Auxiliaries

The Rock Doctor · April 18, 2020, 09:04:20 AM

I suppose I should build some.

The Rock Doctor · April 18, 2020, 09:05:08 AM

Rosadny Class Depot Ship

Rosadny, laid down 1912
Ostrozny, laid down 1912

AS REFITTED 1931

Enter ship name, Enter country Enter ship type laid down 1912, refit 1931

Displacement:
4,480 t light; 4,615 t standard; 5,247 t normal; 5,752 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(338.70 ft / 328.08 ft) x 65.62 ft x (13.12 / 14.20 ft)
(103.23 m / 100.00 m) x 20.00 m x (4.00 / 4.33 m)

Armament:
2 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 400 per gun
Dual purpose guns in deck mounts, 1912 Model
2 x Single mounts on centreline ends, evenly spread
2 raised mounts
4 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
Anti-air guns in deck mounts, 1912 Model
2 x Twin mounts on centreline, forward deck aft
2 raised mounts
8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
Machine guns in deck mounts, 1912 Model
4 x Twin mounts on sides, evenly spread
4 double raised mounts
Weight of broadside 79 lbs / 36 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm - -
2nd: 0.59" / 15 mm - -
3rd: 0.59" / 15 mm - -

Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 2,010 ihp / 1,500 Kw = 12.19 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 1,137 tons (90% coal)

Complement:
307 - 400

Cost:
£0.180 million / $0.720 million

Distribution of weights at normal displacement:
Armament: 17 tons, 0.3%
- Guns: 17 tons, 0.3%
Armour: 7 tons, 0.1%
- Armament: 7 tons, 0.1%
Machinery: 132 tons, 2.5%
Hull, fittings & equipment: 1,463 tons, 27.9%
Fuel, ammunition & stores: 767 tons, 14.6%
Miscellaneous weights: 2,861 tons, 54.5%
- Hull below water: 900 tons
- Hull above water: 1,000 tons
- On freeboard deck: 911 tons
- Above deck: 50 tons

Fittings:
-2,800 t: Support for 28,000 t of shipping (BW/AW/FD)
-25 t: L/R wireless (AD)
-2 t: 1924 fire control (AD)
-11 + 23 t: Weight reserve (FD/AD)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,939 lbs / 6,776 Kg = 489.6 x 3.9 " / 100 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.47
Metacentric height 5.2 ft / 1.6 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.659
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00%, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Forward deck: 30.00%, 15.09 ft / 4.60 m, 15.09 ft / 4.60 m
- Aft deck: 35.00%, 15.09 ft / 4.60 m, 15.09 ft / 4.60 m
- Quarter deck: 15.00%, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 17.85 ft / 5.44 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 50.0%
- Above water (accommodation/working, high = better): 154.4%
Waterplane Area: 16,492 Square feet or 1,532 Square metres
Displacement factor (Displacement / loading): 165%
Structure weight / hull surface area: 67 lbs/sq ft or 326 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.13
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Warning: Date too early for dual purpose gun - Main Battery

AS BUILT

Enter ship name, Enter country Enter ship type laid down 1912

Displacement:
4,504 t light; 4,615 t standard; 5,247 t normal; 5,752 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(338.70 ft / 328.08 ft) x 65.62 ft x (13.12 / 14.20 ft)
(103.23 m / 100.00 m) x 20.00 m x (4.00 / 4.33 m)

Armament:
2 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 150 per gun
Quick firing guns in deck mounts, 1912 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
4 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 15,000 per gun
Machine guns in deck mounts, 1912 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 62 lbs / 28 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm 0.79" / 20 mm -
2nd: 0.20" / 5 mm - -

Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 2,010 ihp / 1,500 Kw = 12.19 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 1,137 tons (90% coal)

Complement:
307 - 400

Cost:
£0.179 million / $0.717 million

Distribution of weights at normal displacement:
Armament: 11 tons, 0.2 %
- Guns: 11 tons, 0.2 %
Armour: 11 tons, 0.2 %
- Armament: 11 tons, 0.2 %
Machinery: 132 tons, 2.5 %
Hull, fittings & equipment: 1,463 tons, 27.9 %
Fuel, ammunition & stores: 743 tons, 14.2 %
Miscellaneous weights: 2,888 tons, 55.0 %
- Hull below water: 900 tons
- Hull above water: 1,000 tons
- On freeboard deck: 938 tons
- Above deck: 50 tons

Fittings:
-25 t: LR Wireless
-53 t: Weight reserve
-2,800 t: Fleet support function (supports 28,000 t)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,124 lbs / 6,860 Kg = 495.7 x 3.9 " / 100 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.47
Metacentric height 5.1 ft / 1.6 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.659
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Forward deck: 30.00 %, 15.09 ft / 4.60 m, 15.09 ft / 4.60 m
- Aft deck: 35.00 %, 15.09 ft / 4.60 m, 15.09 ft / 4.60 m
- Quarter deck: 15.00 %, 22.97 ft / 7.00 m, 22.97 ft / 7.00 m
- Average freeboard: 17.85 ft / 5.44 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 49.3 %
- Above water (accommodation/working, high = better): 154.4 %
Waterplane Area: 16,492 Square feet or 1,532 Square metres
Displacement factor (Displacement / loading): 164 %
Structure weight / hull surface area: 67 lbs/sq ft or 325 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.12
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Rock Doctor · April 18, 2020, 09:05:50 AM

Wesoly Class Depot Ship

Wesoly, laid down 1912, scrapped 1933
Dziarski, laid down 1912
Przyjemne, laid down 1912
Czuly, laid down 1912

Enter ship name, Enter country Enter ship type laid down 1912

Displacement:
2,701 t light; 2,774 t standard; 3,358 t normal; 3,825 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(272.50 ft / 262.47 ft) x 52.49 ft x (13.12 / 14.67 ft)
(83.06 m / 80.00 m) x 16.00 m x (4.00 / 4.47 m)

Armament:
2 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 150 per gun
Quick firing guns in deck mounts, 1912 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
4 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 15,000 per gun
Machine guns in deck mounts, 1912 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 62 lbs / 28 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm 0.79" / 20 mm -
2nd: 0.20" / 5 mm - -

Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 1,978 ihp / 1,476 Kw = 13.03 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 1,051 tons (90% coal)

