Argonauta Class Armored Cruiser

[snip]

The last pre-ABG (and last armored cruiser prior to 1910) Armored Cruiser, the Argonauta was almost immediately overshadowed by the new concept of Battlecruisers.

One Ship:
--IRS Argonauta

Argonauta, Imperial Roman Republic Armored Cruiser laid down 1905

Displacement:
   15,000 t light; 15,627 t standard; 16,834 t normal; 17,799 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (524.93 ft / 524.93 ft) x 80.38 ft x (26.25 / 27.41 ft)
   (160.00 m / 160.00 m) x 24.50 m  x (8.00 / 8.36 m)

Armament:
      12 - 8.27" / 210 mm 45.0 cal guns - 242.51lbs / 110.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     2 x Twin mounts on centreline ends, evenly spread
     4 x Twin mounts on sides, evenly spread
      10 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1902 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      16 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Quick firing guns in deck mounts, 1902 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      Weight of broadside 3,982 lbs / 1,806 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   370.60 ft / 112.96 m   18.04 ft / 5.50 m
   Ends:   2.76" / 70 mm   154.30 ft / 47.03 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   370.60 ft / 112.96 m   9.02 ft / 2.75 m
     Main Belt covers 109 % of normal length

   - Hull void:
      0.59" / 15 mm   369.29 ft / 112.56 m   18.04 ft / 5.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.09" / 180 mm   4.33" / 110 mm      7.09" / 180 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 1.18" / 30 mm
   Forecastle: 0.39" / 10 mm  Quarter deck: 0.39" / 10 mm

   - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, reciprocating cruising steam engines and steam turbines
   Direct drive, 3 shafts, 43,000 ihp / 32,078 Kw = 24.24 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,172 tons (90% coal)

Complement:
   738 - 960

Cost:
   £1.535 million / $6.141 million

Distribution of weights at normal displacement:
   Armament: 981 tons, 5.8 %
      - Guns: 981 tons, 5.8 %
   Armour: 4,595 tons, 27.3 %
      - Belts: 2,726 tons, 16.2 %
      - Void: 146 tons, 0.9 %
      - Armament: 1,038 tons, 6.2 %
      - Armour Deck: 574 tons, 3.4 %
      - Conning Tower: 111 tons, 0.7 %
   Machinery: 4,505 tons, 26.8 %
   Hull, fittings & equipment: 4,619 tons, 27.4 %
   Fuel, ammunition & stores: 1,834 tons, 10.9 %
   Miscellaneous weights: 300 tons, 1.8 %
      - Hull below water: 25 tons
      - Hull above water: 125 tons
      - On freeboard deck: 125 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,881 lbs / 7,204 Kg = 56.2 x 8.3 " / 210 mm shells or 1.8 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 6.0 ft / 1.8 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.532 / 0.539
   Length to Beam Ratio: 6.53 : 1
   'Natural speed' for length: 22.91 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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:   14.70 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   39.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   31.60 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   14.70 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.54 ft / 5.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.6 %
      - Above water (accommodation/working, high = better): 141.0 %
   Waterplane Area: 28,956 Square feet or 2,690 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 124 lbs/sq ft or 604 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.53
      - Overall: 1.00
   Adequate 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

Misc Distribution
--Below Water (25t)
----20t 12x450mm Torpedos (45 Pattern A)
----2t Additional Torpedo Handing Equipment
----3t Additional Pumps
--Above Water (125t)
----40t Flag Facilities
----20t Improved Officer Accommodations
----20t Improved Crew Accommodations
----30t Additional Troop Compliment
----10t Short Range Wireless
----5t Construction Reserve
--On Deck (125t)
----40t Flag Facilities
----20t Admiralty Accommodations
----15t Additional Ventilation
----10t Improved Officer Accommodations
----15t Improved Crew Accommodations
----25t Long-Range Wireless
--Above Deck (25t)
----15t Improved Aquisition Structures
----5t Additional Searchlights
----5t Improved Signaling Equipment

[snip]

In 1914H1 the Augonauta was refit with Fire Control.

