Ships of the US Navy

[KWorld]

And a very large stack-turreted AXY battleship.  As big as this ship is, I'm not at all sure it's worthwhile, but it would be pretty scary.

USS Connecticutt Stacked, USA Battleship laid down 1903 (Engine 1905)

Displacement:
   16,801 t light; 17,789 t standard; 18,965 t normal; 19,906 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (532.01 ft / 530.00 ft) x 80.00 ft x (25.25 / 26.29 ft)
   (162.16 m / 161.54 m) x 24.38 m  x (7.70 / 8.01 m)

Armament:
      6 - 12.00" / 305 mm 45.0 cal guns - 870.01lbs / 394.63kg shells, 80 per gun
     Breech loading guns in turret on barbette mounts, 1903 Model
     3 x Twin mounts on centreline ends, majority aft
      6 - 10.00" / 254 mm 45.0 cal guns - 510.00lbs / 231.33kg shells, 100 per gun
     Breech loading guns in deck and hoist mounts, 1903 Model
     3 x Twin mounts on sides, forward deck aft
      3 raised mounts
      14 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1903 Model
     14 x Single mounts on sides, evenly spread
      14 hull mounts in casemates- Limited use in heavy seas
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 500 per gun
     Quick firing guns in casemate mounts, 1903 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 9,906 lbs / 4,493 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   280.90 ft / 85.62 m   14.00 ft / 4.27 m
   Ends:   5.00" / 127 mm   249.08 ft / 75.92 m   8.00 ft / 2.44 m
   Upper:   9.00" / 229 mm   280.90 ft / 85.62 m   8.00 ft / 2.44 m
     Main Belt covers 82 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm   6.00" / 152 mm      10.0" / 254 mm
   2nd:   10.0" / 254 mm   6.00" / 152 mm            -
   3rd:   5.00" / 127 mm         -         4.00" / 102 mm
   4th:   2.00" / 51 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.50" / 64 mm
   Forecastle: 2.50" / 64 mm  Quarter deck: 2.50" / 64 mm

   - Conning towers: Forward 14.00" / 356 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 15,318 ihp / 11,427 Kw = 18.00 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 2,117 tons (100% coal)

Complement:
   807 - 1,050

Cost:
   £1.763 million / $7.053 million

Distribution of weights at normal displacement:
   Armament: 1,858 tons, 9.8 %
      - Guns: 1,858 tons, 9.8 %
   Armour: 6,563 tons, 34.6 %
      - Belts: 3,448 tons, 18.2 %
      - Armament: 1,337 tons, 7.0 %
      - Armour Deck: 1,472 tons, 7.8 %
      - Conning Towers: 306 tons, 1.6 %
   Machinery: 2,220 tons, 11.7 %
   Hull, fittings & equipment: 6,119 tons, 32.3 %
   Fuel, ammunition & stores: 2,164 tons, 11.4 %
   Miscellaneous weights: 41 tons, 0.2 %
      - Hull below water: 16 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     22,916 lbs / 10,395 Kg = 26.5 x 12.0 " / 305 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 4.8 ft / 1.4 m
   Roll period: 15.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.81
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.620 / 0.625
   Length to Beam Ratio: 6.63 : 1
   'Natural speed' for length: 23.02 kts
   Power going to wave formation at top speed: 38 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  23.00 ft / 7.01 m,  18.00 ft / 5.49 m
      - Forward deck:   20.00 %,  18.00 ft / 5.49 m,  16.50 ft / 5.03 m
      - Aft deck:   33.00 %,  16.50 ft / 5.03 m,  16.50 ft / 5.03 m
      - Quarter deck:   22.00 %,  16.50 ft / 5.03 m,  16.50 ft / 5.03 m
      - Average freeboard:      17.53 ft / 5.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79.9 %
      - Above water (accommodation/working, high = better): 125.2 %
   Waterplane Area: 31,594 Square feet or 2,935 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 157 lbs/sq ft or 766 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.60
      - 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

Below-decks miscellaneous weight includes provision for 4 18" submerged broadside torpedo tubes with 12 reload torpedoes.

Above-decks miscellaneous weight allows for a long-range wireless installation.

