WesWorld

Coastal Depot Ship
Rundale-class Coastal Depot Ship
- Rundale

Icebreakers
Janis Plieksans-class Coastal Icebreakers
- Janis Plieksans
- Juris Alunans
- Zigfrids Anna Meierovics

Janis Plieksans, Latvia Icebreaker laid down 1930

Displacement:
808 t light; 830 t standard; 1,110 t normal; 1,334 t full load

Dimensions: Length overall / water x beam x draught
167.51 ft / 164.04 ft x 36.09 ft x 13.12 ft (normal load)
51.06 m / 50.00 m x 11.00 m x 4.00 m

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Ends: Unarmoured

- Torpedo Bulkhead:
1.97" / 50 mm 106.63 ft / 32.50 m 11.55 ft / 3.52 m

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 1,451 ihp / 1,082 Kw = 14.00 kts
Range 6,000nm at 14.00 kts
Bunker at max displacement = 503 tons

Complement:
95 - 124

Cost:
£0.167 million / $0.666 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 90 tons, 8.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 90 tons, 8.1 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 82 tons, 7.4 %
Hull, fittings & equipment: 486 tons, 43.8 %
Fuel, ammunition & stores: 302 tons, 27.2 %
Miscellaneous weights: 150 tons, 13.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,471 lbs / 1,574 Kg = 32.1 x 6 " / 152 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 1.3 ft / 0.4 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 4.55 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 19.69 ft / 6.00 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 18.04 ft / 5.50 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 14.07 ft / 4.29 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.2 %
- Above water (accommodation/working, high = better): 107.8 %
Waterplane Area: 3,944 Square feet or 366 Square metres
Displacement factor (Displacement / loading): 274 %
Structure weight / hull surface area: 68 lbs/sq ft or 333 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.30
- Longitudinal: 12.11
- Overall: 1.62
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, rides out heavy weather easily

Ships in Class:
- Janis Plieksans
- Juris Alunans
- Zigfrids Anna Meierovics

Notes:
- 150 tons for deicing equipment, rocking tanks, and heating equipment
- Given better names during repost.

Rundale, Flotilla Tender laid down 1939

Displacement:
1,800 t light; 1,865 t standard; 2,103 t normal; 2,294 t full load

Dimensions: Length overall / water x beam x draught
308.75 ft / 303.48 ft x 42.65 ft x 13.12 ft (normal load)
94.11 m / 92.50 m x 13.00 m x 4.00 m

Armament:
4 - 3.94" / 100 mm guns (2x2 guns), 30.51lbs / 13.84kg shells, 1939 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
4 - 1.46" / 37.0 mm guns (1x4 guns), 1.55lbs / 0.70kg shells, 1939 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 129 lbs / 59 kg
Shells per gun, main battery: 300

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: 0.79" / 20 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 9,453 shp / 7,052 Kw = 22.00 kts
Range 6,500nm at 13.50 kts
Bunker at max displacement = 429 tons

Complement:
154 - 201

Cost:
£0.654 million / $2.615 million

Distribution of weights at normal displacement:
Armament: 16 tons, 0.8 %
Armour: 10 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.1 %
Machinery: 256 tons, 12.2 %
Hull, fittings & equipment: 718 tons, 34.2 %
Fuel, ammunition & stores: 303 tons, 14.4 %
Miscellaneous weights: 800 tons, 38.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,055 lbs / 1,386 Kg = 100.1 x 3.9 " / 100 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 1.6 ft / 0.5 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 49 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.33

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.433
Length to Beam Ratio: 7.12 : 1
'Natural speed' for length: 17.42 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 36
Bow angle (Positive = bow angles forward): 15.00 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 %): 13.12 ft / 4.00 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (15 %): 9.84 ft / 3.00 m (13.12 ft / 4.00 m before break)
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 13.16 ft / 4.01 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 87.8 %
- Above water (accommodation/working, high = better): 132.3 %
Waterplane Area: 8,148 Square feet or 757 Square metres
Displacement factor (Displacement / loading): 145 %
Structure weight / hull surface area: 56 lbs/sq ft or 275 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 2.18
- Overall: 1.02
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

Ships in Class:
- Rundale

Notes:
Built in Ireland. Named after the Baroque palace of the Dukes of Courland.