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Lubānas, Latvian Minelayer laid down 1932

Displacement:
997 t light; 1,032 t standard; 1,123 t normal; 1,196 t full load

Dimensions: Length overall / water x beam x draught
246.67 ft / 239.50 ft x 32.81 ft x 10.01 ft (normal load)
75.18 m / 73.00 m x 10.00 m x 3.05 m

Armament:
2 - 3.94" / 100 mm guns (1x2 guns), 37.47lbs / 17.00kg shells, 1932 Model
Quick firing guns in a deck mount with hoist
on centreline forward
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1932 Model
Anti-aircraft guns in deck mounts with hoists
on centreline, all aft, all raised mounts - superfiring
4 - 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 67 lbs / 31 kg
Shells per gun, main battery: 300

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -

- Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 3,251 shp / 2,425 Kw = 18.00 kts
Range 2,400nm at 15.00 kts
Bunker at max displacement = 165 tons

Complement:
96 - 126

Cost:
£0.252 million / $1.008 million

Distribution of weights at normal displacement:
Armament: 8 tons, 0.8 %
Armour: 8 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 5 tons, 0.4 %
Machinery: 96 tons, 8.5 %
Hull, fittings & equipment: 435 tons, 38.7 %
Fuel, ammunition & stores: 126 tons, 11.2 %
Miscellaneous weights: 450 tons, 40.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,935 lbs / 877 Kg = 63.4 x 3.9 " / 100 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 1.0 ft / 0.3 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.14
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 7.30 : 1
'Natural speed' for length: 15.48 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 25
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: 19.69 ft / 6.00 m
- Forecastle (20 %): 15.75 ft / 4.80 m
- Mid (50 %): 15.75 ft / 4.80 m (9.19 ft / 2.80 m aft of break)
- Quarterdeck (15 %): 9.19 ft / 2.80 m
- Stern: 9.19 ft / 2.80 m
- Average freeboard: 12.78 ft / 3.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.3 %
- Above water (accommodation/working, high = better): 126.9 %
Waterplane Area: 5,235 Square feet or 486 Square metres
Displacement factor (Displacement / loading): 157 %
Structure weight / hull surface area: 48 lbs/sq ft or 233 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 3.50
- Overall: 1.06
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

Breakdown of Miscellaneous Weights:
-450 mines

Ships in Class:
- Lubānas
- Drīdzis

Notes:
Renamed during the repost.