[Tanthalas]

The rules dont allow for MMB on AQY, its an either or proposistion (trust me I would know as I spend half my time coming up with ways around the rules that arnt exactly cheating).

[KWorld]

Well, that saves some tonnage.....

USS Connecticutt, USA Battleship laid down 1903 (Engine 1905)

Displacement:
   14,519 t light; 15,315 t standard; 16,380 t normal; 17,232 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (509.84 ft / 500.00 ft) x 78.00 ft x (24.50 / 25.55 ft)
   (155.40 m / 152.40 m) x 23.77 m  x (7.47 / 7.79 m)

Armament:
      6 - 12.00" / 305 mm 45.0 cal guns - 870.01lbs / 394.63kg shells, 80 per gun
     Breech loading guns in turret on barbette mounts, 1903 Model
     3 x Twin mounts on centreline ends, majority aft
      6 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 250 per gun
     Breech loading guns in deck and hoist mounts, 1903 Model
     3 x Twin mounts on side ends, majority forward
      3 raised mounts
      12 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1903 Model
     12 x Single mounts on sides, evenly spread
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 500 per gun
     Quick firing guns in casemate mounts, 1903 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 7,266 lbs / 3,296 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   265.00 ft / 80.77 m   13.00 ft / 3.96 m
   Ends:   5.00" / 127 mm   234.98 ft / 71.62 m   8.00 ft / 2.44 m
   Upper:   9.00" / 229 mm   265.00 ft / 80.77 m   8.00 ft / 2.44 m
     Main Belt covers 82 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm   6.00" / 152 mm      10.0" / 254 mm
   2nd:   10.0" / 254 mm   6.00" / 152 mm            -
   3rd:   6.00" / 152 mm         -         4.00" / 102 mm
   4th:   2.00" / 51 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.50" / 64 mm
   Forecastle: 2.50" / 64 mm  Quarter deck: 2.50" / 64 mm

   - Conning towers: Forward 14.00" / 356 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 14,131 ihp / 10,541 Kw = 18.00 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 1,918 tons (100% coal)

Complement:
   723 - 941

Cost:
   £1.436 million / $5.746 million

Distribution of weights at normal displacement:
   Armament: 1,355 tons, 8.3 %
      - Guns: 1,355 tons, 8.3 %
   Armour: 5,943 tons, 36.3 %
      - Belts: 3,121 tons, 19.1 %
      - Armament: 1,215 tons, 7.4 %
      - Armour Deck: 1,329 tons, 8.1 %
      - Conning Towers: 278 tons, 1.7 %
   Machinery: 2,048 tons, 12.5 %
   Hull, fittings & equipment: 5,133 tons, 31.3 %
   Fuel, ammunition & stores: 1,861 tons, 11.4 %
   Miscellaneous weights: 41 tons, 0.3 %
      - Hull below water: 16 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21,062 lbs / 9,554 Kg = 24.4 x 12.0 " / 305 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 4.9 ft / 1.5 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.59
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.605
   Length to Beam Ratio: 6.41 : 1
   'Natural speed' for length: 22.36 kts
   Power going to wave formation at top speed: 39 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  20.00 ft / 6.10 m,  16.00 ft / 4.88 m
      - Forward deck:   20.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Aft deck:   33.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Quarter deck:   22.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Average freeboard:      16.40 ft / 5.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 76.9 %
      - Above water (accommodation/working, high = better): 120.2 %
   Waterplane Area: 28,524 Square feet or 2,650 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 144 lbs/sq ft or 702 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.60
      - Overall: 1.01
   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

Below-decks miscellaneous weight includes provision for 4 18" submerged broadside torpedo tubes with 12 reload torpedoes.

Above-deck miscellaneous weight allows for a long-range wireless installation.

[Nobody]

The rules dont allow for MMB on AQY, its an either or proposistion (trust me I would know as I spend half my time coming up with ways around the rules that arnt exactly cheating).

What exactly do you mean by that? Especially the "MMB"?

[KWorld]

The rules dont allow for MMB on AQY, its an either or proposistion (trust me I would know as I spend half my time coming up with ways around the rules that arnt exactly cheating).

What exactly do you mean by that? Especially the "MMB"?

