Mine Warfare Craft

[Eugenius]

Type S Minesweeper, in service 1906.  11 ships.

S-1
S-2
S-3
S-4
S-5
S-6
S-7
S-8
S-9
S-10
S-11

Type S, Ukrainian Minesweeper laid down 1906 (Engine 1909)

Displacement:
   172 t light; 180 t standard; 185 t normal; 189 t full load

Dimensions: Length overall / water x beam x draught
   120.00 ft / 120.00 ft x 15.00 ft x 6.00 ft (normal load)
   36.58 m / 36.58 m x 4.57 m  x 1.83 m

Armament:
      2 - 2.95" / 75.0 mm guns in single mounts, 21.00lbs / 9.53kg shells, 1892 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
      2 - 0.75" / 19.1 mm guns in single mounts, 0.21lbs / 0.10kg shells, 1906 Model
     Machine guns in deck mounts
     on side, all amidships
   Weight of broadside 42 lbs / 19 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 528 ihp / 394 Kw = 14.00 kts
   Range 1,200nm at 6.00 kts
   Bunker at max displacement = 9 tons (100% coal)

Complement:
   24 - 32

Cost:
   £0.014 million / $0.058 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.8 %
   Armour: 3 tons, 1.8 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 1.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 41 tons, 21.9 %
   Hull, fittings & equipment: 75 tons, 40.3 %
   Fuel, ammunition & stores: 13 tons, 7.2 %
   Miscellaneous weights: 50 tons, 27.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     189 lbs / 86 Kg = 14.7 x 3.0 " / 75 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.02
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 11.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 38 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.600
   Length to Beam Ratio: 8.00 : 1
   'Natural speed' for length: 10.95 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 19
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      14.00 ft / 4.27 m
      - Forecastle (20 %):   14.00 ft / 4.27 m
      - Mid (50 %):      7.00 ft / 2.13 m
      - Quarterdeck (15 %):   7.00 ft / 2.13 m
      - Stern:      7.00 ft / 2.13 m
      - Average freeboard:   9.45 ft / 2.88 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 115.6 %
      - Above water (accommodation/working, high = better): 88.1 %
   Waterplane Area: 1,288 Square feet or 120 Square metres
   Displacement factor (Displacement / loading): 115 %
   Structure weight / hull surface area: 21 lbs/sq ft or 104 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.75
      - Longitudinal: 13.56
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Eugenius]

Type L Minelayer, in service 1907.  4 ships.

L-1
L-2
L-3
L-4

Type L, Ukrainian Minelayer laid down 1906 (Engine 1909)

Displacement:
   751 t light; 781 t standard; 840 t normal; 887 t full load

Dimensions: Length overall / water x beam x draught
   200.00 ft / 200.00 ft x 35.00 ft x 7.00 ft (normal load)
   60.96 m / 60.96 m x 10.67 m  x 2.13 m

Armament:
      2 - 2.95" / 75.0 mm guns in single mounts, 21.00lbs / 9.53kg shells, 1892 Model
     Quick firing guns in deck mounts
     on centreline, all forward, 1 raised mount
      4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 0.75" / 19.1 mm guns in single mounts, 0.21lbs / 0.10kg shells, 1906 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 94 lbs / 43 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 1 shaft, 5,095 shp / 3,801 Kw = 20.00 kts
   Range 1,900nm at 10.00 kts
   Bunker at max displacement = 107 tons (100% coal)

