Auxiliaries

[The Rock Doctor]

Nokoue Class Oiler

The 1926 oiler is a mild upgrade of the preceding Vanem type.  A little faster, a few more machine guns, a few tonnes more oil.

Nokoue, laid down 1926
Sniardwy, laid down 1927

Enter ship name, Enter country Enter ship type laid down 1926

Displacement:
   9,035 t light; 9,278 t standard; 10,683 t normal; 11,807 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 / 27.36 ft)
   (127.89 m / 125.00 m) x 20.00 m  x (7.70 / 8.34 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, 1926 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, 1926 Model
     1 x Single mount on centreline, forward deck forward
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1926 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 198 lbs / 90 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   0.59" / 15 mm            -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 12,065 shp / 9,000 Kw = 18.35 kts
   Range 26,300nm at 10.00 kts
   Bunker at max displacement = 2,529 tons

Complement:
   525 - 683

Cost:
   £1.335 million / $5.341 million

Distribution of weights at normal displacement:
   Armament: 49 tons, 0.5 %
   Armour: 21 tons, 0.2 %
      - Armament: 21 tons, 0.2 %
   Machinery: 386 tons, 3.6 %
   Hull, fittings & equipment: 2,302 tons, 21.5 %
   Fuel, ammunition & stores: 1,648 tons, 15.4 %
   Miscellaneous weights: 6,277 tons, 58.8 %
      - Hull below water: 4,000 tons
      - Hull above water: 1,790 tons
      - On freeboard deck: 400 tons
      - Above deck: 87 tons

Fittings:
-5 t:  1918 Fire control (AD)
-25 t:  L/R wireless (AD)
-20 t:  Accommodation for 10 passengers (AD)
-37 t:  Weight reserve/cargo/mail (AD)
-400 t:  Oil handling equipment (FD)
-5,790 t:  Fuel oil (AW/BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,276 lbs / 6,929 Kg = 227.9 x 5.1 " / 130 mm shells or 2.3 torpedoes
   Stability (Unstable if below 1.00): 1.49
   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 / 0.561
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 20.25 kts
   Power going to wave formation at top speed: 45 %
   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:   60.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Quarter deck:   15.00 %,  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): 72.8 %
      - Above water (accommodation/working, high = better): 97.1 %
   Waterplane Area: 18,780 Square feet or 1,745 Square metres
   Displacement factor (Displacement / loading): 148 %
   Structure weight / hull surface area: 82 lbs/sq ft or 400 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.82
      - Overall: 1.00
   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, can fire her guns in the heaviest weather

[The Rock Doctor]

Okon Class Submarine Rescue Ship

Recognizing that it may be "too soon" from an out-of-character perspective, given the recent accident in the Atlantic, there is nonetheless an in-character utility in acquiring a dedicated submarine rescue ship.

This class would embark divers, diving bells, decompression chambers, extra cranes and other stuff associated with getting people safely out of a disabled submarine.  There would also be some medical facilities to observe and treat survivors or the ship's own diving complement.  It would not be capable of actually retrieving a submarine, though, a heavier crane ship would be needed for that.

When not dealing with accidents or training for accidents, the class can also be used to work around wrecks (investigating/charting/demolishing), surveying, torpedo recovery, and that sort of thing.

Armament is very modest and defensive in nature.  Speed/range is primarily to allow a rapid-ish transit from home port to an accident site.  The build would be to civilian specs.

From a numbers perspective, most Union submarines are in European or Caribbean waters so a unit in each would make some sense.  A third unit might be good to have some back-up coverage.

Okon, laid down 1927
Belona, laid down 1928
Szczupak, laid down 1928

Submarine rescue ship, laid down 1927

Displacement:
   1,129 t light; 1,166 t standard; 1,355 t normal; 1,507 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (252.64 ft / 242.78 ft) x 36.09 ft x (9.84 / 10.71 ft)
   (77.01 m / 74.00 m) x 11.00 m  x (3.00 / 3.26 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, 1927 Model
     1 x Single mount on centreline, forward deck forward
      1 raised mount
      1 - 3.94" / 100.0 mm 45.0 cal gun - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air gun in deck mount, 1927 Model
     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, 1927 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 62 lbs / 28 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm   0.59" / 15 mm            -
   2nd:   0.79" / 20 mm   0.59" / 15 mm            -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 5,899 shp / 4,400 Kw = 20.09 kts
   Range 3,000nm at 16.90 kts
   Bunker at max displacement = 341 tons

Complement:
   111 - 145

Cost:
   £0.250 million / $1.000 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 0.9 %
   Armour: 11 tons, 0.8 %
      - Armament: 11 tons, 0.8 %
   Machinery: 186 tons, 13.7 %
   Hull, fittings & equipment: 462 tons, 34.1 %
   Fuel, ammunition & stores: 226 tons, 16.7 %
   Miscellaneous weights: 458 tons, 33.8 %
      - Hull below water: 127 tons
      - Hull above water: 100 tons
      - On freeboard deck: 194 tons
      - Above deck: 37 tons

Fittings:
-25 t:  L/R wireless (AD)
-10 t:  Lighting/nightfighting doodads (AD)
-2 t:  1918 fire control (AD)
-14 t:  Weight reserve (FD)
-180 t:  Extra cranes, operations space, and other mission-themed stuff (FD)
-30 t:  Cargo hold (Diving bells, etc) (AW)
-70 t:  Decompression chamber, medical facilities (AW)
-102 t:  Diesel-electric machinery (BW)
-25 t:  Sonar and enhanced hydrophone package (BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,146 lbs / 1,427 Kg = 103.1 x 3.9 " / 100 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 12.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 1.59

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.562
   Length to Beam Ratio: 6.73 : 1
   'Natural speed' for length: 15.58 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 44
   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 %,  18.70 ft / 5.70 m,  13.78 ft / 4.20 m
      - Forward deck:   30.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Aft deck:   35.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Quarter deck:   15.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Average freeboard:      14.17 ft / 4.32 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 66.5 %
      - Above water (accommodation/working, high = better): 144.6 %
   Waterplane Area: 6,115 Square feet or 568 Square metres
   Displacement factor (Displacement / loading): 156 %
   Structure weight / hull surface area: 46 lbs/sq ft or 223 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.87
      - Longitudinal: 3.50
      - 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

D-E engines add 90% to range, so:

22,800 @ 10 kts
8,000 @ 15 kts
5,700 @ 16.92 kts (half power)
3,400 @ 20 kts

[The Rock Doctor]

Zyczliwy Class Depot Ship

Another class of really huge depot ships to support capital ship deployments.  It is pretty much just a Goscinny class with mild adjustments.

Zyczliwy, laid down 1929
Pogodny, laid down 1930

Enter ship name, Enter country Enter ship type laid down 1929

Displacement:
   8,937 t light; 9,197 t standard; 10,118 t normal; 10,856 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 / 24.39 ft)
   (119.10 m / 116.00 m) x 19.00 m  x (7.00 / 7.43 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, 1929 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, 1929 Model
     4 x Single mounts on sides, evenly spread
      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, 1929 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, 13,405 shp / 10,000 Kw = 18.73 kts
   Range 18,000nm at 10.00 kts
   Bunker at max displacement = 1,659 tons

Complement:
   503 - 655

Cost:
   £1.610 million / $6.438 million

Distribution of weights at normal displacement:
   Armament: 96 tons, 0.9 %
   Armour: 47 tons, 0.5 %
      - Armament: 47 tons, 0.5 %
   Machinery: 412 tons, 4.1 %
   Hull, fittings & equipment: 2,361 tons, 23.3 %
   Fuel, ammunition & stores: 1,181 tons, 11.7 %
   Miscellaneous weights: 6,021 tons, 59.5 %
      - Hull below water: 2,227 tons
      - Hull above water: 2,116 tons
      - On freeboard deck: 1,078 tons
      - Above deck: 600 tons

Fittings:
-216 t:  T-E machinery (BW)
-116 t:  Torpedo nets (AW)
-100 t:  Cargo handling gear (FD)
-25 t:  L/R wireless (AD)
-64 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):
     18,090 lbs / 8,205 Kg = 269.9 x 5.1 " / 130 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 3.5 ft / 1.1 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: 51 %
   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): 63.9 %
      - Above water (accommodation/working, high = better): 146.6 %
   Waterplane Area: 18,174 Square feet or 1,688 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 82 lbs/sq ft or 402 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

116 t AW for nets
216 t BW for machinery

[The Rock Doctor]

Spoldzielnia Class Riverine Depot Ship

Notionally, this supports a patrol and policing presence in either the upper reaches of the Orimiri/Niger river and the extensive riverine system of South America.  Some combination of motor torpedo-boats, small river gunboats, patrol craft, or even landing craft with troops could base themselves wherever the depot ship is hanging out.  There's some basic resupply capability, accommodations, and some basic admin/operational space set aside.