I expect he means the following:

BB/AC Architecture - Main battery in turrets
1880: Main guns in twin turrets, secondaries in casemate
1890: Mixed main armament or AQY with double turrets+casemates
1904: All-big-gun ship with wing turrets, superfiring turrets (restricted axial firing arcs), improved turret hydraulics, Torpedo Bulkheads
1906: Superfiring turrets (unrestricted firing arcs), triple turrets
1912: Quadruple turrets
1920:  No restriction (high or low) on caliber of turreted guns

Secondaries are 4-7" guns. 8-10" medium-caliber guns are not secondaries, but medium-caliber main guns


The "MMB" is a reference to the comment in the above about 8-10" guns being medium-caliber main guns, though he used a B vs a G (probably for battery).  The 1890 tech doesn't allow for a mixed main armament on AQY ships, you can have either a mixed main armament OR AQY, not both, which my design had.

[KWorld]

An earlier AXY stacked battleship:

USS Nebraska, USA Battleship laid down 1900

Displacement:
   14,819 t light; 15,754 t standard; 16,926 t normal; 17,864 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (509.84 ft / 500.00 ft) x 78.00 ft x (24.50 / 25.63 ft)
   (155.40 m / 152.40 m) x 23.77 m  x (7.47 / 7.81 m)

Armament:
      6 - 12.00" / 305 mm 40.0 cal guns - 870.01lbs / 394.63kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      6 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 250 per gun
     Breech loading guns in deck and hoist mounts, 1900 Model
     3 x Twin mounts on side ends, majority forward
      3 raised mounts
      12 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 180 per gun
     Breech loading guns in casemate mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 400 per gun
     Quick firing guns in casemate mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 7,266 lbs / 3,296 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   265.00 ft / 80.77 m   14.00 ft / 4.27 m
   Ends:   6.00" / 152 mm   234.98 ft / 71.62 m   8.00 ft / 2.44 m
   Upper:   8.00" / 203 mm   265.00 ft / 80.77 m   8.00 ft / 2.44 m
     Main Belt covers 82 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm   6.00" / 152 mm      10.0" / 254 mm
   2nd:   10.0" / 254 mm   6.00" / 152 mm            -
   3rd:   6.00" / 152 mm         -         4.00" / 102 mm
   4th:   2.00" / 51 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.50" / 64 mm
   Forecastle: 2.50" / 64 mm  Quarter deck: 2.50" / 64 mm

   - Conning towers: Forward 14.00" / 356 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 14,499 ihp / 10,816 Kw = 18.00 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 2,110 tons (100% coal)

Complement:
   741 - 964

Cost:
   £1.402 million / $5.607 million

Distribution of weights at normal displacement:
   Armament: 1,211 tons, 7.2 %
      - Guns: 1,211 tons, 7.2 %
   Armour: 6,097 tons, 36.0 %
      - Belts: 3,244 tons, 19.2 %
      - Armament: 1,215 tons, 7.2 %
      - Armour Deck: 1,354 tons, 8.0 %
      - Conning Towers: 284 tons, 1.7 %
   Machinery: 2,265 tons, 13.4 %
   Hull, fittings & equipment: 5,205 tons, 30.8 %
   Fuel, ammunition & stores: 2,107 tons, 12.4 %
   Miscellaneous weights: 41 tons, 0.2 %
      - Hull below water: 16 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     22,219 lbs / 10,078 Kg = 25.7 x 12.0 " / 305 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 5.1 ft / 1.6 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.57
   Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.620 / 0.626
   Length to Beam Ratio: 6.41 : 1
   'Natural speed' for length: 22.36 kts
   Power going to wave formation at top speed: 40 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  20.00 ft / 6.10 m,  16.00 ft / 4.88 m
      - Forward deck:   20.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Aft deck:   33.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Quarter deck:   22.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Average freeboard:      16.40 ft / 5.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 75.8 %
      - Above water (accommodation/working, high = better): 119.5 %
   Waterplane Area: 29,060 Square feet or 2,700 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 142 lbs/sq ft or 694 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.56
      - Overall: 1.01
   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

Below-decks miscellaneous weight includes provision for 4 18" submerged broadside torpedo tubes with 12 reload torpedoes.

Above-deck miscellaneous weight allows for a long-range wireless installation..

[KWorld]

An AXY armored cruiser, without the new stacked turrets.

