WesWorld

Placeholder for information relating to light surface craft exclusive of mine warfare vessels

Mehrzweckboot Typ 1940, German General Purpose Escort laid down 1940

Displacement: 276 t light; 285 t standard; 314 t normal; 337 t full load

Dimensions: Length overall / water x beam x draught

188.02 ft / 170.60 ft x 20.67 ft x 6.23 ft (normal load) [57.31 m / 52.00 m x 6.30 m x 1.90 m]

Armament:

1 - 3.46" / 88.0 mm gun in single mount, 20.79lbs / 9.43kg shells, 1940 Model Anti-aircraft gun in deck mount on centreline forward
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.55lbs / 0.70kg shells, 1940 Model Anti-aircraft guns in deck mount on centreline amidships
4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1940 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 25 lbs / 11 kg
Shells per gun, main battery: 200
2 - 21" / 533 mm above water torpedoes

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 5,691 shp / 4,245 Kw = 24.00 kts, Range 2,000nm at 14.00 kts
Bunker at max displacement = 52 tons

Complement: 36 - 48

Cost: £0.191 million / $0.766 million

Distribution of weights at normal displacement:

Armament: 3 tons, 1.0 %
Machinery: 140 tons, 44.7 %
Hull, fittings & equipment: 117 tons, 37.3 %
Fuel, ammunition & stores: 38 tons, 12.2 %
Miscellaneous weights: 15 tons, 4.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 164 lbs / 74 Kg = 7.9 x 3.5 " / 88 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.13
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:

Hull has raised forecastle, rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 8.25: 1
'Natural speed' for length: 13.06 kts
Power going to wave formation at top speed: 73 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 13.12 ft / 4.00 m
- Forecastle (20 %): 11.15 ft / 3.40 m (10.83 ft / 3.30 m aft of break)
- Mid (50 %): 10.50 ft / 3.20 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: 10.51 ft / 3.20 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 157.7 %
- Above water (accommodation/working, high = better): 74.3 %
Waterplane Area: 2,349 Square feet or 218 Square metres
Displacement factor (Displacement / loading): 91 %
Structure weight / hull surface area: 23 lbs/sq ft or 113 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.61
- Longitudinal: 5.40
- Overall: 0.76
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

15 tons of miscellaneous weight reserved for A/S outfit - ASDIC, two A/S mortars (K-guns), and two racks for twenty-four 100 kg depth charges

Mehrzweckboot 1 – Laid down 1 July 1940; launched 25 August 1940; completed 7 November 1940
Mehrzweckboot 2 – Laid down 1 July 1940; launched 25 August 1940; completed 7 November 1940
Mehrzweckboot 3 – Laid down 1 October 1940; launched 25 November 1940; completed 7 Feb 1941
Mehrzweckboot 4 – Laid down 1 October 1940; launched 25 November 1940; completed 7 Feb 1941

Schnellboot Typ 1941



Tonnage – 93 tons (106 tons full load)
Dimensions – Length 34.94 metres; Beam 5.28 metres; Draft 1.67 metres
Machinery – Three shafts, Daimler-Benz diesel motors, BHP 7,500/6,000 = 41/38 knots. Bunker capacity 16.75 tons, radius 700 nm at 35 knots
Armament – Two 533mm torpedo tubes (fixed, forward firing) and four torpedoes; One twin 20mm FlaK38 forward of the cockpit, one twin 20mm FlaK38 aft amidships, one 37mm FlaK38 aft
Crew – 21

Note: Light armour plating to the vertical surfaces of the cockpit.

Construction:

S101 – S102: 3rd Quarter 1941
S103 – S104: 4th Quarter 1941
S105 – S106: 1st Quarter 1942
S107 – S108: 2nd Quarter 1942
S109 – S110: 3rd Quarter 1942
S111 – S112: 4th Quarter 1942

Pionier Motor Launch Typ 1941



Tonnage – 82 tons (130 tons full load)
Dimensions – Length 34.15 metres (oa); Beam 5.55 metres; Draft 2.30 metres.
Machinery – Two shafts, Maschinenfabrik Augsburg-Nurnberg diesel motors, BHP 1,200 = 19 knots. Bunker capacity 11 tons, radius 1,200 nm at 12 knots
Armament – One single 20mm Flak38 on the foredeck, one single 20mm Flak38 aft.
Crew – 16

Construction:

LS101 – LS102: 3rd Quarter 1941
LS103 – LS104: 4th Quarter 1941
LS105 – LS106: 1st Quarter 1942
LS107 – LS108: 2nd Quarter 1942
LS109 – LS110: 3rd Quarter 1942
LS111 – LS112: 4th Quarter 1942
LS113 – LS114: 1st Quarter 1943
LS115 – LS116: 2nd Quarter 1943
LS117 – LS118: 3rd Quarter 1943
LS119 – LS120: 4th Quarter 1943

Air-Sea Motor Rescue Launch Typ 1941



Tonnage: 25
Dimensions: 19.20 (pp) x 5.33 x 1.14 metres
Engines: Three shafts, three Daimler Benz marine diesels, 1,500 hp
Speed: 30 knots
Armament: None
Crew: 9

Construction:

HSB101 – HSB104: 3rd Quarter 1941
HSB105 – HSB108: 4th Quarter 1941
HSB109 – HSB112: 1st Quarter 1942
HSB113 – HSB116: 2nd Quarter 1942
HSB117 – HSB120: 3rd Quarter 1942
HSB121 – HSB124: 4th Quarter 1942

Seelöwe, German Coastal Escort laid down 1946

Displacement: 481 t light; 527 t standard; 610 t normal; 677 t full load

Dimensions: Length overall / water x beam x draught

239.07 ft / 229.66 ft x 24.93 ft x 7.38 ft (normal load) [72.87 m / 70.00 m x 7.60 m x 2.25 m]

Armament:

4 - 2.17" / 55.0 mm guns (2x2 guns), 5.08lbs / 2.30kg shells, 1945 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread, 1 raised mount
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1940 Model Anti-aircraft guns in deck mounts on side, all amidships
Weight of broadside 22 lbs / 10 kg
Shells per gun, main battery: 2,400

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.39" / 10 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Diesel Internal combustion engines plus batteries,
Electric cruising motors plus geared drives, 2 shafts, 4,246 shp / 3,168 Kw = 22.00 kts
Range 4,100nm at 15.00 kts
Bunker at max displacement = 150 tons

Complement: 60 - 79

Cost: £0.241 million / $0.965 million

Distribution of weights at normal displacement:

Armament: 3 tons, 0.5 %
Armour: 5 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 2 tons, 0.3 %
Machinery: 106 tons, 17.4 %
Hull, fittings & equipment: 277 tons, 45.4 %
Fuel, ammunition & stores: 129 tons, 21.1 %
Miscellaneous weights: 90 tons, 14.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,242 lbs / 564 Kg = 244.7 x 2.2 " / 55 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.90

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.505
Length to Beam Ratio: 9.21: 1
'Natural speed' for length: 17.40 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 37
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.86 ft / 5.75 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 9.84 ft / 3.00 m
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 12.78 ft / 3.90 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 82.2 %
- Above water (accommodation/working, high = better): 148.5 %
Waterplane Area: 3,986 Square feet or 370 Square metres
Displacement factor (Displacement / loading): 185 %
Structure weight / hull surface area: 33 lbs/sq ft or 161 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.83
- Longitudinal: 5.34
- 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, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weight

Navigational radar - 15 tons
Search and gun direction radar - 15 tons
Sonar and A/S detection gear - 20 tons
Ahead throwing AS weapon - 10 tons
Depth charge racks and mortars - 20 tons
Reserved for future growth - 10 tons


Seelöwe – Laid down 1 January 1946; Launched 24 February 1946; Completed 16 May 1946
Seeigel – Laid down 1 January 1946; Launched 24 February 1946; Completed 16 May 1946
Seehund - Laid down 1 April 1946; Launched 25 May 1946; Completed 14 August 1946
Seepferd - Laid down 1 April 1946; Launched 25 May 1946; Completed 14 August 1946

Alpenföhn, German Coastal Escort laid down 1949

Displacement: 480 t light; 507 t standard; 592 t normal; 660 t full load

Dimensions: Length overall / water x beam x draught

237.48 ft / 229.66 ft x 24.93 ft x 7.38 ft (normal load) [72.38 m / 70.00 m x 7.60 m x 2.25 m]

Armament:

2 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1949 Model Automatic rapid fire guns in deck mounts with hoists on centerline ends, evenly spread
4 - 1.18" / 30.0 mm guns (2x2 guns), 0.82lbs / 0.37kg shells, 1949 Model Anti-aircraft guns in deck mounts on side, all amidships
Weight of broadside 29 lbs / 13 kg
Shells per gun, main battery: 840

Armor:

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.39" / 10 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 6,934 shp / 5,173 Kw = 25.00 kts
Range 4,400nm at 15.00 kts
Bunker at max displacement = 153 tons

Complement: 59 - 77

Cost: £0.335 million / $1.340 million

Distribution of weights at normal displacement:

Armament: 4 tons, 0.7 %
Armor: 5 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.6 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 168 tons, 28.3 %
Hull, fittings & equipment: 203 tons, 34.3 %
Fuel, ammunition & stores: 112 tons, 18.9 %
Miscellaneous weights: 100 tons, 16.9 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 484 lbs / 219 Kg = 37.6 x 3.0 " / 75 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.7 ft / 0.2 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 63 %
- Recoil effect (Restricted arc if above 1.00): 0.14
Seaboat quality (Average = 1.00): 1.30

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.490
Length to Beam Ratio: 9.21: 1
'Natural speed' for length: 17.43 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.03 ft / 5.80 m
- Forecastle (20 %): 18.70 ft / 5.70 m
- Mid (20 %): 18.70 ft / 5.70 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (40 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 12.17 ft / 3.71 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 118.1 %
- Above water (accommodation/working, high = better): 133.2 %
Waterplane Area: 3,931 Square feet or 365 Square meters
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 26 lbs/sq ft or 125 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.61
- Longitudinal: 3.42
- Overall: 0.73
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

Breakdown of Miscellaneous Weight

Navigational radar - 15 tons
Search and gun direction radar - 15 tons
Sonar and A/S detection gear - 20 tons
Ahead throwing AS weapon - 20 tons
Depth charge racks and mortars - 20 tons


Alpenföhn – Laid down 1 January 1949, launched 10 March 1949; Completed 16 May 1949
Höllentäler – Laid down 1 January 1949, launched 10 March 1949; Completed 16 May 1949
Ostwind - Laid down 1 April 1949; Launched 8 June 1949; Completed 14 August 1949
Passat - Laid down 1 April 1949; Launched 8 June 1949; Completed 14 August 1949
Auster - Laid down 1 July 1949; Launched 7 September 1949; Completed 13 November 1949
Chamsin - Laid down 1 July 1949; Launched 7 September 1949; Completed 13 November 1949
Rossbreiten - Laid down 1 October 1949; Launched 8 December 1949; Completed 13 February 1950
Kaskasi - Laid down 1 October 1949; Launched 8 December 1949; Completed 13 February1950
Brüscha - Laid down 1 January 1950
Fallbö - Laid down 1 January 1950