Korsarze (Corsairs - was Torpedo-Boat Carriers)

[The Rock Doctor]

Not really sure there'll be many of them but here we go.

Note:  Change in nomenclature for 1917, reflecting the more multi-mission capability of the second ship.

[The Rock Doctor]

Orzel Class Korsarz


The Union, like everybody else, is hopping aboard the torpedo-boat carrier bandwagon - at least for the purposes of building a prototype for trials and testing.

The Union considered what was known about various existing models worldwide, which wasn't a great deal, and concluded that there were (potentially) tactical and strategic functions for such a ship. 

The strategic role was about long-term basing, which involved ample and comfortable MTB crew accommodation, supplies of expendables, workshops and spare parts - a depot ship.  Such a ship was notionally on the slow side, since it spent most of its life anchored as a floating base, and probably wouldn't be heavily armed or armored.

The tactical role was about short-term transport in and out of a combat zone, with a limited number of actual missions corresponding to the duration of a naval battle or until the loss of tactical surprise.  This was generally in line with what was known about Parthian torpedo-boat carriers.  The Union went a step further, though, and ruled out a back-up role as a protected cruiser.  The amount of space and weight dedicated to the MTBs would mean the ship would be under-armed, armored, or propelled compared to actual protected cruisers of the same size.

So the ship is designed around these principles:

-The ship and its cargo are a scalpel, to be used for surprise raids rather than fleet actions.  Their value rapidly decreases once the enemy is aware of their presence.  Hence, only a limited amount of expendables are embarked and depot ship functions are not built in, because the ship will conduct its mission and then return to base.

-Large powerplant and good seakeeping allowing fast transit into and out of the combat zone, ideally at night.

-Long hull with a crane and cradle on the beam for each MTB, theoretically allowing for simultaneous unloading and loading of all six MTB in the shortest possible time period.

-No armor and limited armament - though theoretically sufficient to deal with a patrol craft, sacrifices must be made.

Orzel, KS-1, laid down 1914

AS REFITTED, 1931

Enter ship name, Enter country Enter ship type laid down 1914 (Engine 1931)

Displacement:
   3,622 t light; 3,746 t standard; 3,994 t normal; 4,193 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (436.95 ft / 426.51 ft) x 45.93 ft x (14.27 / 14.80 ft)
   (133.18 m / 130.00 m) x 14.00 m  x (4.35 / 4.51 m)

Armament:
      3 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1914 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      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, 1914 Model
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
     2 x Single mounts on sides, forward deck aft
      6 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1914 Model
     1 x Twin mount on centreline, aft deck forward
      1 raised mount
     2 x Twin mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 220 lbs / 100 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm      1.97" / 50 mm
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 44,235 shp / 33,000 Kw = 30.21 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 447 tons

Complement:
   250 - 326

Cost:
   £0.424 million / $1.694 million

Distribution of weights at normal displacement:
   Armament: 60 tons, 1.5%
      - Guns: 60 tons, 1.5%
   Armour: 36 tons, 0.9%
      - Armament: 14 tons, 0.4%
      - Conning Tower: 21 tons, 0.5%
   Machinery: 1,323 tons, 33.1%
   Hull, fittings & equipment: 1,387 tons, 34.7%
   Fuel, ammunition & stores: 372 tons, 9.3%
   Miscellaneous weights: 816 tons, 20.4%
      - Hull below water: 100 tons
      - Hull above water: 300 tons
      - On freeboard deck: 360 tons
      - Above deck: 56 tons

-96 t:  12 missions worth of MTB ammo/fuel (2 x18" torpedo & 4 t fuel per boat-mission) (BW)
-300 t:  Accommodation for 150 personnel (Some combo of up to 120 naval infantry, 18 landing craft crew, and/or 36 MTB personnel (AW)
-360 t:  6 x 20 t MTB, cradle, and cranes (FD)
-25 t:  Night-fighting doodads (AD)
-25 t:  L/R wireless (AD)
-6 t:  1908 Fire Control (AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,226 lbs / 1,463 Kg = 48.1 x 5.1 " / 130 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 14.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 62 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.506
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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%,  21.98 ft / 6.70 m,  17.06 ft / 5.20 m
      - Forward deck:   30.00%,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   35.00%,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Quarter deck:   15.00%,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      17.45 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 123.9%
      - Above water (accommodation/working, high = better): 169.7%
   Waterplane Area: 13,053 Square feet or 1,213 Square metres
   Displacement factor (Displacement / loading): 108%
   Structure weight / hull surface area: 64 lbs/sq ft or 310 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.89
      - Overall: 0.91
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

AS BUILT

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

Displacement:
   3,543 t light; 3,654 t standard; 3,994 t normal; 4,266 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (436.95 ft / 426.51 ft) x 45.93 ft x (14.27 / 15.00 ft)
   (133.18 m / 130.00 m) x 14.00 m  x (4.35 / 4.57 m)

Armament:
      3 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1914 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      4 - 0.39" / 10.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1914 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      1 - 2.95" / 75.0 mm 45.0 cal gun - 12.99lbs / 5.89kg shells, 250 per gun
     Anti-air gun in deck mount, 1914 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount
      Weight of broadside 216 lbs / 98 kg