USS Salt Lake City, United States Armored Cruiser laid down 1900

Displacement:
   12,394 t light; 12,977 t standard; 14,086 t normal; 14,973 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (555.00 ft / 555.00 ft) x 70.50 ft x (24.00 / 25.17 ft)
   (169.16 m / 169.16 m) x 21.49 m  x (7.32 / 7.67 m)

Armament:
      6 - 10.00" / 254 mm 45.0 cal guns - 510.00lbs / 231.33kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      12 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      8 hull mounts in casemates- Limited use in heavy seas
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 300 per gun
     Quick firing guns in deck mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 4,476 lbs / 2,030 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.00" / 152 mm   394.05 ft / 120.11 m   13.00 ft / 3.96 m
   Ends:   4.00" / 102 mm   160.93 ft / 49.05 m   8.00 ft / 2.44 m
   Upper:   4.00" / 102 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
     Main Belt covers 109 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6.00" / 152 mm   4.00" / 102 mm      6.00" / 152 mm
   3rd:   4.00" / 102 mm         -         4.00" / 102 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.00" / 51 mm
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 23,458 ihp / 17,499 Kw = 21.50 kts
   Range 6,250nm at 10.00 kts
   Bunker at max displacement = 1,996 tons (100% coal)

Complement:
   646 - 840

Cost:
   £1.311 million / $5.246 million

Distribution of weights at normal displacement:
   Armament: 967 tons, 6.9 %
      - Guns: 967 tons, 6.9 %
   Armour: 3,618 tons, 25.7 %
      - Belts: 1,885 tons, 13.4 %
      - Armament: 548 tons, 3.9 %
      - Armour Deck: 995 tons, 7.1 %
      - Conning Towers: 188 tons, 1.3 %
   Machinery: 3,665 tons, 26.0 %
   Hull, fittings & equipment: 4,103 tons, 29.1 %
   Fuel, ammunition & stores: 1,692 tons, 12.0 %
   Miscellaneous weights: 41 tons, 0.3 %
      - Hull below water: 16 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,909 lbs / 5,856 Kg = 25.8 x 10.0 " / 254 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 4.9 ft / 1.5 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.525 / 0.532
   Length to Beam Ratio: 7.87 : 1
   'Natural speed' for length: 23.56 kts
   Power going to wave formation at top speed: 41 %
   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 (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   17.00 %,  21.50 ft / 6.55 m,  17.00 ft / 5.18 m
      - Forward deck:   20.00 %,  17.00 ft / 5.18 m,  16.00 ft / 4.88 m
      - Aft deck:   51.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Quarter deck:   12.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Average freeboard:      16.58 ft / 5.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.5 %
      - Above water (accommodation/working, high = better): 127.0 %
   Waterplane Area: 26,677 Square feet or 2,478 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 118 lbs/sq ft or 574 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.28
      - Overall: 1.00
   Adequate 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

Below-decks miscellaneous weight accounts for 4 submerged broadside 18" 5m wet heater torpedo tubes and 12 reload torpedoes.

Above-decks miscellaneous weight allows for a long-range wireless installation.

[KWorld]

N-1, United States Net Tender/mine layer laid down 1900

Displacement:
   200 t light; 204 t standard; 218 t normal; 228 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (110.00 ft / 110.00 ft) x 20.00 ft x (6.00 / 6.24 ft)
   (33.53 m / 33.53 m) x 6.10 m  x (1.83 / 1.90 m)

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 165 ihp / 123 Kw = 10.00 kts
   Range 1,500nm at 8.00 kts
   Bunker at max displacement = 24 tons (100% coal)

Complement:
   27 - 36

Cost:
   £0.011 million / $0.044 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Machinery: 29 tons, 13.4 %
   Hull, fittings & equipment: 55 tons, 25.5 %
   Fuel, ammunition & stores: 18 tons, 8.2 %
   Miscellaneous weights: 115 tons, 52.8 %
      - Hull above water: 100 tons
      - On freeboard deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     281 lbs / 127 Kg = 2.6 x 6 " / 152 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.577 / 0.582
   Length to Beam Ratio: 5.50 : 1
   'Natural speed' for length: 10.49 kts
   Power going to wave formation at top speed: 47 %
   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 (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.00 ft / 2.44 m,  6.00 ft / 1.83 m
      - Forward deck:   15.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Aft deck:   50.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Quarter deck:   15.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Average freeboard:      6.16 ft / 1.88 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.9 %
      - Above water (accommodation/working, high = better): 66.7 %
   Waterplane Area: 1,575 Square feet or 146 Square metres
   Displacement factor (Displacement / loading): 125 %
   Structure weight / hull surface area: 23 lbs/sq ft or 114 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.64
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, rides out heavy weather easily

[Delta Force]

Why don't you make the mine warfare ship single shaft to save weight and simplify the design?