Complement:
219 - 286

Cost:
£0.116 million / $0.463 million

Distribution of weights at normal displacement:
Armament: 11 tons, 0.3 %
- Guns: 11 tons, 0.3 %
Armour: 11 tons, 0.3 %
- Armament: 11 tons, 0.3 %
Machinery: 130 tons, 3.9 %
Hull, fittings & equipment: 816 tons, 24.3 %
Fuel, ammunition & stores: 657 tons, 19.6 %
Miscellaneous weights: 1,733 tons, 51.6 %
- Hull below water: 600 tons
- Hull above water: 540 tons
- On freeboard deck: 543 tons
- Above deck: 50 tons

Fittings:
-25 t: LR Wireless
-108 t: Weight reserve
-1,600 t: Fleet support function (supports 16,000 t)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,009 lbs / 3,633 Kg = 262.5 x 3.9 " / 100 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 3.5 ft / 1.1 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.662
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 16.20 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Forward deck: 30.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
- Aft deck: 35.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
- Quarter deck: 15.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Average freeboard: 14.57 ft / 4.44 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 51.5 %
- Above water (accommodation/working, high = better): 108.4 %
Waterplane Area: 10,555 Square feet or 981 Square metres
Displacement factor (Displacement / loading): 165 %
Structure weight / hull surface area: 56 lbs/sq ft or 273 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.31
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Rock Doctor · October 03, 2020, 07:21:11 PM

Zackwycajacy Class Depot Ship

A small coastal or riverine depot ship. The midships freeboard reflects living and working space for small-craft crews. The low freeboard aft facilitates crew and cargo transfer. The armament is about dealing with small craft and infantry threats rather than actual warships.

Zackwycajacy, laid down 1914

Enter ship name, Enter country Enter ship type laid down 1914

Displacement:
1,203 t light; 1,232 t standard; 1,304 t normal; 1,362 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(299.23 ft / 295.28 ft) x 42.65 ft x (5.58 / 5.79 ft)
(91.20 m / 90.00 m) x 13.00 m x (1.70 / 1.76 m)

Armament:
4 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 250 per gun
Quick firing guns in deck mounts, 1914 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
4 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 15,000 per gun
Machine guns in deck mounts, 1914 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
2 x Single mounts on sides amidships
2 raised mounts
Weight of broadside 16 lbs / 7 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm 0.20" / 5 mm -
2nd: 0.20" / 5 mm - -

Machinery:
Coal fired boilers, steam turbines,
Direct drive, 2 shafts, 603 shp / 450 Kw = 10.61 kts
Range 2,000nm at 10.00 kts
Bunker at max displacement = 130 tons (100% coal)

Complement:
108 - 141

Cost:
£0.059 million / $0.237 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.3 %
- Guns: 3 tons, 0.3 %
Armour: 7 tons, 0.5 %
- Armament: 7 tons, 0.5 %
Machinery: 26 tons, 2.0 %
Hull, fittings & equipment: 626 tons, 48.0 %
Fuel, ammunition & stores: 102 tons, 7.8 %
Miscellaneous weights: 541 tons, 41.5 %
- Hull below water: 100 tons
- Hull above water: 100 tons
- On freeboard deck: 316 tons
- Above deck: 25 tons

Fittings:
-250 t: Accommodation for 125 personnel
-100 t: "Supply" for 1,000 t of smaller craft
-100 t: Crew amenities, sick bay, etc.
-50 t: Cranes and cargo handling gear
-25 t: L/R Wireless
-15 t: Weight reserve
-1 t: 1908 FC, such as it would be.

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,059 lbs / 5,924 Kg = 3,424.0 x 2.0 " / 50 mm shells or 4.9 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.2 ft / 0.7 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.53

Hull form characteristics:
Hull has low forecastle, rise forward of midbreak, low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.654
Length to Beam Ratio: 6.92 : 1
'Natural speed' for length: 17.18 kts
Power going to wave formation at top speed: 21 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 1.00 ft / 0.30 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.73 ft / 5.10 m, 12.80 ft / 3.90 m
- Forward deck: 30.00 %, 20.67 ft / 6.30 m, 20.67 ft / 6.30 m
- Aft deck: 30.00 %, 12.80 ft / 3.90 m, 12.80 ft / 3.90 m
- Quarter deck: 20.00 %, 4.92 ft / 1.50 m, 4.92 ft / 1.50 m
- Average freeboard: 13.90 ft / 4.24 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 25.5 %
- Above water (accommodation/working, high = better): 284.7 %
Waterplane Area: 9,648 Square feet or 896 Square metres
Displacement factor (Displacement / loading): 215 %
Structure weight / hull surface area: 49 lbs/sq ft or 238 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.78
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Rock Doctor · April 06, 2021, 01:49:44 PM

Borys Class Sealift Ship

Given the length of its sealanes and the short range of some of its coastal defence stuff, the Union's going to build a couple of auxiliaries specifically designed to move small warships and submarines around from port to port.

Which, to be clear, does not include a combat-deployment mode. They'll need the port facilities to load and unload the cargo.

The length and beam of the mid-deck is sufficient to accommodate 2 x 500 t or 3 x 250 t submarines, or six 40 t MTB, or some as-yet undetermined quantity of 20 t MTB. Small river craft would also be transportable, but the submarines were the largest cargo and the design target.

The ship is otherwise lightly armed for anti-boarding purposes, long-legged and reasonably mobile. Two units - Borys and Ledeper - will be named after Union folk heroes.

Note: Deck cargo is SM U-9, which I'm using to approximate our 500 t boats.

Borys, laid down 1916
Ledeper, laid down 1916

Borys the Boat Mover, laid down 1916

Displacement:
3,399 t light; 3,479 t standard; 3,856 t normal; 4,158 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(326.87 ft / 321.52 ft) x 49.21 ft x (13.12 / 14.00 ft)
(99.63 m / 98.00 m) x 15.00 m x (4.00 / 4.27 m)

Armament:
4 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 250 per gun
Quick firing guns in deck mounts, 1916 Model
4 x Single mounts on side ends, evenly spread
4 raised mounts
4 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 4,000 per gun
Machine guns in deck mounts, 1916 Model
4 x Single mounts on side ends, evenly spread
4 raised mounts
Weight of broadside 16 lbs / 7 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 6,702 shp / 5,000 Kw = 17.94 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 679 tons

Complement:
244 - 318

Cost:
£0.253 million / $1.014 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.1 %
- Guns: 3 tons, 0.1 %
Armour: 14 tons, 0.4 %
- Armament: 14 tons, 0.4 %
Machinery: 250 tons, 6.5 %
Hull, fittings & equipment: 1,008 tons, 26.1 %
Fuel, ammunition & stores: 457 tons, 11.9 %
Miscellaneous weights: 2,124 tons, 55.1 %
- Hull above water: 1,000 tons
- On freeboard deck: 1,099 tons
- Above deck: 25 tons

