Nanning - Class
Auxiliary Landing Ship
as laid down
Displacement:
1.999 t light; 2.077 t standard; 2.712 t normal; 3.221 t full load
Dimensions:
Length overall / water x beam x draught
367,45 ft / 367,45 ft x 39,37 ft x 13,12 ft (normal load)
112,00 m / 112,00 m x 12,00 m x 4,00 m
Armament:
4 - 4,13" / 105 mm guns (2x2 guns), 35,32lbs / 16,02kg shells, 1922 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 3,46" / 88,0 mm guns (3 mounts), 20,79lbs / 9,43kg shells, 1922 Model
Breech loading guns in deck mounts
on side, all amidships, all raised mounts - superfiring
8 - 1,57" / 40,0 mm guns (2x4 guns), 1,95lbs / 0,89kg shells, 1922 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1922 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 243 lbs / 110 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,97" / 50 mm 147,64 ft / 45,00 m 7,51 ft / 2,29 m
Ends: Unarmoured
Main Belt covers 62% of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,38" / 35 mm - -
2nd: 0,98" / 25 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 14.983 shp / 11.177 Kw = 24,20 kts
Range 10.000nm at 15,00 kts
Bunker at max displacement = 1.144 tons
Complement:
187 - 244
Cost:
£0,454 million / $1,818 million
Distribution of weights at normal displacement:
Armament: 30 tons, 1,1%
Armour: 118 tons, 4,3%
- Belts: 100 tons, 3,7%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 18 tons, 0,7%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 508 tons, 18,7%
Hull, fittings & equipment: 943 tons, 34,8%
Fuel, ammunition & stores: 713 tons, 26,3%
Miscellaneous weights: 400 tons, 14,7%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4.023 lbs / 1.825 Kg = 113,9 x 4,1 " / 105 mm shells or 1,1 torpedoes
Stability (Unstable if below 1.00): 1,17
Metacentric height 1,7 ft / 0,5 m
Roll period: 12,8 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,20
Seaboat quality (Average = 1.00): 1,41
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,500
Length to Beam Ratio: 9,33 : 1
'Natural speed' for length: 19,17 kts
Power going to wave formation at top speed: 54 %
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 (% = measuring location as a percentage of overall length):
- Stem: 21,10 ft / 6,43 m
- Forecastle (20%): 13,42 ft / 4,09 m
- Mid (50%): 13,42 ft / 4,09 m
- Quarterdeck (15%): 13,42 ft / 4,09 m
- Stern: 13,42 ft / 4,09 m
- Average freeboard: 14,03 ft / 4,28 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86,2%
- Above water (accommodation/working, high = better): 131,7%
Waterplane Area: 9.639 Square feet or 895 Square metres
Displacement factor (Displacement / loading): 153%
Structure weight / hull surface area: 58 lbs/sq ft or 286 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,94
- Longitudinal: 1,69
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Comments:
The vessel can carry up to 6 floatplanes of post-WW1 vintage.
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after rebuilt:
Displacement:
2.082 t light; 2.160 t standard; 2.676 t normal; 3.089 t full load
Dimensions:
Length overall / water x beam x draught
367,45 ft / 362,53 ft x 39,37 ft x 13,12 ft (normal load)
112,00 m / 110,50 m x 12,00 m x 4,00 m
Armament:
4 - 4,13" / 105 mm guns (2x2 guns), 35,32lbs / 16,02kg shells, 1922 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
8 - 1,57" / 40,0 mm guns (2x4 guns), 1,95lbs / 0,89kg shells, 1922 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
14 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1922 Model
Machine guns in deck mounts
on side, evenly spread, 5 raised mounts
Weight of broadside 160 lbs / 73 kg
Shells per gun, main battery: 250
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,38" / 35 mm 229,66 ft / 70,00 m 9,84 ft / 3,00 m
Ends: Unarmoured
Main Belt covers 97% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,38" / 35 mm 0,98" / 25 mm -
2nd: 0,59" / 15 mm - -
3rd: 0,39" / 10 mm - -
- Conning tower: 1,18" / 30 mm
Machinery:
Oil fired boilers, steam turbines,
Hydraulic drive, 2 shafts, 14.964 shp / 11.163 Kw = 24,20 kts
Range 10.000nm at 15,00 kts
Bunker at max displacement = 929 tons
Complement:
185 - 241
Cost:
£0,392 million / $1,569 million
Distribution of weights at normal displacement:
Armament: 20 tons, 0,7%
Armour: 150 tons, 5,6%
- Belts: 131 tons, 4,9%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 14 tons, 0,5%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 5 tons, 0,2%
Machinery: 386 tons, 14,4%
Hull, fittings & equipment: 826 tons, 30,9%
Fuel, ammunition & stores: 594 tons, 22,2%
Miscellaneous weights: 700 tons, 26,2%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3.055 lbs / 1.385 Kg = 86,5 x 4,1 " / 105 mm shells or 1,0 torpedoes
Stability (Unstable if below 1.00): 1,01
Metacentric height 1,3 ft / 0,4 m
Roll period: 14,7 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0,11
Seaboat quality (Average = 1.00): 1,22
Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0,500
Length to Beam Ratio: 9,21 : 1
'Natural speed' for length: 19,04 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 0,00 degrees
Stern overhang: 4,92 ft / 1,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20,34 ft / 6,20 m
- Forecastle (20%): 16,40 ft / 5,00 m (8,53 ft / 2,60 m aft of break)
- Mid (50%): 8,53 ft / 2,60 m
- Quarterdeck (35%): 16,40 ft / 5,00 m (8,53 ft / 2,60 m before break)
- Stern: 16,40 ft / 5,00 m
- Average freeboard: 13,18 ft / 4,02 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 82,1%
- Above water (accommodation/working, high = better): 83,5%
Waterplane Area: 9.510 Square feet or 883 Square metres
Displacement factor (Displacement / loading): 150%
Structure weight / hull surface area: 54 lbs/sq ft or 263 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,97
- Longitudinal: 1,36
- Overall: 1,01
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily
Breakdown of Miscellaneous Weight:
- 200 tons for 2x LVI
- 500 tons of supplies
or
- 200 tons for 2x LVI
- 500 tons of tanks and vehicles
or
- 200 tons for 2x LVI
- 250 troops over short distances
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Ships in Class:
HICMS Nanchang; laid down 1922, rebuilt 1942
HICMS Nanning; laid down 1922, rebuilt 1942