Battleships

[The Rock Doctor]

To be expanded upon...

[The Rock Doctor]

Osman I Class Battleship

These are the oldest battleships still active in the Ottoman inventory.  The lead four units were built in Germany; the latter two, with some difficulty, domestically.  Now rather emphatically obsolete, they serve as flagships and training vessels in the Empire's expanses.

Osman I, laid down 1888
Suleiman I, laid down 1889
Ertugrul, laid down 1889
Orhan, laid down 1890
Selim I, laid down 1890
Mehmed II, laid down 1891

Enter ship name, Enter country Enter ship type laid down 1885

Displacement:
   3,797 t light; 3,945 t standard; 4,480 t normal; 4,907 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (260.50 ft / 250.66 ft) x 48.88 ft x (19.69 / 21.28 ft)
   (79.40 m / 76.40 m) x 14.90 m  x (6.00 / 6.49 m)

Armament:
      3 - 9.45" / 240 mm 35.0 cal guns - 380.38lbs / 172.54kg shells, 68 per gun
     Breech loading guns in turret on barbette mounts, 1885 Model
     2 x Single mounts on sides, forward deck centre
     1 x Single mount on centreline, aft deck centre
      6 - 3.46" / 88.0 mm 30.0 cal guns - 18.43lbs / 8.36kg shells, 250 per gun
     Quick firing guns in deck mounts, 1885 Model
     6 x Single mounts on sides, evenly spread
      Weight of broadside 1,252 lbs / 568 kg
      Main Torpedoes
      2 - 13.8" / 350 mm, 16.40 ft / 5.00 m torpedoes - 0.202 t each, 0.404 t total
   In 2 sets of deck mounted side rotating tubes
      2nd Torpedoes
      2 - 17.7" / 450 mm, 16.40 ft / 5.00 m torpedoes - 0.347 t each, 0.695 t total
   In 2 sets of deck mounted side rotating tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.45" / 240 mm   137.86 ft / 42.02 m   8.40 ft / 2.56 m
   Ends:   7.09" / 180 mm   112.76 ft / 34.37 m   8.40 ft / 2.56 m
     Main Belt covers 85 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.87" / 200 mm   3.94" / 100 mm      7.87" / 200 mm
   2nd:   0.98" / 25 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.18" / 30 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 7.09" / 180 mm, Aft 1.97" / 50 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 3,351 ihp / 2,500 Kw = 14.17 kts
   Range 4,500nm at 10.00 kts
   Bunker at max displacement = 962 tons (100% coal)

Complement:
   273 - 355

Cost:
   £0.311 million / $1.243 million

Distribution of weights at normal displacement:
   Armament: 263 tons, 5.9 %
      - Guns: 260 tons, 5.8 %
      - Weapons: 2 tons, 0.0 %
   Armour: 1,407 tons, 31.4 %
      - Belts: 772 tons, 17.2 %
      - Armament: 375 tons, 8.4 %
      - Armour Deck: 207 tons, 4.6 %
      - Conning Towers: 53 tons, 1.2 %
   Machinery: 651 tons, 14.5 %
   Hull, fittings & equipment: 1,355 tons, 30.3 %
   Fuel, ammunition & stores: 682 tons, 15.2 %
   Miscellaneous weights: 121 tons, 2.7 %
      - Hull above water: 121 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,675 lbs / 3,028 Kg = 17.1 x 9.4 " / 240 mm shells or 10.3 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 12.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.58
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.659
   Length to Beam Ratio: 5.13 : 1
   'Natural speed' for length: 15.83 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   25.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Quarter deck:   15.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Average freeboard:      16.54 ft / 5.04 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 68.5 %
      - Above water (accommodation/working, high = better): 100.5 %
   Waterplane Area: 9,387 Square feet or 872 Square metres
   Displacement factor (Displacement / loading): 123 %
   Structure weight / hull surface area: 99 lbs/sq ft or 484 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 4.03
      - 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]

Bayezid I Class Battleship

The last of the preceding Osman I class had barely been laid down when the decision was made to order even larger battleships similar to the German Brandenburg class.

The lead unit was laid down in Germany, the others domestically, albeit with a number of imported specialty items.