[Tanthalas]

*Seconds this question*

Why don't you make the mine warfare ship single shaft to save weight and simplify the design?

[KWorld]

Because I want them to be able to dock without needing a tug, and generally be able to maneuver at lower speeds.  A single-shafted ship is going to lose rudder authority, where a dual-shafted vessel can manuever with differential thrust.  Also, if I were desperate to save weight, I'd go to a complex reciprocating engine instead of the simple one I'm using.

[KWorld]

And a smallish collier for the USN.  Even though she's not huge by any means, she can still carry 4500 tons of coal, and she's equipped with cranes to unload the coal.  (And she only costs $ 0.16 to keep on active status per half-year.)

USS Hannibal, United States Collier laid down 1901 (Engine 1900)

Displacement:
   5,828 t light; 5,950 t standard; 6,109 t normal; 6,236 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (330.00 ft / 330.00 ft) x 55.00 ft x (19.00 / 19.34 ft)
   (100.58 m / 100.58 m) x 16.76 m  x (5.79 / 5.89 m)

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 506 ihp / 378 Kw = 8.00 kts
   Range 4,000nm at 6.00 kts
   Bunker at max displacement = 286 tons (100% coal)

Complement:
   345 - 449

Cost:
   £0.217 million / $0.866 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Machinery: 90 tons, 1.5 %
   Hull, fittings & equipment: 1,208 tons, 19.8 %
   Fuel, ammunition & stores: 281 tons, 4.6 %
   Miscellaneous weights: 4,530 tons, 74.2 %
      - Hull below water: 3,000 tons
      - Hull above water: 1,500 tons
      - On freeboard deck: 20 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,897 lbs / 3,129 Kg = 1,808.4 x 6 " / 152 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.52
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 95 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 1.91

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.620 / 0.622
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 18.17 kts
   Power going to wave formation at top speed: 16 %
   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 (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.00 ft / 6.10 m,  17.00 ft / 5.18 m
      - Forward deck:   30.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Aft deck:   35.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Quarter deck:   15.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
      - Average freeboard:      12.04 ft / 3.67 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 85.2 %
      - Above water (accommodation/working, high = better): 65.8 %
   Waterplane Area: 13,272 Square feet or 1,233 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 63 lbs/sq ft or 306 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.49
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, rides out heavy weather easily

[KWorld]

And a larger collier, capable of carrying up to 7500 tons of coal.

USS Hannibal, United States Collier laid down 1901 (Engine 1900)

Displacement:
   9,497 t light; 9,696 t standard; 9,924 t normal; 10,106 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (405.00 ft / 405.00 ft) x 55.00 ft x (24.75 / 25.14 ft)
   (123.44 m / 123.44 m) x 16.76 m  x (7.54 / 7.66 m)

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 690 ihp / 515 Kw = 8.00 kts
   Range 4,000nm at 6.00 kts
   Bunker at max displacement = 410 tons (100% coal)

Complement:
   496 - 646

Cost:
   £0.350 million / $1.398 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Machinery: 122 tons, 1.2 %
   Hull, fittings & equipment: 1,790 tons, 18.0 %
   Fuel, ammunition & stores: 426 tons, 4.3 %
   Miscellaneous weights: 7,585 tons, 76.4 %
      - Hull below water: 5,000 tons
      - Hull above water: 2,500 tons
      - On freeboard deck: 40 tons
      - Above deck: 45 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,195 lbs / 4,171 Kg = 681.1 x 6 " / 152 mm shells or 1.5 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 3.1 ft / 0.9 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.630 / 0.632
   Length to Beam Ratio: 7.36 : 1
   'Natural speed' for length: 20.12 kts
   Power going to wave formation at top speed: 12 %
   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 (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.00 ft / 6.10 m,  17.00 ft / 5.18 m
      - Forward deck:   30.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Aft deck:   35.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Quarter deck:   15.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
      - Average freeboard:      12.04 ft / 3.67 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 86.5 %
      - Above water (accommodation/working, high = better): 56.8 %
   Waterplane Area: 16,466 Square feet or 1,530 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 70 lbs/sq ft or 342 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.27
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, rides out heavy weather easily

All hull miscellaneous weight is for cargo, usually coal.