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

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 37,533 shp / 28,000 Kw = 29.04 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 613 tons

Complement:
   250 - 326

Cost:
   £0.441 million / $1.764 million

Distribution of weights at normal displacement:
   Armament: 57 tons, 1.4 %
      - Guns: 57 tons, 1.4 %
   Armour: 37 tons, 0.9 %
      - Armament: 16 tons, 0.4 %
      - Conning Tower: 21 tons, 0.5 %
   Machinery: 1,446 tons, 36.2 %
   Hull, fittings & equipment: 1,360 tons, 34.0 %
   Fuel, ammunition & stores: 451 tons, 11.3 %
   Miscellaneous weights: 643 tons, 16.1 %
      - Hull below water: 100 tons
      - Hull above water: 200 tons
      - On freeboard deck: 293 tons
      - Above deck: 50 tons

Fittings:
360 t: 6 x 20 t MTB, cradle, and cranes
100 t:  MTB crew accommodation
96 t:  12 missions worth of MTB ammo/fuel (2 x18" torpedo & 4 t fuel per boat-mission)
31 t:  Weight reserve
25 t:  Night-fighting doodads
25 t:  L/R wireless
6 t:  1908 Fire Control

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,957 lbs / 1,341 Kg = 44.1 x 5.1 " / 130 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 2.0 ft / 0.6 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.508
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 20.65 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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 %,  21.98 ft / 6.70 m,  17.06 ft / 5.20 m
      - Forward deck:   40.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Quarter deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      17.45 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 130.5 %
      - Above water (accommodation/working, high = better): 169.7 %
   Waterplane Area: 13,053 Square feet or 1,213 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 62 lbs/sq ft or 304 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.85
      - Overall: 0.91
   Cramped 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]

Rybolow Class Korsarz

The Rybolow is about 20% heavier than the Orzel, which allows:

-An extra knot or so of speed
-A slightly heavier main battery
-Two extra cradles/davits for MTB or landing craft, and
-The capability of carrying a company of 120 marines

Notionally the strike group would be either 8 x MTB-B/C, or 2 MTB & 6 landing craft carrying marines.  There's probably a scenario where the ship might embark four and four, and another where it might take on a full eight landing craft for some reason. 

At any rate, it does provide the Union Navy with a multi-function, high-speed nuisance ship that could attack enemy bases, installations, or other facilities in different ways.

Rybolow, KS-2, laid down 1917
Jastrzab, KS-3, laid down 1919

Enter ship name, Enter country Enter ship type laid down 1917

Displacement:
   4,368 t light; 4,507 t standard; 4,880 t normal; 5,178 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (491.08 ft / 482.28 ft) x 45.93 ft x (15.42 / 16.13 ft)
   (149.68 m / 147.00 m) x 14.00 m  x (4.70 / 4.92 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1917 Model
     2 x Twin mounts on centreline, evenly spread
      4 - 0.39" / 10.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 4,000 per gun
     Machine guns in deck mounts, 1917 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 250 per gun
     Anti-air guns in deck mounts, 1917 Model
     2 x Single mounts on centreline, evenly spread
      2 raised mounts
      Weight of broadside 297 lbs / 135 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:   0.39" / 10 mm         -               -
   3rd:   0.79" / 20 mm   0.39" / 10 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 45,577 shp / 34,000 Kw = 30.07 kts
   Range 8,500nm at 10.00 kts
   Bunker at max displacement = 671 tons

Complement:
   291 - 379

Cost:
   £0.752 million / $3.010 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 1.3 %
      - Guns: 64 tons, 1.3 %
   Armour: 22 tons, 0.5 %
      - Armament: 22 tons, 0.5 %
   Machinery: 1,671 tons, 34.2 %
   Hull, fittings & equipment: 1,613 tons, 33.0 %
   Fuel, ammunition & stores: 512 tons, 10.5 %
   Miscellaneous weights: 999 tons, 20.5 %
      - Hull below water: 160 tons
      - Hull above water: 300 tons
      - On freeboard deck: 480 tons
      - Above deck: 59 tons

Fittings:
-480 t:  Cradles for 8 x MTB-B or -C, or 20 t landing craft
-300 t:  Accommodation for 150 personnel (120 marines, 18 landing craft crew and 12 MTB crew or just 48 MTB crew)
-148 t:  Fuel and ordinance for 16 MTB sorties (below water)
-25 t:  Night-fighting doodads
-25 t:  L/R wireless
-7 t:  Fire control
-14 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,503 lbs / 1,589 Kg = 52.3 x 5.1 " / 130 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 1.8 ft / 0.6 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.507
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   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 %,  21.98 ft / 6.70 m,  17.06 ft / 5.20 m
      - Forward deck:   40.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Quarter deck:   20.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      17.45 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 126.8 %
      - Above water (accommodation/working, high = better): 164.8 %
   Waterplane Area: 14,759 Square feet or 1,371 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 64 lbs/sq ft or 312 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 1.50
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped 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]

Sowy Class Korsarz

After considerable thought on the subject, the Union Navy has decided to lay down two new Korsarz of the Sowy (Owl) class.

