WesWorld

One of the suggestions for future DKM construction in the post-1936 period was coast defence ships, a class of vessels the DKM has so far avoided. Here's a couple possibilities for comment.

Wotan, German Coast Defence Ship laid down 1937

Displacement:
8,805 t light; 9,433 t standard; 9,747 t normal; 9,998 t full load

Dimensions: Length overall / water x beam x draught
393.70 ft / 393.70 ft x 65.62 ft (Bulges 75.46 ft) x 20.51 ft (normal load)
120.00 m / 120.00 m x 20.00 m (Bulges 23.00 m) x 6.25 m

Armament:
6 - 11.14" / 283 mm guns (3x2 guns), 727.53lbs / 330.00kg shells, 1937 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
2 - 5.04" / 128 mm guns (1x2 guns), 63.99lbs / 29.03kg shells, 1937 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
8 - 5.04" / 128 mm guns (4x2 guns), 63.99lbs / 29.03kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1937 Model
Machine guns in deck mounts
on side, evenly spread, 2 raised mounts
Weight of broadside 5,044 lbs / 2,288 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.45" / 240 mm 295.28 ft / 90.00 m 10.66 ft / 3.25 m
Ends: Unarmoured
Main Belt covers 115 % of normal length

- Torpedo Bulkhead and Bulges:
2.36" / 60 mm 255.91 ft / 78.00 m 18.37 ft / 5.60 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 280 mm 5.91" / 150 mm 9.45" / 240 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
4th: 0.79" / 20 mm 0.39" / 10 mm -

- Armour deck: 2.76" / 70 mm, Conning tower: 11.02" / 280 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 20,276 shp / 15,126 Kw = 21.00 kts
Range 6,000nm at 10.00 kts
Bunker at max displacement = 564 tons

Complement:
489 - 637

Cost:
£4.875 million / $19.501 million

Distribution of weights at normal displacement:
Armament: 603 tons, 6.2 %
Armour: 3,653 tons, 37.5 %
- Belts: 1,263 tons, 13.0 %
- Torpedo bulkhead: 411 tons, 4.2 %
- Armament: 943 tons, 9.7 %
- Armour Deck: 928 tons, 9.5 %
- Conning Tower: 108 tons, 1.1 %
Machinery: 562 tons, 5.8 %
Hull, fittings & equipment: 3,856 tons, 39.6 %
Fuel, ammunition & stores: 942 tons, 9.7 %
Miscellaneous weights: 130 tons, 1.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,960 lbs / 5,879 Kg = 18.7 x 11.1 " / 283 mm shells or 3.3 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 3.2 ft / 1.0 m
Roll period: 17.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.560
Length to Beam Ratio: 5.22 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 13.94 ft / 4.25 m
- Mid (50 %): 13.94 ft / 4.25 m
- Quarterdeck (15 %): 13.94 ft / 4.25 m
- Stern: 13.94 ft / 4.25 m
- Average freeboard: 14.67 ft / 4.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.0 %
- Above water (accommodation/working, high = better): 98.8 %
Waterplane Area: 18,199 Square feet or 1,691 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 144 lbs/sq ft or 702 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.95
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate

30 tons reserved for radar

100 tons reserved for growth


Wotan II, German Coast Defence Ship laid down 1937

Displacement:
15,774 t light; 16,828 t standard; 17,331 t normal; 17,734 t full load

Dimensions: Length overall / water x beam x draught
492.13 ft / 492.13 ft x 82.02 ft (Bulges 95.14 ft) x 22.15 ft (normal load)
150.00 m / 150.00 m x 25.00 m (Bulges 29.00 m) x 6.75 m

Armament:
6 - 14.96" / 380 mm guns (3x2 guns), 1,984.16lbs / 900.00kg shells, 1933 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
2 - 5.04" / 128 mm guns (1x2 guns), 63.99lbs / 29.02kg shells, 1936 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
8 - 5.04" / 128 mm guns (4x2 guns), 63.99lbs / 29.02kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1937 Model
Machine guns in deck mounts
on side, evenly spread, 2 raised mounts
Weight of broadside 12,584 lbs / 5,708 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.0" / 280 mm 328.08 ft / 100.00 m 10.66 ft / 3.25 m
Ends: Unarmoured
Main Belt covers 103 % of normal length

- Torpedo Bulkhead and Bulges:
2.36" / 60 mm 255.91 ft / 78.00 m 18.37 ft / 5.60 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.8" / 350 mm 8.27" / 210 mm 9.45" / 240 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
4th: 0.79" / 20 mm 0.39" / 10 mm -

- Armour deck: 3.54" / 90 mm, Conning tower: 11.02" / 280 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 27,214 shp / 20,302 Kw = 21.00 kts
Range 6,500nm at 10.00 kts
Bunker at max displacement = 905 tons

Complement:
754 - 981

Cost:
£9.729 million / $38.917 million

Distribution of weights at normal displacement:
Armament: 1,341 tons, 7.7 %
Armour: 5,721 tons, 33.0 %
- Belts: 1,688 tons, 9.7 %
- Torpedo bulkhead: 411 tons, 2.4 %
- Armament: 1,555 tons, 9.0 %
- Armour Deck: 1,908 tons, 11.0 %
- Conning Tower: 159 tons, 0.9 %
Machinery: 754 tons, 4.4 %
Hull, fittings & equipment: 7,808 tons, 45.1 %
Fuel, ammunition & stores: 1,558 tons, 9.0 %
Miscellaneous weights: 150 tons, 0.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,064 lbs / 9,554 Kg = 12.6 x 15.0 " / 380 mm shells or 4.5 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 4.6 ft / 1.4 m
Roll period: 18.7 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.585
Length to Beam Ratio: 5.17 : 1
'Natural speed' for length: 22.18 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 14.76 ft / 4.50 m
- Mid (50 %): 14.76 ft / 4.50 m
- Quarterdeck (15 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 15.42 ft / 4.70 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.8 %
- Above water (accommodation/working, high = better): 108.6 %
Waterplane Area: 29,110 Square feet or 2,704 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 194 lbs/sq ft or 947 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.61
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate

30 tons reserved for radar

120 tons reserved for growth

120m for the first design seems a bit short for three turrets....?! Have you checked a deckplan?

I got the Sentinel to work in 120m.......

I see. Thanks for posting.

To me she looks quite cramped despite buying room due to a broad beam. Those side turrets and magazin spaces needed for them are a designers nightmare I suppose.

Me wonders how much noise, vibrations and fumes from that stack/bridge combination causes troubles to the commanding crew. Her bridge must be an awful place to work at....

Coastal Defence against whom? A couple of gunboats to keep the Belgians at bay over the Rhine should suffice. There's a bit more coastline thats practicable to defend in the Baltic but probably not at that cost.

Keeping the Belgians at bay is always a good idea, just ask the Kongolese.