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Wednesday, July 8th 2020, 9:34pm

Yugoslav Designs for 1950

Jablanica, Yugoslav Submarine Rescue Vessel laid down 1950

Displacement: 1,417 t light; 1,454 t standard; 1,790 t normal; 2,059 t full load

Dimensions: Length overall / water x beam x draught

236.32 ft / 229.66 ft x 41.99 ft x 14.76 ft (normal load) [72.03 m / 70.00 m x 12.80 m x 4.50 m]

Armament:

2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1950 Model Anti-aircraft guns in deck mount on centerline forward
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1950 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 12 lbs / 6 kg
Shells per gun, main battery: 150

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 2,162 shp / 1,613 Kw = 15.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 604 tons

Complement: 136 - 178

Cost: £0.455 million / $1.818 million

Distribution of weights at normal displacement:

Armament: 2 tons, 0.1 %
Machinery: 52 tons, 2.9 %
Hull, fittings & equipment: 1,064 tons, 59.4 %
Fuel, ammunition & stores: 373 tons, 20.8 %
Miscellaneous weights: 300 tons, 16.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 8,318 lbs / 3,773 Kg = 1,472.1 x 2.2 " / 57 mm shells or 3.6 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.8 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has rise forward of midbreak
Block coefficient: 0.440
Length to Beam Ratio: 5.47: 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 9.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 20.34 ft / 6.20 m
- Mid (50 %): 19.69 ft / 6.00 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (25 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 16.71 ft / 5.09 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 29.8 %
- Above water (accommodation/working, high = better): 144.3 %
Waterplane Area: 6,103 Square feet or 567 Square meters
Displacement factor (Displacement / loading): 431 %
Structure weight / hull surface area: 94 lbs/sq ft or 460 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 1.53
- Longitudinal: 11.55
- Overall: 1.87
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

Facilities/equipment on board includes a rescue chamber and handling equipment, a decompression chamber, and provision for diving equipment.