft
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 19 lbs / 8 kg
Shells per gun, main battery: 300

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 782 shp / 584 Kw = 17.00 kts
Range 2,400nm at 12.00 kts
Bunker at max displacement = 25 tons

Complement:
17 - 23

Cost:
£0.039 million / $0.154 million

Distribution of weights at normal displacement:
Armament: 2 tons, 1.7 %
Machinery: 23 tons, 19.3 %
Hull, fittings & equipment: 60 tons, 49.9 %
Fuel, ammunition & stores: 20 tons, 16.6 %
Miscellaneous weights: 15 tons, 12.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
214 lbs / 97 Kg = 16.0 x 3.0 " / 76 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 0.4 ft / 0.1 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.440
Length to Beam Ratio: 8.89 : 1
'Natural speed' for length: 11.46 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 27
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: 11.48 ft / 3.50 m
- Forecastle (20 %): 7.87 ft / 2.40 m
- Mid (50 %): 7.55 ft / 2.30 m
- Quarterdeck (15 %): 7.22 ft / 2.20 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 7.92 ft / 2.41 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.8 %
- Above water (accommodation/working, high = better): 98.4 %
Waterplane Area: 1,166 Square feet or 108 Square metres
Displacement factor (Displacement / loading): 154 %
Structure weight / hull surface area: 21 lbs/sq ft or 101 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.80
- Longitudinal: 7.68
- Overall: 1.01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
Subchaser Configuration
-5 tons hydrophones
-10 tons depth charges (30 depth charges)

Minesweeper Configuration
-15 tons paravanes and cables

Ships in Class:
Subchaser Configuration
- SC-1
- SC-2
- SC-3
- SC-4
- SC-5
- SC-6
- SC-7
- SC-8
- SC-9
- SC-10
- SC-11
- SC-12
Minesweeper Configuration
- SM-13
- SM-14
- SM-15
- SM-16
- SM-17
- SM-18
- SM-19
- SM-20
- SM-21
- SM-22
- SM-23
- SM-24