Fittings:
-1,000 t: Deck cargo on deck
-1,099 t: Bracing, ballast and such to keep the deck cargo in place
-25 t: L/R wireless

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,879 lbs / 4,027 Kg = 2,328.0 x 2.0 " / 50 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 2.3 ft / 0.7 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.82

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.657
Length to Beam Ratio: 6.53 : 1
'Natural speed' for length: 17.93 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Forward deck: 40.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Aft deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Average freeboard: 15.49 ft / 4.72 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 50.6 %
- Above water (accommodation/working, high = better): 124.2 %
Waterplane Area: 12,121 Square feet or 1,126 Square metres
Displacement factor (Displacement / loading): 146 %
Structure weight / hull surface area: 57 lbs/sq ft or 280 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.76
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Rock Doctor · April 06, 2021, 01:52:50 PM

Wytrwalosc class Depot Ship

With the Union contemplating overseas deployment of motor torpedo-boats, a depot ship would be useful to take care of the little bastards. This design would fit within auxiliary standards and provide sufficient capability for forty 20 t boats or twenty 40 t boats.

Technically I could get by with 80 t to provide out-of-port supply for a similar quantity of vessels but this doesn't feel especially accurate to me. And it's not like I can't afford to build a tender for 748 t.

Wytrwalosc, laid down 1916
Witalnosc, laid down 1916
Cierpliwosc, laid down 1917
Zywotnosc, laid down 1917

Enter ship name, Enter country Enter ship type laid down 1916

Displacement:
2,991 t light; 3,078 t standard; 3,301 t normal; 3,480 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(327.79 ft / 318.24 ft) x 55.77 ft x (10.17 / 10.64 ft)
(99.91 m / 97.00 m) x 17.00 m x (3.10 / 3.24 m)

Armament:
2 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
Quick firing guns in deck and hoist mounts, 1916 Model
2 x Single mounts on centreline, evenly spread
2 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 150 per gun
Anti-air guns in deck mounts, 1916 Model
2 x Single mounts on sides amidships
2 raised mounts
4 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 15,000 per gun
Machine guns in deck mounts, 1916 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 143 lbs / 65 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 1 shaft, 6,702 shp / 5,000 Kw = 18.15 kts
Range 6,000nm at 10.00 kts
Bunker at max displacement = 402 tons

Complement:
217 - 283

Cost:
£0.250 million / $1.002 million

Distribution of weights at normal displacement:
Armament: 38 tons, 1.2 %
- Guns: 38 tons, 1.2 %
Armour: 22 tons, 0.7 %
- Armament: 22 tons, 0.7 %
Machinery: 250 tons, 7.6 %
Hull, fittings & equipment: 1,301 tons, 39.4 %
Fuel, ammunition & stores: 310 tons, 9.4 %
Miscellaneous weights: 1,381 tons, 41.8 %
- Hull below water: 421 tons
- Hull above water: 640 tons
- On freeboard deck: 240 tons
- Above deck: 80 tons

Fittings:
-640 t: Accommodation for 320 personnel (below deck)
-420 t: Expendables (fuel, torpedoes, ammunition) (below water)
-100 t: Crew amenities (on deck)
-100 t: Workshop and parts stores (on deck)
-25 t: LR Wireless (above deck)
-25 t: Medical Facility (on deck)
-50 t: Flag facilities (above deck)
-4 t: 1912 Fire control (above deck)
-17 t: Weight reserve

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10,468 lbs / 4,748 Kg = 156.2 x 5.1 " / 130 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.42
Metacentric height 3.8 ft / 1.2 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.640 / 0.645
Length to Beam Ratio: 5.71 : 1
'Natural speed' for length: 17.84 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 4.92 ft / 1.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 26.25 ft / 8.00 m, 21.33 ft / 6.50 m
- Forward deck: 30.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
- Aft deck: 35.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
- Quarter deck: 15.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
- Average freeboard: 21.72 ft / 6.62 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64.4 %
- Above water (accommodation/working, high = better): 248.3 %
Waterplane Area: 13,264 Square feet or 1,232 Square metres
Displacement factor (Displacement / loading): 163 %
Structure weight / hull surface area: 64 lbs/sq ft or 313 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 4.20
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Rock Doctor · January 28, 2022, 07:21:11 PM

Vellamo Class Salvage Tug

An armed tug for salvage, rescue, and other duties like moving floating drydocks around.

Comes equipped with a couple of water cannons ("fire monitor" appears to be the technical term) and towing gear. The bow is lightly armored for pushing ships around.

I'd build some to commercial standards, notionally.

Vellamo, laid down 1921
Paivatar, laid down 1921
Kuutar, laid down 1922
Ukko, laid down 1922
Vainamoinen, laid down 1923
Vedenemo, laid down 1923

Enter ship name, Enter country Enter ship type laid down 1921

Displacement:
1,009 t light; 1,037 t standard; 1,199 t normal; 1,328 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(200.13 ft / 196.85 ft) x 36.09 ft x (9.84 / 10.71 ft)
(61.00 m / 60.00 m) x 11.00 m x (3.00 / 3.26 m)

Armament:
1 - 3.94" / 100 mm 45.0 cal gun - 30.77lbs / 13.96kg shells, 250 per gun
Quick firing gun in deck mount, 1921 Model
1 x Single mount on centreline, forward deck centre
3 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 4,000 per gun
Machine guns in deck mounts, 1921 Model
1 x Single mount on centreline, aft deck forward
1 raised mount
2 x Single mounts on sides amidships
2 raised mounts
Weight of broadside 31 lbs / 14 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Ends: 0.98" / 25 mm 16.40 ft / 5.00 m 11.81 ft / 3.60 m
180.45 ft / 55.00 m Unarmoured ends

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 4,021 shp / 3,000 Kw = 17.95 kts
Range 10,000nm at 10.00 kts
But 19,000 nm @10.00 kts with diesel, electric efficiencies factored in
Bunker at max displacement = 290 tons

Complement:
101 - 132

Cost:
£0.143 million / $0.573 million

Distribution of weights at normal displacement:
Armament: 6 tons, 0.5 %
- Guns: 6 tons, 0.5 %
Armour: 13 tons, 1.1 %
- Belts: 7 tons, 0.6 %
- Armament: 6 tons, 0.5 %
Machinery: 138 tons, 11.6 %
Hull, fittings & equipment: 361 tons, 30.1 %
Fuel, ammunition & stores: 190 tons, 15.8 %
Miscellaneous weights: 491 tons, 41.0 %
- Hull below water: 76 tons
- Hull above water: 90 tons
- On freeboard deck: 300 tons
- Above deck: 25 tons

