The successor to the Iaculum Class, the Marathona Class improve on the available firepower greatly while also being incredibly fast.
QuoteMarathona, Roman Imperial Republic Cruiser laid down 1908
Displacement:
3,000 t light; 3,109 t standard; 3,292 t normal; 3,438 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(423.22 ft / 410.11 ft) x 42.65 ft x (13.94 / 14.39 ft)
(129.00 m / 125.00 m) x 13.00 m x (4.25 / 4.39 m)
Armament:
4 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
Breech loading guns in deck and hoist mounts, 1902 Model
4 x Single mounts on centreline ends, evenly spread
1 raised mount aft - superfiring
2 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
Quick firing guns in deck mounts, 1902 Model
2 x Single mounts on sides, forward deck aft
Weight of broadside 370 lbs / 168 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.39" / 10 mm 0.79" / 20 mm
2nd: 0.59" / 15 mm - -
- Protected deck - single deck:
For and Aft decks: 0.59" / 15 mm
Forecastle: 0.39" / 10 mm Quarter deck: 0.39" / 10 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 34,000 shp / 25,364 Kw = 29.21 kts
Range 3,500nm at 10.00 kts
Bunker at max displacement = 329 tons
Complement:
216 - 282
Cost:
£0.368 million / $1.474 million
Distribution of weights at normal displacement:
Armament: 111 tons, 3.4 %
- Guns: 111 tons, 3.4 %
Armour: 133 tons, 4.1 %
- Armament: 16 tons, 0.5 %
- Armour Deck: 117 tons, 3.6 %
Machinery: 1,604 tons, 48.7 %
Hull, fittings & equipment: 1,071 tons, 32.5 %
Fuel, ammunition & stores: 292 tons, 8.9 %
Miscellaneous weights: 80 tons, 2.4 %
- Hull below water: 5 tons
- Hull above water: 10 tons
- On freeboard deck: 50 tons
- Above deck: 15 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,424 lbs / 646 Kg = 17.0 x 5.5 " / 140 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.38
Metacentric height 2.5 ft / 0.8 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.472 / 0.478
Length to Beam Ratio: 9.62 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 5.05 ft / 1.54 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 22.15 ft / 6.75 m, 22.15 ft / 6.75 m
- Forward deck: 20.00 %, 22.15 ft / 6.75 m, 22.15 ft / 6.75 m
- Aft deck: 45.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Quarter deck: 15.00 %, 9.84 ft / 3.00 m, 9.84 ft / 3.00 m
- Average freeboard: 14.76 ft / 4.50 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 169.1 %
- Above water (accommodation/working, high = better): 136.7 %
Waterplane Area: 11,371 Square feet or 1,056 Square metres
Displacement factor (Displacement / loading): 82 %
Structure weight / hull surface area: 61 lbs/sq ft or 296 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 1.39
- Overall: 0.90
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (10t)
----10t Short-Range Wireless
--On Deck (50t)
----24t 6x450mm Torpedos (45 Pattern B) [Two Tripple tube mounts per side]
----25t Long-Range Wireless
----1t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights