The firm of Deschimag has put forward its own proposal for a vessel for overseas service in the tropics.
Deschimag Export Design K, German - Export Account Colonial Service Ship laid down 1943
Displacement: 1,705 t light; 1,845 t standard; 2,617 t normal; 3,236 t full load
Dimensions: Length overall / water x beam x draught
315.72 ft / 303.48 ft x 40.35 ft x 13.12 ft (normal load) [96.23 m / 92.50 m x 12.30 m x 4.00 m]
Armament:
4 - 5.04" / 128 mm guns (2x2 guns), 63.99lbs / 29.02kg shells, 1943 Model Dual purpose guns in deck mounts with hoists on centreline ends, evenly spread
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.55lbs / 0.70kg shells, 1938 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, 1938 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 260 lbs / 118 kg
Shells per gun, main battery: 600
Armour:
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.98" / 25 mm 0.98" / 25 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.20" / 5 mm - -
Conning tower: 1.97" / 50 mm
Machinery:
Diesel Internal combustion motors, Geared drive, 2 shafts, 11,503 shp / 8,581 Kw = 22.00 kts
Range 14,600nm at 15.00 kts
Bunker at max displacement = 1,391 tons
Complement: 182 - 237
Cost: £0.841 million / $3.366 million
Distribution of weights at normal displacement:
Armament: 33 tons, 1.2 %
Armour: 23 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 15 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 8 tons, 0.3 %
Machinery: 297 tons, 11.4 %
Hull, fittings & equipment: 802 tons, 30.6 %
Fuel, ammunition & stores: 913 tons, 34.9 %
Miscellaneous weights: 550 tons, 21.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 4,133 lbs / 1,875 Kg = 64.6 x 5.0 " / 128 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.5 ft / 0.5 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.09
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.570
Length to Beam Ratio: 7.52 : 1
'Natural speed' for length: 17.42 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 4.10 ft / 1.25 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 14.11 ft / 4.30 m
- Forecastle (20 %): 13.62 ft / 4.15 m (12.80 ft / 3.90 m aft of break)
- Mid (50 %): 12.30 ft / 3.75 m
- Quarterdeck (40 %): 12.30 ft / 3.75 m
- Stern: 12.80 ft / 3.90 m
- Average freeboard: 12.78 ft / 3.89 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 72.7 %
- Above water (accommodation/working, high = better): 113.8 %
Waterplane Area: 8,709 Square feet or 809 Square metres
Displacement factor (Displacement / loading): 183 %
Structure weight / hull surface area: 59 lbs/sq ft or 290 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.85
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Breakdown of Miscellaneous Weight
Accommodation for reinforced naval rifle company - 150 men - 300 tons
Recreational spaces - 50 tons
Expanded infirmary and medical facilities - 50 tons
Command and communications facilities - 50 tons
Radar suite - 20 tons
Provision for habitability in the tropics - air conditioning, ventilation, ice-making equipment etc - 50 tons
Reserved for future growth - 30 tons