Fittings:
-25 t: L/R wireless (AD)
-250 t: Towing and salvage stuff, including two fire monitors (FD)
-50 t: Pumps and stuff for salvage (AW)
-90 t: Weight reserve
-76 t: Diesel and electric machinery (BW)
-

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,003 lbs / 1,362 Kg = 98.4 x 3.9 " / 100 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 1.6 ft / 0.5 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 1.26

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.600 / 0.611
Length to Beam Ratio: 5.45 : 1
'Natural speed' for length: 14.03 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.36 ft / 5.90 m, 16.40 ft / 5.00 m
- Forward deck: 30.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Aft deck: 35.00 %, 8.53 ft / 2.60 m, 8.53 ft / 2.60 m
- Quarter deck: 15.00 %, 8.53 ft / 2.60 m, 10.50 ft / 3.20 m
- Average freeboard: 12.85 ft / 3.92 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 55.2 %
- Above water (accommodation/working, high = better): 119.2 %
Waterplane Area: 5,196 Square feet or 483 Square metres
Displacement factor (Displacement / loading): 151 %
Structure weight / hull surface area: 45 lbs/sq ft or 220 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 3.64
- Overall: 1.05
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room
Good seaboat, rides out heavy weather easily

The Rock Doctor · April 05, 2022, 07:06:59 PM

Marakaaya Class Oiler

A small oiler to support Union operations in the Atlantic and eastern Pacific. This isn't going to be powering battlegroups along or solving the world cruise supply problem. It would, however, carry enough oil to more or less fill a protected cruiser or top up a quartet of torpedo-boats if they happen to be doing extended work away from port.

The ship's length and draft also allow use of small docks and shallower harbours away from the Union's primary ports, if that happens to be an issue.

The ship has a fairly large bunker of its own, and efficient machinery, allowing for a large cruise radius. The powerplant allows her to run at fifteen knots on less than half power.

The class would be built to civilian standards.

Marakaaya, laid down 1922
Ladoga, laid down 1922
Pejpus, laid down 1923
Pskov, laid down 1923

Enter ship name, Enter country Enter ship type laid down 1922

Displacement:
2,999 t light; 3,091 t standard; 3,678 t normal; 4,148 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(311.87 ft / 304.13 ft) x 42.65 ft x (18.04 / 19.86 ft)
(95.06 m / 92.70 m) x 13.00 m x (5.50 / 6.05 m)

Armament:
1 - 5.12" / 130 mm 45.0 cal gun - 67.61lbs / 30.67kg shells, 250 per gun
Quick firing gun in deck and hoist mount, 1922 Model
1 x Single mount on centreline, aft deck aft
2 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
Anti-air guns in deck mounts, 1922 Model
1 x Single mount on centreline, forward deck forward
1 x Single mount on centreline, aft deck centre
1 raised mount
4 - 0.39" / 10.0 mm 45.0 cal guns - 0.03lbs / 0.01kg shells, 4,000 per gun
Machine guns in deck mounts, 1922 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 129 lbs / 59 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -

Machinery:
Oil fired boilers, steam turbines,
Electric cruising motors plus geared drives, 2 shafts, 6,703 shp / 5,000 Kw = 18.28 kts
Range 20,000nm at 10.00 kts (25,000 nm with geared/electric boni)
Bunker at max displacement = 1,057 tons

Complement:
236 - 307

Cost:
£0.399 million / $1.596 million

Distribution of weights at normal displacement:
Armament: 30 tons, 0.8 %
- Guns: 30 tons, 0.8 %
Armour: 11 tons, 0.3 %
- Armament: 11 tons, 0.3 %
Machinery: 227 tons, 6.2 %
Hull, fittings & equipment: 938 tons, 25.5 %
Fuel, ammunition & stores: 679 tons, 18.5 %
Miscellaneous weights: 1,793 tons, 48.7 %
- Hull below water: 757 tons
- Hull above water: 750 tons
- On freeboard deck: 200 tons
- Above deck: 86 tons

Fittings:
-25 t: L/R wireless (AD)
-40 t: Accommodation for 20 passengers (AD)
-21 t: Weight reserve/mail (AD)
-100 t: Dry stores (FD)
-100 t: Oiling gear (FD)
-1,450 t: Fuel oil cargo (BW/AW)
-57 t: Electric drive (BW)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,248 lbs / 2,834 Kg = 93.2 x 5.1 " / 130 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 2.1 ft / 0.6 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, rise aft of midbreak, low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.550 / 0.564
Length to Beam Ratio: 7.13 : 1
'Natural speed' for length: 17.44 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 25.26 ft / 7.70 m, 21.33 ft / 6.50 m
- Forward deck: 45.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
- Aft deck: 15.00 %, 21.33 ft / 6.50 m, 21.33 ft / 6.50 m
- Quarter deck: 25.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
- Average freeboard: 16.05 ft / 4.89 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.1 %
- Above water (accommodation/working, high = better): 112.7 %
Waterplane Area: 9,053 Square feet or 841 Square metres
Displacement factor (Displacement / loading): 157 %
Structure weight / hull surface area: 59 lbs/sq ft or 286 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 3.11
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The Rock Doctor · August 02, 2022, 07:19:33 PM

Vanem Class Oiler

As opposed to the recent 3,000 t oiler, this one does not feature an electric drive. On the other hand, it carries much more oil, both for itself and for its clients.

It's one of the first designs to roll out the new 15mm/90cal machine-gun for local defensive functions, which is exciting.

Vanem, laid down 1923
Mirim, laid down 1924

Enter ship name, Enter country Enter ship type laid down 1923

Displacement:
8,992 t light; 9,234 t standard; 10,683 t normal; 11,842 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(419.60 ft / 410.11 ft) x 65.62 ft x (25.26 / 27.42 ft)
(127.89 m / 125.00 m) x 20.00 m x (7.70 / 8.36 m)

Armament:
2 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 250 per gun
Quick firing guns in deck and hoist mount, 1923 Model
1 x 2-gun mount on centreline, aft deck centre
2 - 3.94" / 100 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 250 per gun
Anti-air guns in deck mounts, 1923 Model
1 x Single mount on centreline, forward deck centre
1 x Single mount on centreline, aft deck centre
1 raised mount
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
Machine guns in deck mounts, 1923 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
Weight of broadside 197 lbs / 89 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 10,724 shp / 8,000 Kw = 17.79 kts
Range 26,300nm at 10.00 kts
Bunker at max displacement = 2,608 tons

Complement:
525 - 683

Cost:
£1.108 million / $4.433 million

Distribution of weights at normal displacement:
Armament: 48 tons, 0.5 %
- Guns: 48 tons, 0.5 %
Armour: 12 tons, 0.1 %
- Armament: 12 tons, 0.1 %
Machinery: 358 tons, 3.4 %
Hull, fittings & equipment: 2,321 tons, 21.7 %
Fuel, ammunition & stores: 1,691 tons, 15.8 %
Miscellaneous weights: 6,252 tons, 58.5 %
- Hull below water: 4,000 tons
- Hull above water: 1,770 tons
- On freeboard deck: 400 tons
- Above deck: 82 tons

Fittings:
-5 t: 1918 Fire control (AD)
-25 t: L/R wireless (AD)
-20 t: Accommodation for 10 passengers (AD)
-32 t: Weight reserve/cargo/mail (AD)
-400 t: Oil handling equipment (FD)
-5,770 t: Fuel oil (AW/BW)
-

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,924 lbs / 7,223 Kg = 237.5 x 5.1 " / 130 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.50
Metacentric height 5.3 ft / 1.6 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.550 / 0.562
Length to Beam Ratio: 6.25 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 4.92 ft / 1.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 25.92 ft / 7.90 m, 21.00 ft / 6.40 m
- Forward deck: 10.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Aft deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 45.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Average freeboard: 15.39 ft / 4.69 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 71.8 %
- Above water (accommodation/working, high = better): 102.8 %
Waterplane Area: 18,780 Square feet or 1,745 Square metres
Displacement factor (Displacement / loading): 150 %
Structure weight / hull surface area: 82 lbs/sq ft or 403 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.83
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

10000 nm @ 15 knots

The Rock Doctor · August 02, 2022, 07:34:22 PM

Pulkownik Piotr Kaminski Class River Transport

The not-Parana and not-Paraguay rivers are important - nay, VITAL - transportation corridors in South Erika. While your typical ocean-going ships can't make the run up to not-Asuncion is, or will be, the not-Paraguay can still handle those with an eight foot draft. That allows for a fairly capable vessel to be built with that draft and the 100m capacity of regional drydocks in mind.

This riverine transport would be capable of carrying five hundred passengers and some cargo from Widoknagory (Montevideo) to Asuncion, or four times the passengers on a short day run. The ship itself is nothing fancy, although the design is fairly distinctly separated into operations, cargo, and passenger sections.

The ship is lightly armed for self-defence against land, water, or aircraft threats.

The class - at least two - will be built to civilian standards.

Pulkownik Piotr Kaminski, laid down 1923
Kapral Anton Koller, laid down 1923

Enter ship name, Enter country Enter ship type laid down 1923

Displacement:
2,436 t light; 2,492 t standard; 2,538 t normal; 2,575 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(325.59 ft / 318.24 ft) x 62.34 ft x (6.89 / 6.97 ft)
(99.24 m / 97.00 m) x 19.00 m x (2.10 / 2.13 m)

Armament:
2 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 250 per gun
Quick firing guns in deck mounts, 1923 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
Machine guns in deck mounts, 1923 Model
4 x Single mounts on sides, evenly spread
4 raised mounts
2 - 1.97" / 50.0 mm 45.0 cal guns - 3.86lbs / 1.75kg shells, 250 per gun
Anti-air guns in deck mounts, 1923 Model
2 x Single mounts on sides, aft deck forward
2 raised mounts
Weight of broadside 34 lbs / 15 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.79" / 20 mm -
3rd: 0.79" / 20 mm 0.39" / 10 mm -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,478 shp / 1,103 Kw = 12.21 kts
Range 1,200nm at 10.00 kts
Bunker at max displacement = 83 tons

Complement:
178 - 232

Cost:
£0.274 million / $1.095 million

Distribution of weights at normal displacement:
Armament: 7 tons, 0.3 %
- Guns: 7 tons, 0.3 %
Armour: 13 tons, 0.5 %
- Armament: 13 tons, 0.5 %
Machinery: 49 tons, 1.9 %
Hull, fittings & equipment: 1,032 tons, 40.7 %
Fuel, ammunition & stores: 102 tons, 4.0 %
Miscellaneous weights: 1,334 tons, 52.6 %
- Hull below water: 215 tons
- Hull above water: 300 tons
- On freeboard deck: 494 tons
- Above deck: 325 tons

Fittings:
-25 t: L/R wireless
-1,000 t: Accommodation for 500 passengers (AD/FD/AW)
-94 t: Weight reserve/deck cargo (FD)
-200 t: Cargo (BW)
-15 t: Diesel motors (BW)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,162 lbs / 6,878 Kg = 1,177.9 x 3.0 " / 75 mm shells or 5.0 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 3.8 ft / 1.1 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has rise aft of midbreak, low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.651
Length to Beam Ratio: 5.11 : 1
'Natural speed' for length: 17.84 kts
Power going to wave formation at top speed: 27 %
Trim (Max stability = 0, Max steadiness = 100): 78
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 4.92 ft / 1.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 13.78 ft / 4.20 m, 8.86 ft / 2.70 m
- Forward deck: 30.00 %, 8.86 ft / 2.70 m, 8.86 ft / 2.70 m
- Aft deck: 40.00 %, 16.73 ft / 5.10 m, 16.73 ft / 5.10 m
- Quarter deck: 10.00 %, 8.86 ft / 2.70 m, 8.86 ft / 2.70 m
- Average freeboard: 12.40 ft / 3.78 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 30.8 %
- Above water (accommodation/working, high = better): 217.2 %
Waterplane Area: 15,197 Square feet or 1,412 Square metres
Displacement factor (Displacement / loading): 173 %
Structure weight / hull surface area: 58 lbs/sq ft or 286 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.27
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

The Rock Doctor · December 19, 2022, 07:36:35 PM

Jacek Odrowaz Class Hospital Ship

The lack of a dedicated hospital ship was noticed during the recent Costa Rican war, and there's a good chance some Japanese and Aztec soldiers died as a result of that gap.

Sorry, dudes.

This new ship has a fairly "clean" design in the sense that the main working area is the weather deck, with medical staff housed above deck and patients below freeboard. Some additional boats, including larger launches, are housed aft in the embarkation area. Given the need to move a lot of wheeled stretchers around, it will be one of the few naval ships to contain elevators; a few of them, in fact.