Argonauta, Imperial Roman Republic Armored Cruiser laid down 1905

Displacement:
   15,000 t light; 15,627 t standard; 16,834 t normal; 17,799 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (524.93 ft / 524.93 ft) x 80.38 ft x (26.25 / 27.41 ft)
   (160.00 m / 160.00 m) x 24.50 m  x (8.00 / 8.36 m)

Armament:
      12 - 8.27" / 210 mm 45.0 cal guns - 242.51lbs / 110.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     2 x Twin mounts on centreline ends, evenly spread
     4 x Twin mounts on sides, evenly spread
      10 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1902 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      16 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Quick firing guns in deck mounts, 1902 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      Weight of broadside 3,982 lbs / 1,806 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   370.60 ft / 112.96 m   18.04 ft / 5.50 m
   Ends:   2.76" / 70 mm   154.30 ft / 47.03 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   370.60 ft / 112.96 m   9.02 ft / 2.75 m
     Main Belt covers 109 % of normal length

   - Hull void:
      0.59" / 15 mm   369.29 ft / 112.56 m   18.04 ft / 5.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.09" / 180 mm   4.33" / 110 mm      7.09" / 180 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 1.18" / 30 mm
   Forecastle: 0.39" / 10 mm  Quarter deck: 0.39" / 10 mm

   - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, reciprocating cruising steam engines and steam turbines
   Direct drive, 3 shafts, 43,000 ihp / 32,078 Kw = 24.24 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,172 tons (90% coal)

Complement:
   738 - 960

Cost:
   £1.535 million / $6.141 million

Distribution of weights at normal displacement:
   Armament: 981 tons, 5.8 %
      - Guns: 981 tons, 5.8 %
   Armour: 4,595 tons, 27.3 %
      - Belts: 2,726 tons, 16.2 %
      - Void: 146 tons, 0.9 %
      - Armament: 1,038 tons, 6.2 %
      - Armour Deck: 574 tons, 3.4 %
      - Conning Tower: 111 tons, 0.7 %
   Machinery: 4,505 tons, 26.8 %
   Hull, fittings & equipment: 4,619 tons, 27.4 %
   Fuel, ammunition & stores: 1,834 tons, 10.9 %
   Miscellaneous weights: 300 tons, 1.8 %
      - Hull below water: 25 tons
      - Hull above water: 125 tons
      - On freeboard deck: 125 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,881 lbs / 7,204 Kg = 56.2 x 8.3 " / 210 mm shells or 1.8 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 6.0 ft / 1.8 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.532 / 0.539
   Length to Beam Ratio: 6.53 : 1
   'Natural speed' for length: 22.91 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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:   14.70 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Forward deck:   39.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   31.60 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   14.70 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.54 ft / 5.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.6 %
      - Above water (accommodation/working, high = better): 141.0 %
   Waterplane Area: 28,956 Square feet or 2,690 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 124 lbs/sq ft or 604 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.53
      - Overall: 1.00
   Adequate 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

Misc Distribution
--Below Water (25t)
----20t 12x450mm Torpedos (45 Pattern A)
----2t Additional Torpedo Handing Equipment
----3t Additional Pumps
--Above Water (125t)
----20t Improved Officer Accommodations
----20t Improved Crew Accommodations
----70t 1912 Fire Control
----10t Short Range Wireless
----5t Construction Reserve
--On Deck (125t)
----40t Flag Facilities
----30t 1912 Fire Control
----15t Additional Ventilation
----10t Improved Officer Accommodations
----5t Improved Crew Accommodations
----25t Long-Range Wireless
--Above Deck (25t)
----15t Improved Aquisition Structures
----5t Additional Searchlights
----5t Improved Signaling Equipment

[snip]

By the end of 1923H1, Argonauta was updated to 1918 Fire Control.