Nearly twenty years has elapsed since the Rybolow class was built.  This new class benefits from newer, lighter machinery; a transom stern; improved welding and construction techniques; and a more mature sense of what should be included in the package.

The type remains capable of operating as an MTB carrier or a fast transport.  It also adds more capability as a blockade-runner with dedicated wet and dry stores and greater deck cargo capacity if the small craft are landed.

Armament includes a heavier battery, and this will be one of the first Union classes to field the twin 25mm machine-gun in place of the 15mm machine gun.  A Huelsmeyer device and an enhanced hydrophone package have been added to improve the ship's awareness of its environment.

Sowy will replace the prototype korsarz, Orzel.  A second unit will take the place of a hypothetical rebuild of the tiny carrier Labedz.  You'll recall Labedz was based on the Rybolow class korsarz and there was a notion to convert her from carrier to korsarz once replaced by a dedicated training carrier.  That notion is no longer favored given how much improved the Sowy class will be in comparison.



Sowy, KS-4, laid down 1936

Enter ship name, Enter country Enter ship type laid down 1936

Displacement:
    4,503 t light; 4,709 t standard; 5,406 t normal; 5,964 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (512.56 ft / 498.69 ft) x 49.21 ft x (15.42 / 16.59 ft)
    (156.23 m / 152.00 m) x 15.00 m  x (4.70 / 5.06 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, 1936 Model
      2 x 2-gun mounts on centreline, evenly spread
      8 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
      Anti-air guns in deck mounts, 1936 Model
      2 x Twin mounts on centreline, evenly spread
        2 raised mounts
      2 x Twin mounts on sides amidships
        2 raised mounts
      8 - 0.98" / 25.0 mm 70.0 cal guns - 0.53lbs / 0.24kg shells, 4,000 per gun
      Machine guns in deck mounts, 1936 Model
      4 x Twin mounts on sides, evenly spread
        4 raised mounts
      Weight of broadside 308 lbs / 140 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:
    Oil fired boilers, steam turbines,
    Geared drive, 2 shafts, 57,641 shp / 43,000 Kw = 32.05 kts
    Range 8,000nm at 15.00 kts
    Bunker at max displacement = 1,255 tons

Complement:
    314 - 409

Cost:
    £2.177 million / $8.708 million

Distribution of weights at normal displacement:
    Armament: 87 tons, 1.6 %
      - Guns: 87 tons, 1.6 %
    Armour: 26 tons, 0.5 %
      - Armament: 26 tons, 0.5 %
    Machinery: 1,617 tons, 29.9 %
    Hull, fittings & equipment: 1,510 tons, 27.9 %
    Fuel, ammunition & stores: 903 tons, 16.7 %
    Miscellaneous weights: 1,263 tons, 23.4 %
      - Hull below water: 415 tons
      - Hull above water: 300 tons
      - On freeboard deck: 438 tons
      - Above deck: 110 tons

Fittings:
-15 t:  Enhanced hydrophone package (BW)
-200 t:  Wet stores (BW)
-200 t:  Dry stores (BW)
-300 t:  Accommodation for 150 (long-term) or 600 (surge) personnel (AW)
-240 t:  Six heavyweight davits for up to 6x20t small craft (FD)
-198 t:  Deck cargo, including up to 6x20 t small craft or 800 (surge) additional personnel (FD)
-25 t:  Capital ship Huelsmeyer device (AD)
-25 t:  L/R wireless (AD)
-25 t:  Operations space (AD)
-10 t:  Additional S/R wireless (AD)
-10 t:  Nightfighting doodads (AD)
-9 t:  1936 fire control (AD)
-6 t:  Weight reserve (AD)

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      4,114 lbs / 1,866 Kg = 61.4 x 5.1 " / 130 mm shells or 0.9 torpedoes
    Stability (Unstable if below 1.00): 1.20
    Metacentric height 2.4 ft / 0.7 m
    Roll period: 13.3 seconds
    Steadiness    - As gun platform (Average = 50 %): 60 %
            - Recoil effect (Restricted arc if above 1.00): 0.14
    Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
    Hull has rise forward of midbreak,
      a normal bow and small transom stern
    Block coefficient (normal/deep): 0.500 / 0.513
    Length to Beam Ratio: 10.13 : 1
    'Natural speed' for length: 23.95 kts
    Power going to wave formation at top speed: 60 %
    Trim (Max stability = 0, Max steadiness = 100): 52
    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 %,  24.61 ft / 7.50 m,  19.69 ft / 6.00 m
      - Forward deck:    55.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:    15.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Quarter deck:    10.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Average freeboard:        18.11 ft / 5.52 m

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 117.9 %
        - Above water (accommodation/working, high = better): 182.8 %
    Waterplane Area: 16,743 Square feet or 1,555 Square metres
    Displacement factor (Displacement / loading): 113 %
    Structure weight / hull surface area: 56 lbs/sq ft or 276 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0.71
        - Longitudinal: 1.21
        - Overall: 0.75
    Caution: Hull subject to strain in open-sea
    Cramped machinery, storage, compartmentation space
    Excellent accommodation and workspace room