Cranes account for the on-deck miscellaneous weight and 20 tons of the above-deck miscellaneous weight.

A long-range wireless set is fitted, accounting for 25 tons of the above-decks miscellaneous weight.

[KWorld]

A quick design sketch of a heavy armored cruiser/fast battleship to match the French armored cruisers with their 274mm guns.  The USN lacks any guns between the 10"/45 and the 12"/40, so this design carries the 12"/40.

USS Minnesota, United States Battleship laid down 1900

Displacement:
   16,411 t light; 17,239 t standard; 18,566 t normal; 19,627 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (600.00 ft / 600.00 ft) x 76.00 ft x (25.00 / 26.15 ft)
   (182.88 m / 182.88 m) x 23.16 m  x (7.62 / 7.97 m)

Armament:
      6 - 12.00" / 305 mm 40.0 cal guns - 870.01lbs / 394.63kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      6 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      3 raised mounts
      8 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1900 Model
     8 x Single mounts on sides, evenly spread
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 300 per gun
     Quick firing guns in deck mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 6,846 lbs / 3,105 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   402.00 ft / 122.53 m   13.00 ft / 3.96 m
   Ends:   4.00" / 102 mm   197.98 ft / 60.34 m   8.00 ft / 2.44 m
   Upper:   6.00" / 152 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
     Main Belt covers 103 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 254 mm   6.00" / 152 mm      8.00" / 203 mm
   2nd:   8.00" / 203 mm   6.00" / 152 mm            -
   3rd:   4.00" / 102 mm         -         4.00" / 102 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.00" / 51 mm
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 27,635 ihp / 20,615 Kw = 21.50 kts
   Range 6,250nm at 10.00 kts
   Bunker at max displacement = 2,389 tons (100% coal)

Complement:
   794 - 1,033

Cost:
   £1.721 million / $6.883 million

Distribution of weights at normal displacement:
   Armament: 1,157 tons, 6.2 %
      - Guns: 1,157 tons, 6.2 %
   Armour: 5,212 tons, 28.1 %
      - Belts: 2,857 tons, 15.4 %
      - Armament: 919 tons, 4.9 %
      - Armour Deck: 1,210 tons, 6.5 %
      - Conning Towers: 227 tons, 1.2 %
   Machinery: 4,318 tons, 23.3 %
   Hull, fittings & equipment: 5,688 tons, 30.6 %
   Fuel, ammunition & stores: 2,154 tons, 11.6 %
   Miscellaneous weights: 37 tons, 0.2 %
      - Hull below water: 12 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     16,508 lbs / 7,488 Kg = 19.1 x 12.0 " / 305 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 4.7 ft / 1.4 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.52
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.570 / 0.576
   Length to Beam Ratio: 7.89 : 1
   'Natural speed' for length: 24.49 kts
   Power going to wave formation at top speed: 40 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   19.00 %,  19.00 ft / 5.79 m,  15.00 ft / 4.57 m
      - Forward deck:   40.00 %,  15.00 ft / 4.57 m,  14.00 ft / 4.27 m
      - Aft deck:   27.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Quarter deck:   14.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Average freeboard:      14.69 ft / 4.48 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.7 %
      - Above water (accommodation/working, high = better): 111.2 %
   Waterplane Area: 32,427 Square feet or 3,013 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 137 lbs/sq ft or 668 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.02
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Below-decks miscellaneous weight accounts for 4 submerged broadside 18" 5m wet heater torpedo tubes and 8 reload torpedoes.

Above-decks miscellaneous weight allows for a long-range wireless installation.

[Nobody]

I think its too early for secondaries in twins. Except of course for something like a 10" intermediate battery.