Jacek Odrowaz, laid down 1924

Enter ship name, Enter country Enter ship type laid down 1924

Displacement:
7,308 t light; 7,465 t standard; 7,870 t normal; 8,194 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(405.30 ft / 393.70 ft) x 65.62 ft x (16.40 / 16.98 ft)
(123.53 m / 120.00 m) x 20.00 m x (5.00 / 5.17 m)

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 12,065 shp / 9,000 Kw = 18.90 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 729 tons

Complement:
417 - 543

Cost:
£0.963 million / $3.850 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 397 tons, 5.0 %
Hull, fittings & equipment: 2,277 tons, 28.9 %
Fuel, ammunition & stores: 563 tons, 7.1 %
Miscellaneous weights: 4,633 tons, 58.9 %
- Hull below water: 818 tons
- Hull above water: 2,400 tons
- On freeboard deck: 400 tons
- Above deck: 1,015 tons

Fittings:
-218 t: D-E machinery (BW)
-600 t: Stores (BW)
-2,400 t: Wards for 800 patients (AW)
-100 t: Boats and cranes (FD)
-300 t: Triage area, general hospital facilities, and five operating theatres (FD)
-800 t: Accommodation for 400 staff (AD)
-150 t: Staff and patient amenities (AD)
-25 t: L/R wireless (AD)
-40 t: Weight reserve (AD)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,569 lbs / 8,423 Kg = 171.9 x 6 " / 152 mm shells or 2.8 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 3.6 ft / 1.1 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 90 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.654
Length to Beam Ratio: 6.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 28.54 ft / 8.70 m, 23.62 ft / 7.20 m
- Forward deck: 30.00 %, 23.62 ft / 7.20 m, 23.62 ft / 7.20 m
- Aft deck: 25.00 %, 23.62 ft / 7.20 m, 23.62 ft / 7.20 m
- Quarter deck: 25.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Average freeboard: 22.05 ft / 6.72 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 61.7 %
- Above water (accommodation/working, high = better): 213.5 %
Waterplane Area: 19,790 Square feet or 1,839 Square metres
Displacement factor (Displacement / loading): 145 %
Structure weight / hull surface area: 78 lbs/sq ft or 383 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.37
- 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

The Rock Doctor · December 19, 2022, 07:40:55 PM

Lars Anderson Kruse Class Barrage Tender

It just isn't cool when bad people use airplanes to blow up your ships. And while the obvious answer is to just shoot down the airplanes, sometimes you want other options.

Like putting out balloons that the airplanes have to avoid flying into, because that isn't good for the airplanes and voids their warranties.

So you get something like this, which is a ship designed to deploy a modest balloon barrage in support of an anchorage or amphibious landing or what have you. There's a hydrogen facility below water. Above decks are two holds for deflated balloons, which I've assumed require about half the length/width/height of an inflated balloon, and a hold between those for buoys.

The general notion is that the buoy is moved by hoist/lift to an exterior working platform. Then the balloon is lifted out of the hold, inflated, and attached to the buoy. The completed contraption is then loaded onto one of the two smaller buoy tenders (the small craft shown aft) and taken out to deploy while the mother ship stays safe at anchor behind her torpedo nets. The buoy tender sets the buoy in the water, unreel its anchor so it stays put, then adjust the winch to let the balloon float at the desired height.

At the moment, only a single unit is planned, but favorable experimentation might result in another one day.

Lars Anderson Kruse, laid down 1924

Barrage Tender, laid down 1924

Displacement:
5,601 t light; 5,752 t standard; 6,152 t normal; 6,471 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(448.72 ft / 438.65 ft) x 62.34 ft x (13.12 / 13.68 ft)
(136.77 m / 133.70 m) x 19.00 m x (4.00 / 4.17 m)

Armament:
2 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
Quick firing guns in deck and hoist mount, 1924 Model
1 x 2-gun mount on centreline, aft deck aft
2 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
Anti-air guns in deck mounts, 1924 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
Machine guns in deck mounts, 1924 Model
4 x Single mounts on sides amidships
4 raised mounts
Weight of broadside 197 lbs / 89 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 13,405 shp / 10,000 Kw = 20.48 kts
Range 9,000nm at 10.00 kts
Bunker at max displacement = 718 tons

Complement:
346 - 451

Cost:
£0.847 million / $3.386 million

Distribution of weights at normal displacement:
Armament: 48 tons, 0.8 %
Armour: 20 tons, 0.3 %
- Armament: 20 tons, 0.3 %
Machinery: 442 tons, 7.2 %
Hull, fittings & equipment: 2,879 tons, 46.8 %
Fuel, ammunition & stores: 550 tons, 8.9 %
Miscellaneous weights: 2,213 tons, 36.0 %
- Hull below water: 1,243 tons
- Hull above water: 570 tons
- On freeboard deck: 200 tons
- Above deck: 200 tons

Fittings:
-500 t: Ballast (BW)
-500 t: Hydrogen production plant and stores (BW)
-243 t: That sweet turbo-electic drive (BW)
-320 t: Balloon storage (AW)
-16 t: Balloons themselves (AW)
-100 t: 16 buoys, storage, workbench, and lift (AW)
-134 t: Anti-torpedo nets (AW)
-80 t: 2 x 20 t buoy tenders and davits (FD)
-50 t: Two big cranes (FD)
-70 t: Weight reserve (FD)
-120 t: Inflation/work platform (AD)
-25 t: L/R wireless (AD)
-25 t: Meteorology office (AD)
-5 t: Model 1918 fire control (AD)
-25 t: More Weight reserve (AD)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
20,174 lbs / 9,151 Kg = 301.0 x 5.1 " / 130 mm shells or 2.9 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 3.8 ft / 1.2 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 90 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.600 / 0.605
Length to Beam Ratio: 7.04 : 1
'Natural speed' for length: 20.94 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 4.92 ft / 1.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 10.00 %, 29.20 ft / 8.90 m, 26.25 ft / 8.00 m
- Forward deck: 30.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Aft deck: 35.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Quarter deck: 25.00 %, 18.37 ft / 5.60 m, 18.37 ft / 5.60 m
- Average freeboard: 24.40 ft / 7.44 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 59.0 %
- Above water (accommodation/working, high = better): 289.0 %
Waterplane Area: 19,999 Square feet or 1,858 Square metres
Displacement factor (Displacement / loading): 188 %
Structure weight / hull surface area: 91 lbs/sq ft or 446 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.04
- Longitudinal: 3.62
- Overall: 1.18
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

Bonus Content: Buoy Tender Specs

Enter ship name, Enter country Enter ship type laid down 1924

Displacement:
20 t light; 21 t standard; 22 t normal; 22 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(52.63 ft / 49.21 ft) x 13.12 ft x (1.80 / 1.82 ft)
(16.04 m / 15.00 m) x 4.00 m x (0.55 / 0.56 m)

Armament:
2 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 4,000 per gun
Breech loading guns in deck mounts, 1924 Model
2 x Single mounts on sides, forward deck centre
Weight of broadside 0 lbs / 0 kg

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 67 shp / 50 Kw = 10.05 kts
Range 200nm at 8.00 kts
Bunker at max displacement = 1 tons

Complement:
4 - 6

Cost:
£0.003 million / $0.013 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.5 %
Machinery: 2 tons, 10.2 %
Hull, fittings & equipment: 11 tons, 51.2 %
Fuel, ammunition & stores: 1 tons, 5.7 %
Miscellaneous weights: 7 tons, 32.3 %
- Hull below water: 1 tons
- Above deck: 6 tons

Fittings:
-1 t: Smallest diesel-electric drive in the Union (BW)
-6 t: Crane and cradle for one balloon buoy (AD to reflect topweight/weathervaning of balloon)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
139 lbs / 63 Kg = 1,349.8 x 0.6 " / 15 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 0.3 ft / 0.1 m
Roll period: 9.4 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.43

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.651
Length to Beam Ratio: 3.75 : 1
'Natural speed' for length: 7.02 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 48
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 1.97 ft / 0.60 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 8.20 ft / 2.50 m, 6.23 ft / 1.90 m
- Forward deck: 30.00 %, 6.23 ft / 1.90 m, 6.23 ft / 1.90 m
- Aft deck: 35.00 %, 6.23 ft / 1.90 m, 6.23 ft / 1.90 m
- Quarter deck: 15.00 %, 6.23 ft / 1.90 m, 6.23 ft / 1.90 m
- Average freeboard: 6.39 ft / 1.95 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 43.5 %
- Above water (accommodation/working, high = better): 146.9 %
Waterplane Area: 495 Square feet or 46 Square metres
Displacement factor (Displacement / loading): 183 %
Structure weight / hull surface area: 13 lbs/sq ft or 61 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.71
- Longitudinal: 22.41
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

The Rock Doctor · January 29, 2023, 06:18:29 PM

Goscinny Class Depot Ship

Lesson learned from the World Cruise: Get some decent depot ships fer cryin' out loud. With some legs and some speed and enough guns to make a decent showing of defence.

So this big bad boy can basically support a modern capital ship, light cruiser, and four torpedo-boats, or some other combo of vessels, for a long, long time.

My H2/1924 report might be using a slightly different light displacement for the lead unit, which I'll fix if necessary for 1/25.

Goscinny, laid down 1924
Niesamowity, laid down 1925

Home Depot, laid down 1924

Displacement:
8,972 t light; 9,232 t standard; 10,118 t normal; 10,827 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(390.76 ft / 380.58 ft) x 62.34 ft x (22.97 / 24.33 ft)
(119.10 m / 116.00 m) x 19.00 m x (7.00 / 7.42 m)

Armament:
4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
Quick firing guns in deck and hoist mounts, 1924 Model
2 x 2-gun mounts on centreline, aft deck aft
1 raised mount aft - superfiring
4 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
Anti-air guns in deck mounts, 1924 Model
4 x Single mounts on sides amidships
4 raised mounts
12 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 4,000 per gun
Machine guns in deck mounts, 1924 Model
4 x Twin mounts on sides, evenly spread
4 raised mounts
4 x Single mounts on sides amidships
Weight of broadside 395 lbs / 179 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm -
3rd: 0.59" / 15 mm - -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 12,064 shp / 9,000 Kw = 18.23 kts
Range 16,400nm at 10.00 kts
Bunker at max displacement = 1,595 tons

Complement:
503 - 655

Cost:
£1.241 million / $4.965 million

Distribution of weights at normal displacement:
Armament: 96 tons, 0.9 %
Armour: 47 tons, 0.5 %
- Armament: 47 tons, 0.5 %
Machinery: 397 tons, 3.9 %
Hull, fittings & equipment: 2,359 tons, 23.3 %
Fuel, ammunition & stores: 1,146 tons, 11.3 %
Miscellaneous weights: 6,073 tons, 60.0 %
- Hull below water: 2,219 tons
- Hull above water: 2,116 tons
- On freeboard deck: 1,138 tons
- Above deck: 600 tons

Fittings:
-219 t: T-E machinery (BW)
-116 t: Torpedo nets (AW)
-100 t: Cargo handling gear (FD)
-25 t: L/R wireless (AD)
-113 t: Weight reserve (mostly AD)
-5,500 t: Supply/support for 55,000 t of warships (2/2/1/0.5 from bottom to top)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,185 lbs / 8,249 Kg = 271.3 x 5.1 " / 130 mm shells or 2.6 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 3.4 ft / 1.0 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, rise aft of midbreak, low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.657
Length to Beam Ratio: 6.11 : 1
'Natural speed' for length: 19.51 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 4.92 ft / 1.50 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 29.86 ft / 9.10 m, 24.93 ft / 7.60 m
- Forward deck: 30.00 %, 17.06 ft / 5.20 m, 17.06 ft / 5.20 m
- Aft deck: 35.00 %, 24.93 ft / 7.60 m, 24.93 ft / 7.60 m
- Quarter deck: 15.00 %, 17.06 ft / 5.20 m, 17.06 ft / 5.20 m
- Average freeboard: 21.78 ft / 6.64 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 63.4 %
- Above water (accommodation/working, high = better): 146.6 %
Waterplane Area: 18,174 Square feet or 1,688 Square metres
Displacement factor (Displacement / loading): 140 %
Structure weight / hull surface area: 82 lbs/sq ft or 401 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 2.92
- 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

The Rock Doctor · January 29, 2023, 06:22:21 PM

Detektyw Class Riverine Depot Ship

Union riverine forces in [Uruguay] are supported by a good-sized depot ship, but their comrades in Africa lack such capabilities. With talk of deploying small MTBs into the Orimiri Delta as part of anti-bandit operations, perhaps the time has come for a small, shallow draft support vessel.

This particular design incorporates a lot of ideas from the recent batch of riverine seaplane tenders, including the provision of a single aircraft right aft for scouting and recce purposes. Otherwise, it's basically a floating barracks for the crews of four small torpedo-craft and a platoon or so of naval infantry or police.

The ship is not really intended as a combat unit, but the shallow draft and single 50mm gun does allow her to operate in fairly shallow stretches of the river system in a direct-fire support capacity if that need arises.

Detektyw, laid down 1924
Sledczy, laid down 1926

Enter ship name, Enter country Enter ship type laid down 1924

Displacement:
299 t light; 307 t standard; 316 t normal; 324 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(163.48 ft / 157.48 ft) x 26.25 ft x (3.94 / 4.02 ft)
(49.83 m / 48.00 m) x 8.00 m x (1.20 / 1.22 m)

Armament:
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
Machine guns in deck mounts, 1924 Model
4 x Single mounts on centreline ends, evenly spread
4 raised mounts
1 - 1.97" / 50.0 mm 45.0 cal gun - 3.85lbs / 1.75kg shells, 250 per gun
Quick firing gun in deck mount, 1924 Model
1 x Single mount on centreline, forward deck forward
1 raised mount
Weight of broadside 4 lbs / 2 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm - -
2nd: 0.79" / 20 mm 0.79" / 20 mm -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 402 shp / 300 Kw = 11.86 kts
Range 1,000nm at 10.00 kts
Bunker at max displacement = 17 tons

Complement:
36 - 48

Cost:
£0.039 million / $0.157 million

Distribution of weights at normal displacement:
Armament: 1 tons, 0.4 %
Armour: 8 tons, 2.6 %
- Armament: 8 tons, 2.6 %
Machinery: 13 tons, 4.2 %
Hull, fittings & equipment: 99 tons, 31.4 %
Fuel, ammunition & stores: 17 tons, 5.5 %
Miscellaneous weights: 177 tons, 56.0 %
- Hull below water: 12 tons
- Hull above water: 15 tons
- On freeboard deck: 145 tons
- Above deck: 5 tons

Fittings:
-4 t: Diesel engines (BW)
-8 t: Stores for 80 t of small craft (BW)
-10 t: Small craft workshop (AW)
-5 t: Brig (AW)
-120 t: Accommodation for 24 MTB crew and 36 naval infantry/police (FD)
-20 t: Facilities for one unarmed floatplane (FD)
-5 t: Weight reserve (FD)
-5 t: Working space (AD)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,916 lbs / 869 Kg = 18,603.6 x 0.6 " / 15 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 1.1 ft / 0.3 m
Roll period: 10.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- 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,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.680 / 0.682
Length to Beam Ratio: 6.00 : 1
'Natural speed' for length: 12.55 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.98 ft / 0.30 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 13.78 ft / 4.20 m, 13.78 ft / 4.20 m
- Forward deck: 25.00 %, 13.78 ft / 4.20 m, 13.78 ft / 4.20 m
- Aft deck: 35.00 %, 5.91 ft / 1.80 m, 5.91 ft / 1.80 m
- Quarter deck: 15.00 %, 5.91 ft / 1.80 m, 5.91 ft / 1.80 m
- Average freeboard: 9.84 ft / 3.00 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 26.2 %
- Above water (accommodation/working, high = better): 158.2 %
Waterplane Area: 3,254 Square feet or 302 Square metres
Displacement factor (Displacement / loading): 147 %
Structure weight / hull surface area: 21 lbs/sq ft or 103 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.65
- Longitudinal: 2.42
- Overall: 0.75
Caution: Hull subject to strain in open-sea
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

The Rock Doctor · January 29, 2023, 06:28:31 PM

Oresund Class Troop Ferry

Building on earlier ideas of a fast ferry for Baltic transport of troops and the river transport down in South America, a fast ferry for Caribbean service.

Notionally, with "commuter seating" at 4 troopers per tonne, the ferry can transport 2,000 men, plus 500 t of cargo.

At a cruise speed (50% power) of 18 knots, the ferry could make a one-way run from Cartagena (not a PORT) to Colon in 16 hours, or from Barranquilla (a PORT) to Colon in 22 hours. Short hops would also enable troop transfer from Puerto Rico to either Hispaniola or the wee islands to the east

Oresund, laid down 1924
Ciesnina Wiatrow, laid down 1925

Enter ship name, Enter country Enter ship type laid down 1924

Displacement:
   2,384 t light; 2,452 t standard; 2,655 t normal; 2,818 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (387.30 ft / 374.02 ft) x 44.29 ft x (12.47 / 13.01 ft)
   (118.05 m / 114.00 m) x 13.50 m x (3.80 / 3.96 m)

Armament:
1 - 3.94" / 100.0 mm 45.0 cal gun - 30.77lbs / 13.96kg shells, 250 per gun
     Quick firing gun in deck mount, 1924 Model
     1 x Single mount on sides, forward deck aft
      1 raised mount
2 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air guns in deck mounts, 1924 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1924 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
Weight of broadside 93 lbs / 42 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.79" / 20 mm        -
   2nd:   0.79" / 20 mm   0.12" / 3 mm        -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 9,651 shp / 7,200 Kw = 21.79 kts
   Range 2,000nm at 18.00 kts
   Bunker at max displacement = 366 tons

Complement:
   184 - 240

Cost:
   £0.410 million / $1.642 million

Distribution of weights at normal displacement:
   Armament: 18 tons, 0.7 %
   Armour: 6 tons, 0.2 %
     - Armament: 6 tons, 0.2 %
   Machinery: 318 tons, 12.0 %
   Hull, fittings & equipment: 1,029 tons, 38.8 %
   Fuel, ammunition & stores: 271 tons, 10.2 %
   Miscellaneous weights: 1,013 tons, 38.1 %
     - Hull below water: 240 tons
     - Hull above water: 240 tons
     - On freeboard deck: 250 tons
     - Above deck: 283 tons

Fittings:
-500 t: Commuter seating for 2,000 troops (FD/AD)
-500 t: Cargo (Mostly BW/AW)
-2 t: 1918 fire control (AD)
-11 t: Weight reserve (AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,630 lbs / 3,008 Kg = 217.3 x 3.9 " / 100 mm shells or 1.8 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 13.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.06
   Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle, rise aft of midbreak, low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.458
   Length to Beam Ratio: 8.44 : 1
   'Natural speed' for length: 19.34 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 4.92 ft / 1.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 22.97 ft / 7.00 m, 19.03 ft / 5.80 m
     - Forward deck:   20.00 %, 11.15 ft / 3.40 m, 11.15 ft / 3.40 m
     - Aft deck:   50.00 %, 19.03 ft / 5.80 m, 19.03 ft / 5.80 m
     - Quarter deck:   10.00 %, 11.15 ft / 3.40 m, 11.15 ft / 3.40 m
     - Average freeboard:      16.98 ft / 5.18 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 61.7 %
      - Above water (accommodation/working, high = better): 183.5 %
   Waterplane Area: 10,567 Square feet or 982 Square metres
   Displacement factor (Displacement / loading): 156 %
   Structure weight / hull surface area: 57 lbs/sq ft or 281 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.43
      - 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