The Murad IV was destroyed by an internal explosion very shortly after entering service; an accumulation of coal dust is believed to have been the cause.  A German-built Brandenburg class ship was ordered as a replacement.

Bayezid I, laid down 1891
Murad IV, laid down 1892, lost 1894
Ahmed III, laid down 1893
Mustafa III, laid down 1894


Enter ship name, Enter country Enter ship type laid down 1891 (Engine 1890)

Displacement:
   9,997 t light; 10,358 t standard; 11,067 t normal; 11,634 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (389.44 ft / 379.59 ft) x 65.62 ft x (25.92 / 27.01 ft)
   (118.70 m / 115.70 m) x 20.00 m  x (7.90 / 8.23 m)

Armament:
      4 - 11.02" / 280 mm 40.0 cal guns - 529.11lbs / 240.00kg shells, 60 per gun
     Breech loading guns in turret on barbette mounts, 1891 Model
     2 x Twin mounts on centreline, evenly spread
      2 - 11.02" / 280 mm 35.0 cal guns - 529.11lbs / 240.00kg shells, 60 per gun
     Breech loading guns in turret on barbette mount, 1891 Model
     1 x Twin mount on centreline, aft deck centre
      8 - 4.13" / 105 mm 40.0 cal guns - 40.12lbs / 18.20kg shells, 90 per gun
     Quick firing guns in casemate mounts, 1891 Model
     8 x Single mounts on sides, forward deck aft
      8 - 3.46" / 88.0 mm 30.0 cal guns - 15.43lbs / 7.00kg shells, 250 per gun
     Breech loading guns in casemate mounts, 1891 Model
     4 x Single mounts on sides, aft evenly spread
     4 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in all but light seas
      Weight of broadside 3,619 lbs / 1,642 kg
      Main Torpedoes
      4 - 17.7" / 450 mm, 16.40 ft / 5.00 m torpedoes - 0.425 t each, 1.700 t total
   In 2 sets of deck mounted side rotating tubes
      2nd Torpedoes
      2 - 17.7" / 450 mm, 16.40 ft / 5.00 m torpedoes - 0.425 t each, 0.850 t total
   submerged bow tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   15.7" / 400 mm   215.55 ft / 65.70 m   8.01 ft / 2.44 m
   Ends:   11.8" / 300 mm   164.04 ft / 50.00 m   8.01 ft / 2.44 m
   Upper:   4.72" / 120 mm     49.21 ft / 15.00 m   8.01 ft / 2.44 m
     Main Belt covers 87 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   3.94" / 100 mm      11.8" / 300 mm
   2nd:   11.8" / 300 mm   3.94" / 100 mm      11.8" / 300 mm
   3rd:   1.97" / 50 mm         -         1.97" / 50 mm
   4th:   1.18" / 30 mm         -         1.18" / 30 mm

   - Protected deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 11.81" / 300 mm, Aft 1.97" / 50 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 3 shafts, 10,053 ihp / 7,500 Kw = 17.20 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 1,277 tons (100% coal)

Complement:
   539 - 701

Cost:
   £0.944 million / $3.777 million

Distribution of weights at normal displacement:
   Armament: 657 tons, 5.9 %
      - Guns: 652 tons, 5.9 %
      - Weapons: 5 tons, 0.0 %
   Armour: 3,639 tons, 32.9 %
      - Belts: 1,981 tons, 17.9 %
      - Armament: 813 tons, 7.3 %
      - Armour Deck: 698 tons, 6.3 %
      - Conning Towers: 147 tons, 1.3 %
   Machinery: 1,952 tons, 17.6 %
   Hull, fittings & equipment: 3,438 tons, 31.1 %
   Fuel, ammunition & stores: 1,070 tons, 9.7 %
   Miscellaneous weights: 311 tons, 2.8 %
      - Hull above water: 311 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,413 lbs / 5,630 Kg = 18.5 x 11.0 " / 280 mm shells or 5.6 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 3.9 ft / 1.2 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 1.65

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.605
   Length to Beam Ratio: 5.79 : 1
   'Natural speed' for length: 19.48 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 43
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   25.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Quarter deck:   15.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Average freeboard:      16.54 ft / 5.04 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 86.6 %
      - Above water (accommodation/working, high = better): 102.3 %
   Waterplane Area: 18,217 Square feet or 1,692 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 133 lbs/sq ft or 649 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.44
      - Overall: 1.00
   Adequate 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]

Mahmud II Class Battleship

The Ottomans were determined to build their next class of battleship domestically, although specialty items such as heavy guns or machinery would still need to be imported.  For simplicity's sake, the preceding Bayezid I class was stretched to allow standardization of the main battery.

