WesWorld

Summary

Trung Trac class Survey Ship - 1943
- Trung Trac (1943)

Tam Sat class Salvage Tug - 1943
- Tam Sat (1943)
- Hát Giang (1943)

Thich Anh Hung class Civil Support Ship - 1945
- Thich Anh Hung – (1945)

Long Dao class Coastal Depot Ship - 1946
- Long Dao – (1946)

Than Tien class Underway Replenishment Ship - 1947
- Than Tien (1947)
- Thien Kich (1948)

Trung Trac, Indochinese Coastal Surveying Vessel laid down 1943

Displacement:
138 t light; 142 t standard; 176 t normal; 203 t full load

Dimensions: Length overall / water x beam x draught
139.17 ft / 131.23 ft x 18.70 ft x 4.92 ft (normal load)
42.42 m / 40.00 m x 5.70 m x 1.50 m

Armament:
1 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1943 Model
Machine gun in deck mount
on centreline forward
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 3,000

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 266 shp / 198 Kw = 12.00 kts
Range 5,000nm at 12.00 kts
Bunker at max displacement = 62 tons

Complement:
23 - 31

Cost:
£0.038 million / $0.152 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 7 tons, 3.9 %
Hull, fittings & equipment: 91 tons, 51.8 %
Fuel, ammunition & stores: 38 tons, 21.6 %
Miscellaneous weights: 40 tons, 22.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
720 lbs / 327 Kg = 6,994.1 x 0.6 " / 15 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.5 ft / 0.1 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.510
Length to Beam Ratio: 7.02 : 1
'Natural speed' for length: 11.46 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 12.80 ft / 3.90 m
- Forecastle (20 %): 10.17 ft / 3.10 m
- Mid (50 %): 7.22 ft / 2.20 m
- Quarterdeck (15 %): 7.22 ft / 2.20 m
- Stern: 7.22 ft / 2.20 m
- Average freeboard: 8.46 ft / 2.58 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 38.9 %
- Above water (accommodation/working, high = better): 104.0 %
Waterplane Area: 1,589 Square feet or 148 Square metres
Displacement factor (Displacement / loading): 327 %
Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.12
- Longitudinal: 6.88
- Overall: 1.34
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
Not yet available. Nothing really fancy.

Ships in Class:
- Trung Trac (1943)

The Patrouille Navale has acquired a number of light craft for use in a Port Service Boat Squadron.

Quoted

Bateau de Service 8.6m (8.6m Utility Boat)
Displacement: 6 tonnes
Length: 8.6 m (28.2 ft) overall
Beam: 3.35 m (11 ft)
Draught: 0.85 m (2.8 ft) full load
Machinery: 1 V6 diesel engine, 165cv, driving one shaft
Speed: 16 knots
Range: 190km (118 miles)
Crew: 2 men
Capacity: 20 men or cargo

Bateau de Service 12.2m (12.2m Utility Boat)
Displacement: 10 tonnes
Length: 12.2 m (40 ft) overall
Beam: 3.5 m (11.5 ft)
Draught: 1 m (3.25 ft) full load
Machinery: 1 V6 diesel engine, 225cv, driving one shaft
Speed: 12 knots
Range: 338km (210 miles)
Crew: 3 men
Capacity: 3,300 kg (7,275lb) or 40 men

Bateau de Service 20m (20m Utility Boat)
Displacement: 30 tonnes
Length: 20 m (65.6 ft) overall
Beam: 5.2 m (17 ft)
Draught: 1.2 m (4 ft) full load
Machinery: 2 V6 diesel engines, 400cv, driving two shafts
Speed: 18 knots
Range: 780km (298 miles)
Crew: 6 men
Capacity: 4500 kg (9,900lb) cargo or 60 men

Patrouilleur de Port 15m (15m Harbor Patrol Boat)
Displacement: 17 tonnes
Length: 15 m (49.2 ft) overall
Beam: 3.8 m (12.4 ft)
Draught: 1.2 m (4 ft) full load
Machinery: 2 V6 diesel engines, 300cv, driving two shafts
Speed: 17.5 knots
Range: 338km (210 miles)
Crew: 4 men
Armamant: 1 x 6.5mm MG

