Here's a shallow-draft little thing that might get a couple of platoons of troops close to the beach, and give them a bit of fire support while its there. Is this too much displacement for about 80 troops?
Krokodil, Russia Large Amphibious assault ship laid down 1926
Displacement:
467 t light; 481 t standard; 518 t normal; 547 t full load
Dimensions: Length overall / water x beam x draught
196.85 ft / 196.85 ft x 31.17 ft x 3.94 ft (normal load)
60.00 m / 60.00 m x 9.50 m x 1.20 m
Armament:
1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1926 Model
Breech loading gun in deck mount
on centreline forward
6 - 1.46" / 37.0 mm guns (3x2 guns), 1.55lbs / 0.70kg shells, 1926 Model
Breech loading guns in deck mounts
on centreline, evenly spread, all raised mounts
12 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1926 Model
Breech loading guns in casemate mounts
on side, evenly spread, 4 raised mounts
8 guns in hull casemates - Limited use in any sea
Weight of broadside 40 lbs / 18 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.98" / 25 mm 196.85 ft / 60.00 m 6.56 ft / 2.00 m
Ends: Unarmoured
Upper: 0.98" / 25 mm 131.23 ft / 40.00 m 4.27 ft / 1.30 m
Main Belt covers 154 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm - -
2nd: 0.98" / 25 mm - -
3rd: 0.98" / 25 mm - -
- Armour deck: 0.39" / 10 mm, Conning tower: 1.18" / 30 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,015 shp / 757 Kw = 14.00 kts
Range 2,000nm at 12.00 kts (Bunkerage = 66 tons)
Complement:
53 - 70
Cost:
£0.087 million / $0.347 million
Distribution of weights at normal displacement:
Armament: 5 tons, 1.0 %
Armour: 117 tons, 22.6 %
- Belts: 71 tons, 13.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 1.2 %
- Armour Deck: 37 tons, 7.2 %
- Conning Tower: 2 tons, 0.3 %
Machinery: 32 tons, 6.3 %
Hull, fittings & equipment: 203 tons, 39.2 %
Fuel, ammunition & stores: 51 tons, 9.8 %
Miscellaneous weights: 110 tons, 21.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,670 lbs / 757 Kg = 54.7 x 3.9 " / 100 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 1.4 ft / 0.4 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.750
Length to Beam Ratio: 6.32 : 1
'Natural speed' for length: 14.03 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 6.96 ft / 2.12 m
- Forecastle (20 %): 6.96 ft / 2.12 m
- Mid (50 %): 6.96 ft / 2.12 m
- Quarterdeck (15 %): 6.96 ft / 2.12 m
- Stern: 6.96 ft / 2.12 m
- Average freeboard: 6.96 ft / 2.12 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.1 %
- Above water (accommodation/working, high = better): 128.4 %
Waterplane Area: 5,139 Square feet or 477 Square metres
Displacement factor (Displacement / loading): 156 %
Structure weight / hull surface area: 33 lbs/sq ft or 161 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform