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1

Friday, February 12th 2016, 11:59pm

German Merchant Designs for 1947

Repository for the subject matter

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Saturday, February 13th 2016, 12:01am

Leverkusen class Fast Cargo Liner



Leverkusen, German Fast Cargoliner laid down 1947

Displacement: 6,397 t light; 6,647 t standard; 12,510 t normal; 17,200 t full load

Dimensions: Length overall / water x beam x draught

490.58 ft / 465.88 ft x 60.70 ft x 24.93 ft (normal load) [149.53 m / 142.00 m x 18.50 m x 7.60 m]

Machinery:

Oil fired boilers, steam turbines, Geared drive, 1 shaft, 14,685 shp / 10,955 Kw = 19.00 kts
Range 48,000nm at 15.00 kts
Bunker at max displacement = 10,553 tons

Complement: 590 - 768

Cost: £1.998 million / $7.991 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 363 tons, 2.9 %
Hull, fittings & equipment: 4,034 tons, 32.2 %
Fuel, ammunition & stores: 6,113 tons, 48.9 %
Miscellaneous weights: 2,000 tons, 16.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 59,315 lbs / 26,905 Kg = 549.2 x 6 " / 152 mm shells or 7.7 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 2.8 ft / 0.9 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- 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: 0.621
Length to Beam Ratio: 7.68: 1
'Natural speed' for length: 21.58 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 45.93 ft / 14.00 m
- Forecastle (20 %): 42.65 ft / 13.00 m
- Mid (50 %): 31.17 ft / 9.50 m (29.53 ft / 9.00 m aft of break)
- Quarterdeck (15 %): 31.17 ft / 9.50 m
- Stern: 32.81 ft / 10.00 m
- Average freeboard: 35.29 ft / 10.76 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 28.4 %
- Above water (accommodation/working, high = better): 223.0 %
Waterplane Area: 20,700 Square feet or 1,923 Square metres
Displacement factor (Displacement / loading): 459 %
Structure weight / hull surface area: 78 lbs/sq ft or 382 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.78
- Longitudinal: 9.44
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

True radius 10,000 nm on bunkers of 2,286 tons. Additional bunkers used to sim low-stowed cargo - 8,200 tons

Breakdown of miscellaneous weight

Cargo handling gear - 400 tons
High-stowed and deck cargo - 1,600 tons

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Monday, February 15th 2016, 6:43pm

Sagaland class General Purpose Freighter



The Sagaland design was developed to carry a variety of cargos, including grain, ore, coal, or packaged and unitized cargo below deck, and timber and other heavy deck loads if required. Derricks are worked from four sets of kingposts rather than masts.

Sagaland, German General Purpose Freighter laid down 1947

Displacement: 7,200 t light; 7,490 t standard; 14,500 t normal; 20,108 t full load

Dimensions: Length overall / water x beam x draught

482.11 ft / 473.10 ft x 62.50 ft x 28.22 ft (normal load) [146.95 m / 144.20 m x 19.05 m x 8.60 m]

Machinery:

Diesel Internal combustion motors, Geared drive, 1 shaft, 6,779 shp / 5,057 Kw = 15.00 kts
Range 90,000nm at 12.00 kts
Bunker at max displacement = 12,618 tons

Complement: 659 - 858

Cost: £2.003 million / $8.013 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 167 tons, 1.2 %
Hull, fittings & equipment: 5,833 tons, 40.2 %
Fuel, ammunition & stores: 7,300 tons, 50.3 %
Miscellaneous weights: 1,200 tons, 8.3 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 98,217 lbs / 44,550 Kg = 909.4 x 6 " / 152 mm shells or 17.1 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 4.2 ft / 1.3 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 90 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.80

Hull form characteristics:

Hull has raised forecastle
Block coefficient: 0.608
Length to Beam Ratio: 7.57: 1
'Natural speed' for length: 21.75 kts
Power going to wave formation at top speed: 31 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.31 ft / 6.80 m
- Forecastle (10 %): 19.69 ft / 6.00 m (18.04 ft / 5.50 m aft of break)
- Mid (30 %): 16.40 ft / 5.00 m
- Quarterdeck (50 %): 16.40 ft / 5.00 m
- Stern: 16.40 ft / 5.00 m
- Average freeboard: 17.00 ft / 5.18 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 14.6 %
- Above water (accommodation/working, high = better): 103.7 %
Waterplane Area: 21,347 Square feet or 1,983 Square metres
Displacement factor (Displacement / loading): 945 %
Structure weight / hull surface area: 167 lbs/sq ft or 817 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.88
- Longitudinal: 3.12
- Overall: 1.98
Hull space for machinery, storage, compartmentation is excellent
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

True bunkers 2,212 tons for a radius of 15,000 nm. Additional bunkers simmed as low-stowed cargo, 10,000 tons.

Residual composite strength represents strengthened deck coamings and structure for carriage of heavy cargos.

Breakdown of miscellaneous weight:

Cargo handling gear - 450 tons
Anticipated deck cargo - 700 tons
Navigational equipment - 50 tons

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Tuesday, March 8th 2016, 3:30pm

Sassnitz class Short Sea Passenger-Cargo Vessel

Sassnitz, German Short-Sea Passenger-Cargo laid down 1947

Displacement: 2,500 t light; 2,557 t standard; 2,847 t normal; 3,079 t full load

Dimensions: Length overall / water x beam x draught

295.13 ft / 291.99 ft x 47.31 ft x 13.12 ft (normal load) [89.96 m / 89.00 m x 14.42 m x 4.00 m]

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 1,699 shp / 1,268 Kw = 13.50 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 522 tons

Complement: 19 - 25

Cost: £0.679 million / $2.716 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 42 tons, 1.5 %
Hull, fittings & equipment: 1,658 tons, 58.2 %
Fuel, ammunition & stores: 347 tons, 12.2 %
Miscellaneous weights: 800 tons, 28.1 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 945.1 lbs/428.7 Kg = 8.75 x 6”/152mm shells or .32 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.0 ft / 0.6 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.90

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 6.17: 1
'Natural speed' for length: 20.20 kts
Power going to wave formation at top speed: 36 %
Trim (Max stability = 0, Max steadiness = 100): 38
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 14.76 ft / 4.50 m
- Forecastle (25 %): 13.12 ft / 4.00 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (25 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 13.29 ft / 4.05 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 36.7 %
- Above water (accommodation/working, high = better): 129.3 %
Waterplane Area: 10,034 Square feet or 932 Square metres
Displacement factor (Displacement / loading): 322 %
Structure weight / hull surface area: 116 lbs/sq ft or 568 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.97
- Longitudinal: 4.05
- Overall: 2.12
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, rides out heavy weather easily

Low-stowed cargo simmed as additional bunkers; actual radius is 5,000 nm with bunkers of 152 tons (BAM 274 tons)

Breakdown of miscellaneous weight:

Provision for stern ramp aft - 50 tons
Provision for thirty six passengers - 360 tons
Provision for internal ventilation systems - 40 tons
Provision for deck cargo - 350 tons

Intended for passenger and cargo services between German Baltic ports and ports in the range Danzig-Petrograd and Stockholm-Helsinki. Fitted for carriage of palletized and trailer cargo; no deck gear, loaded and unloaded via stern ramps.

Crew complement and survivability reduced for commercial service.