The near-simultaneous construction of these ships has imposed significant strain on the Ottoman naval budget.  Abdulaziz remains under construction as the sim begins.

Mahmud II, laid down 1898
Abdulmecid, laid down 1898
Abdulaziz, laid down 1899

Enter ship name, Enter country Enter ship type laid down 1898

Displacement:
   11,871 t light; 12,436 t standard; 13,293 t normal; 13,979 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (429.79 ft / 429.79 ft) x 75.46 ft x (26.08 / 27.14 ft)
   (131.00 m / 131.00 m) x 23.00 m  x (7.95 / 8.27 m)

Armament:
      6 - 11.02" / 280 mm 40.0 cal guns - 529.11lbs / 240.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1898 Model
     3 x Twin mounts on centreline, evenly spread
      12 - 5.91" / 150 mm 40.0 cal guns - 88.18lbs / 40.00kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1898 Model
     12 x Single mounts on sides, forward evenly spread
      16 - 3.46" / 88.0 mm 40.0 cal guns - 15.43lbs / 7.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1898 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      Weight of broadside 4,480 lbs / 2,032 kg
      Main Torpedoes
      4 - 17.7" / 450 mm, 16.40 ft / 5.00 m torpedoes - 0.521 t each, 2.085 t total
   submerged side tubes
      2nd Torpedoes
      1 - 17.7" / 450 mm, 16.40 ft / 5.00 m torpedo - 0.521 t total
   submerged bow tube

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   239.67 ft / 73.05 m   10.43 ft / 3.18 m
   Ends:   3.94" / 100 mm   190.09 ft / 57.94 m   10.43 ft / 3.18 m
   Upper:   3.94" / 100 mm   239.67 ft / 73.05 m   16.01 ft / 4.88 m
     Main Belt covers 86 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   3.94" / 100 mm      11.8" / 300 mm
   2nd:   1.97" / 50 mm         -         1.97" / 50 mm
   3rd:   1.18" / 30 mm         -         1.18" / 30 mm

   - Protected deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 2.36" / 60 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 1.97" / 50 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 3 shafts, 13,405 ihp / 10,000 Kw = 18.24 kts
   Range 5,000nm at 10.00 kts
   Bunker at max displacement = 1,543 tons (100% coal)

Complement:
   618 - 804

Cost:
   £1.102 million / $4.407 million

Distribution of weights at normal displacement:
   Armament: 837 tons, 6.3 %
      - Guns: 831 tons, 6.3 %
      - Weapons: 5 tons, 0.0 %
   Armour: 4,631 tons, 34.8 %
      - Belts: 2,566 tons, 19.3 %
      - Armament: 1,007 tons, 7.6 %
      - Armour Deck: 915 tons, 6.9 %
      - Conning Towers: 143 tons, 1.1 %
   Machinery: 2,162 tons, 16.3 %
   Hull, fittings & equipment: 3,903 tons, 29.4 %
   Fuel, ammunition & stores: 1,422 tons, 10.7 %
   Miscellaneous weights: 338 tons, 2.5 %
      - Hull above water: 338 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     17,101 lbs / 7,757 Kg = 25.5 x 11.0 " / 280 mm shells or 5.7 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.88

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.556
   Length to Beam Ratio: 5.70 : 1
   'Natural speed' for length: 20.73 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
      - Forward deck:   30.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
      - Aft deck:   25.00 %,  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:      17.85 ft / 5.44 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 83.1 %
      - Above water (accommodation/working, high = better): 121.5 %
   Waterplane Area: 22,634 Square feet or 2,103 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 128 lbs/sq ft or 625 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.27
      - 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]

Agir Dag Class Battleship

This is not quite a stretched version of the last ship, but it's close.  The main belt isn't 4.2 m the whole way, but more like 3.6 metres the whole way and then a full deck higher on the forward 25% (with the raised forecastle).