Complement:
   77 - 101

Cost:
   £0.070 million / $0.281 million

Distribution of weights at normal displacement:
   Armament: 10 tons, 1.2 %
   Armour: 9 tons, 1.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 9 tons, 1.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 255 tons, 30.3 %
   Hull, fittings & equipment: 328 tons, 39.0 %
   Fuel, ammunition & stores: 89 tons, 10.6 %
   Miscellaneous weights: 150 tons, 17.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     894 lbs / 405 Kg = 69.4 x 3.0 " / 75 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.600
   Length to Beam Ratio: 5.71 : 1
   'Natural speed' for length: 14.14 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      17.00 ft / 5.18 m
      - Forecastle (20 %):   17.00 ft / 5.18 m
      - Mid (50 %):      11.00 ft / 3.35 m
      - Quarterdeck (15 %):   11.00 ft / 3.35 m
      - Stern:      11.00 ft / 3.35 m
      - Average freeboard:   13.10 ft / 3.99 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 127.4 %
      - Above water (accommodation/working, high = better): 153.4 %
   Waterplane Area: 5,008 Square feet or 465 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 42 lbs/sq ft or 205 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 3.82
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent

[Blooded]

After 1917 Rebuild:

Type S, Ukraine Coastal Minesweeper laid down 1906 (Engine 1909)

Displacement:
   215 t light; 226 t standard; 272 t normal; 308 t full load

Dimensions: Length overall / water x beam x draught
   120.00 ft / 120.00 ft x 15.00 ft (Bulges 20.00 ft) x 6.60 ft (normal load)
   36.58 m / 36.58 m x 4.57 m (Bulges 6.10 m)  x 2.01 m

Armament:
      1 - 4.72" / 120 mm guns in single mounts, 63.87lbs / 28.97kg shells, 1917 Model
     Quick firing gun in deck mount
     on centreline forward
      1 - 2.95" / 75.0 mm guns in single mounts, 10.80lbs / 4.90kg shells, 1906 Model
     Breech loading gun in deck mount
     on centreline aft
   Weight of broadside 75 lbs / 34 kg
   Shells per gun, main battery: 120

Machinery:
   Oil fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 528 ihp / 394 Kw = 13.06 kts
   Range 4,200nm at 10.00 kts
   Bunker at max displacement = 82 tons

Complement:
   33 - 43

Cost:
   £0.020 million / $0.078 million

Distribution of weights at normal displacement:
   Armament: 8 tons, 3.0 %
   Machinery: 37 tons, 13.6 %
   Hull, fittings & equipment: 81 tons, 29.8 %
   Fuel, ammunition & stores: 56 tons, 20.8 %
   Miscellaneous weights: 89 tons, 32.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     260 lbs / 118 Kg = 4.9 x 4.7 " / 120 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 14.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 66 %
         - Recoil effect (Restricted arc if above 1.00): 0.32
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.600
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 10.95 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 33
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.40 ft / 4.08 m
      - Forecastle (15 %):   13.40 ft / 4.08 m
      - Mid (20 %):      13.40 ft / 4.08 m (6.40 ft / 1.95 m aft of break)
      - Quarterdeck (15 %):   6.40 ft / 1.95 m
      - Stern:      6.40 ft / 1.95 m
      - Average freeboard:   7.80 ft / 2.38 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.0 %
      - Above water (accommodation/working, high = better): 51.3 %
   Waterplane Area: 1,288 Square feet or 120 Square metres
   Displacement factor (Displacement / loading): 119 %
   Structure weight / hull surface area: 26 lbs/sq ft or 127 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.82
      - Longitudinal: 6.05
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc. Weight(89 Tons):
10 Tons Short Range Wireless
40 Tons Minesweeping Gear
36 Tons Mines
3 Tons Reserve

11 Ships:

[Blooded]

After 1917 Rebuild:

Type L, Ukraine Coastal Minelayer laid down 1906 (Engine 1909)

Displacement:
   702 t light; 730 t standard; 840 t normal; 928 t full load

Dimensions: Length overall / water x beam x draught
   200.00 ft / 200.00 ft x 35.00 ft x 7.00 ft (normal load)
   60.96 m / 60.96 m x 10.67 m  x 2.13 m

Armament:
      1 - 4.02" / 102 mm guns in single mounts, 38.58lbs / 17.50kg shells, 1906 Model
     Quick firing gun in deck mounts
     on centreline, all forward
      4 - 2.95" / 75.0 mm guns in single mounts, 10.80lbs / 4.90kg shells, 1906 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 82 lbs / 37 kg
   Shells per gun, main battery: 200

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 5,095 shp / 3,801 Kw = 20.00 kts
   Range 3,200nm at 12.00 kts
   Bunker at max displacement = 199 tons

Complement:
   77 - 101

Cost:
   £0.066 million / $0.263 million

Distribution of weights at normal displacement:
   Armament: 10 tons, 1.2 %
   Machinery: 232 tons, 27.6 %
   Hull, fittings & equipment: 310 tons, 36.9 %
   Fuel, ammunition & stores: 138 tons, 16.4 %
   Miscellaneous weights: 150 tons, 17.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     942 lbs / 427 Kg = 29.1 x 4.0 " / 102 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 12.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 58 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 0.89

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.600
   Length to Beam Ratio: 5.71 : 1
   'Natural speed' for length: 14.14 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      17.00 ft / 5.18 m
      - Forecastle (15 %):   17.00 ft / 5.18 m
      - Mid (20 %):      17.00 ft / 5.18 m (11.00 ft / 3.35 m aft of break)
      - Quarterdeck (15 %):   11.00 ft / 3.35 m
      - Stern:      11.00 ft / 3.35 m
      - Average freeboard:   12.20 ft / 3.72 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 119.0 %
      - Above water (accommodation/working, high = better): 141.6 %
   Waterplane Area: 5,008 Square feet or 465 Square metres
   Displacement factor (Displacement / loading): 121 %
   Structure weight / hull surface area: 42 lbs/sq ft or 203 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 3.03
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc. Weight(89 Tons):
10 Tons Short Range Wireless
40 Tons Minesweeping Gear
36 Tons Mines
3 Tons Reserve

4 Ships:

[Blooded]

Miner Class, Ukraine Patrol/Minesweeper laid down 1915 (Engine 1912)

Displacement:
   478 t light; 496 t standard; 553 t normal; 599 t full load

Dimensions: Length overall / water x beam x draught
   229.35 ft / 220.00 ft x 32.00 ft x 5.50 ft (normal load)
   69.91 m / 67.06 m x 9.75 m  x 1.68 m

Armament:
      2 - 4.02" / 102 mm guns in single mounts, 38.58lbs / 17.50kg shells, 1915 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread, all raised mounts
      2 - 1.85" / 47.0 mm guns in single mounts, 3.00lbs / 1.36kg shells, 1915 Model
     Quick firing guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 83 lbs / 38 kg
   Shells per gun, main battery: 150

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 1,000 ihp / 746 Kw = 14.56 kts
   Range 4,350nm at 8.00 kts
   Bunker at max displacement = 103 tons (100% coal)

Complement:
   56 - 74

Cost:
   £0.049 million / $0.195 million

Distribution of weights at normal displacement:
   Armament: 9 tons, 1.6 %
   Machinery: 66 tons, 12.0 %
   Hull, fittings & equipment: 213 tons, 38.5 %
   Fuel, ammunition & stores: 75 tons, 13.6 %
   Miscellaneous weights: 190 tons, 34.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     827 lbs / 375 Kg = 25.6 x 4.0 " / 102 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0.09
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.500
   Length to Beam Ratio: 6.88 : 1
   'Natural speed' for length: 14.83 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 6.00 ft / 1.83 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      12.50 ft / 3.81 m
      - Forecastle (20 %):   10.75 ft / 3.28 m
      - Mid (35 %):      10.00 ft / 3.05 m (5.00 ft / 1.52 m aft of break)
      - Quarterdeck (20 %):   5.25 ft / 1.60 m
      - Stern:      7.50 ft / 2.29 m
      - Average freeboard:   7.43 ft / 2.26 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.2 %
      - Above water (accommodation/working, high = better): 98.7 %
   Waterplane Area: 4,509 Square feet or 419 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 36 lbs/sq ft or 174 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.12
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc. Weight(190 Tons):
Short Range Wireless
15 Tons Minesweeping Gear
25 Tons Reel and Paravanes
120 Tons Mine Bunker
30 Ton Reserve