Quantities:
Bateau de Service 8.6m: 2x boats outfitted for utility, 2x boats outfitted for personnel
Bateau de Service 12.2m: 2x boats outfitted for utility, 2x boats outfitted for personnel
Bateau de Service 20m: 2x boats outfitted for utility, 2x boats outfitted for personnel
Patrouilleur de Port 15m: 4x boats

Tam Sat (Cephee class), Indochinese Salvage Tug laid down 1940

Displacement:
1,484 t light; 1,534 t standard; 2,046 t normal; 2,456 t full load

Dimensions: Length overall / water x beam x draught
219.31 ft / 213.25 ft x 39.37 ft x 16.40 ft (normal load)
66.85 m / 65.00 m x 12.00 m x 5.00 m

Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1940 Model
Anti-aircraft gun in deck mount
on centreline forward
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1940 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 17 lbs / 8 kg
Shells per gun, main battery: 800

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 3,639 shp / 2,715 Kw = 16.50 kts
Range 12,000nm at 14.00 kts
Bunker at max displacement = 922 tons

Complement:
151 - 197

Cost:
£0.404 million / $1.617 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.1 %
Machinery: 97 tons, 4.8 %
Hull, fittings & equipment: 1,184 tons, 57.9 %
Fuel, ammunition & stores: 562 tons, 27.5 %
Miscellaneous weights: 200 tons, 9.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,844 lbs / 3,104 Kg = 531.7 x 3.0 " / 75 mm shells or 3.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.30

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.520
Length to Beam Ratio: 5.42 : 1
'Natural speed' for length: 14.60 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15.75 ft / 4.80 m
- Forecastle (20 %): 12.80 ft / 3.90 m
- Mid (50 %): 8.86 ft / 2.70 m
- Quarterdeck (15 %): 10.83 ft / 3.30 m
- Stern: 12.80 ft / 3.90 m
- Average freeboard: 11.26 ft / 3.43 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 28.9 %
- Above water (accommodation/working, high = better): 74.0 %
Waterplane Area: 5,698 Square feet or 529 Square metres
Displacement factor (Displacement / loading): 497 %
Structure weight / hull surface area: 127 lbs/sq ft or 622 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.31
- Longitudinal: 8.28
- Overall: 2.62
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Breakdown of Miscellaneous Weight:
- 30 tons salvage crane
- 75 tons towing equipment
- 15 tons ASW fit
- 20 tons high-capacity pumps
- 25 tons reserved for diving bell/sub rescue apparatus
- 35 tons subsidiary low-speed towing diesel

Ships in Class:
- Tam Sat (acquired 1943)
- Hát Giang (acquired 1943)

Thich Anh Hung class, Indochinese Civil Support Ship laid down 1945
Exported Filipino Cabo Bojeador-class Civil Support Ship

Displacement:
410 t light; 424 t standard; 686 t normal; 896 t full load

Dimensions:
Length overall / water x beam x draught
150.22 ft / 144.36 ft x 24.61 ft x 9.02 ft (normal load) [45.79 m / 44.00 m x 7.50 m x 2.75 m]

Armament:
1 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1945 Model Anti-aircraft gun in deck mount on centreline forward
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1945 Model Machine guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 1 lbs / 0 kg
Shells per gun, main battery: 300

Armour:
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm 0.39" / 10 mm -

Conning tower: 0.39" / 10 mm

Machinery:
Diesel Internal combustion motors, Geared drive, 2 shafts, 2,161 shp / 1,612 Kw = 16.00 kts
Range 10,000nm at 14.00 kts
Bunker at max displacement = 472 tons