The 15cm are notionally concentrated at the end of the forecastle and then in a block forward of Y turret.  It would logically lead to turreted secondaries down the road, ala historical Italian practice.

The cost of the class has "broken" typical Ottoman capital ship planning, so the government will need to decide whether to build a third ship later or move to a two-ship division model.

Agir Dag, laid down 1904
Musala, laid down 1904

Enter ship name, Enter country Enter ship type laid down 1905

Displacement:
   14,641 t light; 15,366 t standard; 16,225 t normal; 16,912 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (492.13 ft / 492.13 ft) x 75.46 ft x (25.92 / 26.81 ft)
   (150.00 m / 150.00 m) x 23.00 m  x (7.90 / 8.17 m)

Armament:
      8 - 11.02" / 280 mm 45.0 cal guns - 675.51lbs / 306.40kg shells, 80 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     1 x Twin mount on centreline, forward deck centre
     3 x Twin mounts on centreline, aft evenly spread
      16 - 5.91" / 150 mm 45.0 cal guns - 103.86lbs / 47.11kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1905 Model
     8 x Single mounts on sides, forward deck aft
      4 hull mounts in casemates- Limited use in heavy seas
     8 x Single mounts on sides, aft evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
      12 - 3.46" / 88.0 mm 45.0 cal guns - 20.97lbs / 9.51kg shells, 150 per gun
     Breech loading guns in deck mounts, 1905 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      6 - 0.31" / 8.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1905 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 7,317 lbs / 3,319 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   344.49 ft / 105.00 m   13.78 ft / 4.20 m
   Ends:   3.94" / 100 mm   147.61 ft / 44.99 m   11.81 ft / 3.60 m
   Upper:   5.91" / 150 mm   344.49 ft / 105.00 m   7.87 ft / 2.40 m
     Main Belt covers 108 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   3.94" / 100 mm      11.8" / 300 mm
   2nd:   1.97" / 50 mm         -         5.91" / 150 mm
   3rd:   0.79" / 20 mm   0.39" / 10 mm            -
   4th:   0.39" / 10 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 2.36" / 60 mm

   - Conning towers: Forward 11.81" / 300 mm, Aft 11.81" / 300 mm

Machinery:
   Coal and oil fired boilers, reciprocating cruising steam engines and steam turbines
   Geared drive, 4 shafts, 20,000 ihp / 14,920 Kw = 19.81 kts
   Range 5,000nm at 10.00 kts
   Bunker at max displacement = 1,546 tons (90% coal)

Complement:
   718 - 934

Cost:
   £1.402 million / $5.606 million

Distribution of weights at normal displacement:
   Armament: 1,271 tons, 7.8 %
      - Guns: 1,271 tons, 7.8 %
   Armour: 6,086 tons, 37.5 %
      - Belts: 3,338 tons, 20.6 %
      - Armament: 1,270 tons, 7.8 %
      - Armour Deck: 1,151 tons, 7.1 %
      - Conning Towers: 326 tons, 2.0 %
   Machinery: 2,095 tons, 12.9 %
   Hull, fittings & equipment: 4,697 tons, 28.9 %
   Fuel, ammunition & stores: 1,584 tons, 9.8 %
   Miscellaneous weights: 492 tons, 3.0 %
      - On freeboard deck: 492 tons
         --100 t:  Command facilities
         --35 t:  Long and short-ranged wireless
         --357 t:  Construction reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,618 lbs / 9,352 Kg = 30.8 x 11.0 " / 280 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.60
   Seaboat quality  (Average = 1.00): 1.59

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.590 / 0.594
   Length to Beam Ratio: 6.52 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 44
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  22.31 ft / 6.80 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 %,  15.75 ft / 4.80 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:      16.80 ft / 5.12 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 75.7 %
      - Above water (accommodation/working, high = better): 115.1 %
   Waterplane Area: 26,907 Square feet or 2,500 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 135 lbs/sq ft or 661 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.73
      - 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