Lake Mk2

[TacCovert4]

HMS Havasu
HMS Navajo


Lake-class, Aztec Frigate laid down 1928

Displacement:
   11,872 t light; 12,479 t standard; 13,866 t normal; 14,975 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (647.23 ft / 639.76 ft) x 70.54 ft x (19.91 / 21.16 ft)
   (197.27 m / 195.00 m) x 21.50 m  x (6.07 / 6.45 m)

Armament:
      12 - 7.09" / 180 mm 50.0 cal guns - 188.39lbs / 85.45kg shells, 200 per gun
     Quick firing guns in turret on barbette mounts, 1928 Model
     4 x 3-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      16 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck mounts, 1928 Model
     8 x Twin mounts on sides, evenly spread
      6 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1928 Model
     6 x Single mounts on sides, evenly spread
      4 raised mounts
      20 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1928 Model
     10 x Single mounts on sides, evenly spread
      Weight of broadside 2,861 lbs / 1,298 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.53" / 115 mm   439.50 ft / 133.96 m   13.12 ft / 4.00 m
   Ends:   1.97" / 50 mm   206.79 ft / 63.03 m   9.84 ft / 3.00 m
     Main Belt covers 106 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   439.50 ft / 133.96 m   19.69 ft / 6.00 m
   Beam between torpedo bulkheads 55.77 ft / 17.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.12" / 130 mm   2.99" / 76 mm      4.53" / 115 mm
   2nd:   2.36" / 60 mm   1.38" / 35 mm            -
   3rd:   0.98" / 25 mm         -               -
   4th:   0.98" / 25 mm         -         0.98" / 25 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.06" / 27 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 3.15" / 80 mm, Aft 3.15" / 80 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 80,128 shp / 59,775 Kw = 30.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 2,496 tons

Complement:
   638 - 830

Cost:
   £3.954 million / $15.816 million

Distribution of weights at normal displacement:
   Armament: 818 tons, 5.9 %
      - Guns: 818 tons, 5.9 %
   Armour: 3,534 tons, 25.5 %
      - Belts: 1,223 tons, 8.8 %
      - Torpedo bulkhead: 378 tons, 2.7 %
      - Armament: 588 tons, 4.2 %
      - Armour Deck: 1,267 tons, 9.1 %
      - Conning Towers: 78 tons, 0.6 %
   Machinery: 2,495 tons, 18.0 %
   Hull, fittings & equipment: 4,815 tons, 34.7 %
   Fuel, ammunition & stores: 1,993 tons, 14.4 %
   Miscellaneous weights: 210 tons, 1.5 %
      - Hull above water: 34 tons
      - On freeboard deck: 92 tons
      - Above deck: 84 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,307 lbs / 9,211 Kg = 114.1 x 7.1 " / 180 mm shells or 3.3 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 3.5 ft / 1.1 m
   Roll period: 15.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.540 / 0.549
   Length to Beam Ratio: 9.07 : 1
   'Natural speed' for length: 25.29 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18.00 %,  20.51 ft / 6.25 m,  20.51 ft / 6.25 m
      - Forward deck:   30.00 %,  20.51 ft / 6.25 m,  18.04 ft / 5.50 m
      - Aft deck:   38.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Quarter deck:   14.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Average freeboard:      18.86 ft / 5.75 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.9 %
      - Above water (accommodation/working, high = better): 173.1 %
   Waterplane Area: 31,201 Square feet or 2,899 Square metres
   Displacement factor (Displacement / loading): 123 %
   Structure weight / hull surface area: 117 lbs/sq ft or 573 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.00
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


32t - 2 x 4 x 21in HW TT on sides aft
60t - 2 x Catapult and 2 x Armed floatplane

25t - LR Wireless
25t - NF Devices
68t - 1918 FC