The shallow draft precludes any kind of protection, and the ship shouldn't be on the frontlines anyway.  It's well armed for defence against air attack, and the AA guns and machine guns could also be used for direct fire against waterborne or terrestrial threats too.

This would be built to mercantile specs, probably using the local drydocks since they won't quite fit on my sealift ships.

A non-mercantile version, at 0.75 hull strength, would have another 100 t or so available for stuff on the same hull.

Spolhzielnia, laid down 1931
Serdeczny, laid down 1931
Lagodny, laid down 1931
Cichy, laid down 1931

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

Displacement:
   799 t light; 831 t standard; 851 t normal; 868 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (254.05 ft / 246.06 ft) x 49.21 ft x (3.28 / 3.34 ft)
   (77.43 m / 75.00 m) x 15.00 m  x (1.00 / 1.02 m)

Armament:
      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, 1931 Model
     2 x Twin 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, 1931 Model
     4 x Single mounts on sides, forward evenly spread
      4 raised mounts
      Weight of broadside 17 lbs / 8 kg

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

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 536 shp / 400 Kw = 10.31 kts
   Range 1,000nm at 10.00 kts
   Bunker at max displacement = 37 tons

Complement:
   78 - 102

Cost:
   £0.138 million / $0.552 million

Distribution of weights at normal displacement:
   Armament: 5 tons, 0.5%
      - Guns: 5 tons, 0.5%
   Armour: 5 tons, 0.6%
      - Armament: 5 tons, 0.6%
   Machinery: 16 tons, 1.9%
   Hull, fittings & equipment: 453 tons, 53.2%
   Fuel, ammunition & stores: 53 tons, 6.2%
   Miscellaneous weights: 320 tons, 37.6%
      - Hull below water: 69 tons
      - Hull above water: 60 tons
      - On freeboard deck: 120 tons
      - Above deck: 71 tons

Fittings:
-25 t:  L/R wireless (AD)
-25 t:  Command and operations facilities (AD)
-10 t:  Sickbay (AD)
-10 t:  Crew amenities (AD)
-1 t:  Fire control, such as it is (AD)
-120 t:  Accommodation for sixty (6 for 20 t MTB, 12 for 40 t MTB or HPB, 3 for landing craft, or 30 man naval infantry platoon) (FD)
-60 t:  Machine shop and stores/dry cargo/ammunition (AW)
-60 t:  Fuel for small craft (BW)
-9 t:  Diesel-electric machinery (BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,153 lbs / 3,244 Kg = 1,875.4 x 2.0 " / 50 mm shells or 4.0 torpedoes
   Stability (Unstable if below 1.00): 1.41
   Metacentric height 3.2 ft / 1.0 m
   Roll period: 11.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
   Hull has rise forward of midbreak, raised quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.750 / 0.751
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 15.69 kts
   Power going to wave formation at top speed: 22 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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%,  17.39 ft / 5.30 m,  13.45 ft / 4.10 m
      - Forward deck:   15.00%,  13.45 ft / 4.10 m,  13.45 ft / 4.10 m
      - Aft deck:   25.00%,  5.58 ft / 1.70 m,  5.58 ft / 1.70 m
      - Quarter deck:   50.00%,  13.45 ft / 4.10 m,  13.45 ft / 4.10 m
      - Average freeboard:      11.64 ft / 3.55 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 27.5%
      - Above water (accommodation/working, high = better): 211.3%
   Waterplane Area: 10,142 Square feet or 942 Square metres
   Displacement factor (Displacement / loading): 230%
   Structure weight / hull surface area: 39 lbs/sq ft or 190 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.67
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[The Rock Doctor]

Nehalennia Class Salvage Tug

The Vellamo class is pretty good for its job, and this just tweaks the formula.  Slimmer lines, deeper draft and higher freeboard lead to improved seakeeping qualities.  There's a bit of space to take on survivors or specialists and there's an AA gun.  The end armor protects the bow when pushing ships around.  There's a token amount of ASW hardware, enough that it could annoy a submarine for a short time if this were necessary and the ship were not in the process of towing something - fundamentally, this could function as a convoy escort.

The minimal armament and armor (1.97% of normal tonnage) means the ship can be costed as a merchantile build.

A run of four to six ships will probably happen.  Deployment will probably focus on those parts of the Atlantic with the worst weather conditions, given the improved seakeeping/freeboard aspect of the ship.

Nehalennia, laid down 1931
Sunna, laid down 1931
Vihansa, laid down 1932
Hludana, laid down 1932

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

Displacement:
   1,001 t light; 1,039 t standard; 1,165 t normal; 1,266 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (201.77 ft / 196.85 ft) x 32.81 ft x (11.48 / 12.27 ft)
   (61.50 m / 60.00 m) x 10.00 m  x (3.50 / 3.74 m)

Armament:
      1 - 3.94" / 100 mm 45.0 cal gun - 30.77lbs / 13.96kg shells, 400 per gun
     Dual purpose gun in deck mount, 1931 Model
     1 x Single mount on centreline, forward deck centre
      2 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
     Anti-air guns in deck mount, 1931 Model
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
      4 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1931 Model
     2 x Twin mounts on sides amidships
      2 raised mounts
      Weight of broadside 40 lbs / 18 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Ends:   0.98" / 25 mm     15.75 ft / 4.80 m   11.81 ft / 3.60 m
     181.10 ft / 55.20 m Unarmoured ends

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

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 4,022 shp / 3,000 Kw = 18.24 kts
   Range 9,000nm at 10.00 kts
   Bunker at max displacement = 227 tons

Complement:
   99 - 129

Cost:
   £0.236 million / $0.944 million

Distribution of weights at normal displacement:
   Armament: 8 tons, 0.7%
      - Guns: 8 tons, 0.7%
   Armour: 11 tons, 0.9%
      - Belts: 7 tons, 0.6%
      - Armament: 4 tons, 0.4%
   Machinery: 120 tons, 10.3%
   Hull, fittings & equipment: 352 tons, 30.2%
   Fuel, ammunition & stores: 164 tons, 14.1%
   Miscellaneous weights: 510 tons, 43.8%
      - Hull below water: 81 tons
      - Hull above water: 100 tons
      - On freeboard deck: 300 tons
      - Above deck: 29 tons

Fittings:
-25 t:  L/R wireless (AD)
-1 t:  Fire control (AD)
-2 t:  Searchlights (AD)
-250 t:  Towing and salvage stuff, including two water monitors (FD)
-30 t + 30 t:  Emergency accommodations (FD/AW)
-4 t:  Depth charges (FD)
-50 t:  Pumps and salvage stuff (AW)
-15 t:  Enhanced hydrophone package (BW)
-66 t:  D-E machinery (BW)
1t + 16 + 20 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,879 lbs / 1,306 Kg = 94.4 x 3.9 " / 100 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 1.82

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 14.03 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 33
   Bow angle (Positive = bow angles forward): 0.00 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%,  21.65 ft / 6.60 m,  17.72 ft / 5.40 m
      - Forward deck:   30.00%,  17.72 ft / 5.40 m,  17.72 ft / 5.40 m
      - Aft deck:   30.00%,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Quarter deck:   20.00%,  9.84 ft / 3.00 m,  12.80 ft / 3.90 m
      - Average freeboard:      14.39 ft / 4.39 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 54.5%
      - Above water (accommodation/working, high = better): 119.5%
   Waterplane Area: 4,507 Square feet or 419 Square metres
   Displacement factor (Displacement / loading): 149%
   Structure weight / hull surface area: 41 lbs/sq ft or 202 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.82
      - Longitudinal: 6.10
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[The Rock Doctor]

Vorstjarv Class Oiler

A big and relatively fast oiler for high-seas, high-ish speed sorties.


Vorstjarv, laid down 1931
Saimaa, laid down 1932
Bosumtwi, laid down 1933
Yainagua, laid down 1934

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

Displacement:
   14,962 t light; 15,390 t standard; 17,180 t normal; 18,612 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (492.01 ft / 482.28 ft) x 72.18 ft x (26.57 / 28.45 ft)
   (149.96 m / 147.00 m) x 22.00 m  x (8.10 / 8.67 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     2 x 2-gun mounts on centreline, aft deck aft
      1 raised mount aft - superfiring
      6 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1931 Model
     2 x Twin mounts on sides, aft deck forward
      2 raised mounts
     1 x Twin mount on centreline, forward deck forward
      1 raised mount
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1931 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 296 lbs / 134 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   0.59" / 15 mm            -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 38,874 shp / 29,000 Kw = 23.13 kts
   Range 10,000nm at 15.00 kts
   Bunker at max displacement = 3,223 tons

Complement:
   749 - 975

Cost:
   £3.117 million / $12.470 million

Distribution of weights at normal displacement:
   Armament: 85 tons, 0.5%
      - Guns: 85 tons, 0.5%
   Armour: 34 tons, 0.2%
      - Armament: 34 tons, 0.2%
   Machinery: 1,162 tons, 6.8%
   Hull, fittings & equipment: 3,546 tons, 20.6%
   Fuel, ammunition & stores: 2,218 tons, 12.9%
   Miscellaneous weights: 10,135 tons, 59.0%
      - Hull below water: 6,400 tons
      - Hull above water: 3,250 tons
      - On freeboard deck: 400 tons
      - Above deck: 85 tons

Fittings:
-9 t:  1924 fire control (AD)
-25 t:  L/R wireless (AD)
-30 t:  Accommodation for 15 passengers (AD)
-21 t:  Weight reserve (AD)
-400 t:  Oil handling equipment (FD)
-50 t:  Dry stores/deck cargo (AW)
-9,600 t:  Fuel oil (BW/AW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,962 lbs / 9,508 Kg = 312.7 x 5.1 " / 130 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.53
   Metacentric height 6.3 ft / 1.9 m
   Roll period: 12.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.658
   Length to Beam Ratio: 6.68 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   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%,  27.23 ft / 8.30 m,  22.31 ft / 6.80 m
      - Forward deck:   10.00%,  22.31 ft / 6.80 m,  22.31 ft / 6.80 m
      - Aft deck:   60.00%,  14.44 ft / 4.40 m,  14.44 ft / 4.40 m
      - Quarter deck:   15.00%,  14.44 ft / 4.40 m,  14.44 ft / 4.40 m
      - Average freeboard:      16.70 ft / 5.09 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 85.3%
      - Above water (accommodation/working, high = better): 105.5%
   Waterplane Area: 26,667 Square feet or 2,477 Square metres
   Displacement factor (Displacement / loading): 135%
   Structure weight / hull surface area: 92 lbs/sq ft or 451 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.42
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Good seaboat, rides out heavy weather easily

6,200 nm @ 18 kts
4,600 nm @ 20 kts
3,000 nm @ 23 kts
These don't include geared drive boni

[The Rock Doctor]

Alexander von Humboldt Class Repair Ship

A repair ship based on previous depot ship classes.

Not really sure how to quantify how much repairing it can do, but it's a capability nonetheless.

Alexander von Humboldt, laid down 1931
Ssiquoya, laid down 1932

Repair ship, laid down 1931

Displacement:
   8,995 t light; 9,278 t standard; 10,069 t normal; 10,702 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (489.03 ft / 472.44 ft) x 68.90 ft x (19.69 / 20.66 ft)
   (149.06 m / 144.00 m) x 21.00 m  x (6.00 / 6.30 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     2 x Twin mounts on centreline, aft deck aft
      1 raised mount aft - superfiring
      8 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1931 Model
     2 x Twin mounts on sides, aft deck aft
      2 raised mounts
     2 x Twin mounts on sides, forward deck forward
      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, 1931 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 305 lbs / 138 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:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Diesel Internal combustion generators,  plus diesel motors,
   Electric motors, 2 shafts, 11,395 shp / 8,500 Kw = 18.40 kts
   Range 6,000nm at 15.00 kts
   Bunker at max displacement = 1,424 tons

Complement:
   502 - 653

Cost:
   £1.707 million / $6.827 million

Distribution of weights at normal displacement:
   Armament: 71 tons, 0.7%
      - Guns: 71 tons, 0.7%
   Armour: 25 tons, 0.2%
      - Armament: 25 tons, 0.2%
   Machinery: 341 tons, 3.4%
   Hull, fittings & equipment: 2,870 tons, 28.5%
   Fuel, ammunition & stores: 1,074 tons, 10.7%
   Miscellaneous weights: 5,688 tons, 56.5%
      - Hull below water: 1,788 tons
      - Hull above water: 1,600 tons
      - On freeboard deck: 1,600 tons
      - Above deck: 700 tons

Fittings:
-188 t:  D-E machinery (BW)
-5,400 t:  Repair capabilities, including heavy cranes, landing craft, etc (all over)
-25 t:  L/R wireless (AD)
-25 t:  Extra lighting (AD)
-50 t:  Weight reserve (AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     24,612 lbs / 11,164 Kg = 367.2 x 5.1 " / 130 mm shells or 3.7 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 14.1 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): 0.550 / 0.557
   Length to Beam Ratio: 6.86 : 1
   'Natural speed' for length: 21.74 kts
   Power going to wave formation at top speed: 39 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 20.00 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%,  27.56 ft / 8.40 m,  23.62 ft / 7.20 m
      - Forward deck:   30.00%,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Aft deck:   35.00%,  23.62 ft / 7.20 m,  23.62 ft / 7.20 m
      - Quarter deck:   15.00%,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Average freeboard:      20.39 ft / 6.22 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 51.9%
      - Above water (accommodation/working, high = better): 172.3%
   Waterplane Area: 22,716 Square feet or 2,110 Square metres
   Displacement factor (Displacement / loading): 151%
   Structure weight / hull surface area: 86 lbs/sq ft or 420 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]

Wesoly Class Depot Ship

These are being built to replace the 1912-vintage Wesoly class ships and will simply take the older vessel's names once in service.  It's the kind of vessel that might support a light cruiser and escorts, or a torpedo-boat squadron, or a mix of patrol and MTB assets in a secondary location.

Reasonably armed, and in all parts of the ship, for air-defence purposes.  Relatively fast for a depot ship to facilitate movements within the area of operations, though it won't be enough to escape surface threats.

Edit:  Okay, not reasonably fast, I thought I was working with 20kts rather than 18.

The miscellaneous weight isn't sub-divided, yet, but probably would include some operations space for small-craft leaders, medical facilities and crew amenities, some long-duration accommodation, workshops, and stores.

Not surprisingly it does borrow looks from other small auxiliaries I've sketched of late.


Wesoly, laid down 1932
Dziarski, laid down 1933
Przyjemne, laid down 1933
Czuly, laid down 1934

Small Depot Ship, Enter country Enter ship type laid down 1932

Displacement:
   2,998 t light; 3,101 t standard; 3,708 t normal; 4,193 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (293.83 ft / 285.43 ft) x 52.49 ft x (15.75 / 17.37 ft)
   (89.56 m / 87.00 m) x 16.00 m  x (4.80 / 5.30 m)

Armament:
      2 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 400 per gun
     Dual purpose guns in deck mount, 1932 Model
     1 x Single mount on centreline, aft deck centre
      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, 1932 Model
     2 x Single mounts on sides amidships
      4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1932 Model
     4 x Single mounts on sides, evenly spread
      4 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   0.12" / 3 mm            -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 6,703 shp / 5,000 Kw = 17.98 kts
   Range 8,000nm at 15.00 kts
   Bunker at max displacement = 1,092 tons

Complement:
   236 - 308

Cost:
   £0.623 million / $2.492 million

Distribution of weights at normal displacement:
   Armament: 17 tons, 0.5 %
      - Guns: 17 tons, 0.5 %
   Armour: 2 tons, 0.1 %
      - Armament: 2 tons, 0.1 %
   Machinery: 198 tons, 5.3 %
   Hull, fittings & equipment: 969 tons, 26.1 %
   Fuel, ammunition & stores: 710 tons, 19.1 %
   Miscellaneous weights: 1,812 tons, 48.9 %
      - Hull below water: 400 tons
      - Hull above water: 500 tons
      - On freeboard deck: 512 tons
      - Above deck: 400 tons

Fittings:
-25 t:  L/R wireless
-2 t:  Fire control
-1,700 t:  Ship support for 17,000 t of warships
-85 t:  Weight reserve/dunno yet

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,128 lbs / 4,594 Kg = 331.9 x 3.9 " / 100 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 3.0 ft / 0.9 m
   Roll period: 12.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality  (Average = 1.00): 1.89

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.564
   Length to Beam Ratio: 5.44 : 1
   'Natural speed' for length: 16.89 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   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 %,  19.69 ft / 6.00 m,  15.75 ft / 4.80 m
      - Forward deck:   30.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Aft deck:   35.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Quarter deck:   15.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Average freeboard:      16.06 ft / 4.90 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 46.8 %
      - Above water (accommodation/working, high = better): 132.9 %
   Waterplane Area: 10,457 Square feet or 971 Square metres
   Displacement factor (Displacement / loading): 165 %
   Structure weight / hull surface area: 62 lbs/sq ft or 302 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.79
      - 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