Complement:
66 - 87

Cost:
£0.152 million / $0.609 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 1 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.1 %
Machinery: 55 tons, 8.0 %
Hull, fittings & equipment: 234 tons, 34.2 %
Fuel, ammunition & stores: 276 tons, 40.2 %
Miscellaneous weights: 120 tons, 17.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 2,094 lbs / 950 Kg = 4,392.9 x 1.0 " / 25 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.7 ft / 0.2 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised quarterdeck
Block coefficient: 0.749
Length to Beam Ratio: 5.87 : 1
'Natural speed' for length: 12.01 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 36
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 15.58 ft / 4.75 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (15 %): 15.58 ft / 4.75 m (13.12 ft / 4.00 m before break)
- Stern: 15.58 ft / 4.75 m
- Average freeboard: 14.55 ft / 4.44 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 46.2 %
- Above water (accommodation/working, high = better): 117.5 %
Waterplane Area: 2,973 Square feet or 276 Square metres
Displacement factor (Displacement / loading): 297 %
Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.84
- Longitudinal: 16.91
- Overall: 1.14
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
Accommodation for disaster response team - 30 tons
Expanded dispensary and medical facilities - 60 tons
Evaporators, generators and necessary shore connections - 30 tons

Ships in Class:
- Thich Anh Hung (Indochinese account) – Laid down 1 January 1945; Launched 20 February 1945; Completed 25 May 1945

Notes:
Ordered from and built in the Philippines.
Cargo simmed as bunkers - Actual radius 2,200 nm at 14 knots with BAM 109 tons.
Cargo represents 80 tons POL storage for distribution, 80 tons dry stores for distribution, 40 tons medical supplies for use or distribution, 20 tons fresh water in tanks with pumps

Long Dao-class, Indochinese Coastal Depot Ship laid down 1946
The Long Dao coastal depot ship was designed to serve as a support vessel for submarine chasers, motor torpedo boats, and other assorted light coastal combatants. The ship is not designed to serve as a permanent floating base, but rather as a mobile support ship.

Displacement:
765 t light; 794 t standard; 886 t normal; 959 t full load

Dimensions: Length overall / water x beam x draught
235.75 ft / 229.66 ft x 31.17 ft x 7.22 ft (normal load)
71.86 m / 70.00 m x 9.50 m x 2.20 m

Armament:
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread
8 - 0.91" / 23.0 mm guns (4x2 guns), 0.37lbs / 0.17kg shells, 1946 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 11 lbs / 5 kg
Shells per gun, main battery: 1,500

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.20" / 5 mm -
2nd: 0.59" / 15 mm 0.20" / 5 mm -

- Conning tower: 0.59" / 15 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 1,487 shp / 1,109 Kw = 15.00 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 165 tons

Complement:
80 - 105

Cost:
£0.235 million / $0.939 million

Distribution of weights at normal displacement:
Armament: 1 tons, 0.2 %
Armour: 3 tons, 0.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 2 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.1 %
Machinery: 37 tons, 4.2 %
Hull, fittings & equipment: 303 tons, 34.2 %
Fuel, ammunition & stores: 121 tons, 13.7 %
Miscellaneous weights: 420 tons, 47.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,916 lbs / 869 Kg = 980.9 x 1.6 " / 40 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.0 ft / 0.3 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.600
Length to Beam Ratio: 7.37 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.73 ft / 5.10 m
- Forecastle (23 %): 13.45 ft / 4.10 m
- Mid (45 %): 10.17 ft / 3.10 m
- Quarterdeck (15 %): 10.17 ft / 3.10 m
- Stern: 10.17 ft / 3.10 m
- Average freeboard: 11.57 ft / 3.53 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.4 %
- Above water (accommodation/working, high = better): 134.1 %
Waterplane Area: 5,235 Square feet or 486 Square metres
Displacement factor (Displacement / loading): 174 %
Structure weight / hull surface area: 37 lbs/sq ft or 181 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.23
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
- 2 tons for DRBN-1 navigational surface and air search radar
- 18 tons for high test crane and winch
- 100 tons for barracks (space for 50 men)
- 15 tons for water distilling plant
- 15 tons for air conditioning
- 120 tons for command spaces
- 50 tons for workshops
- 10 tons for consumable stores

Ships in Class:
- Long Dao: Laid down Q1/1946, completed Q4/1946.

Than Tien-class, Indochinese Underway Replenishment Oiler laid down 1947

Displacement:
2,497 t light; 2,634 t standard; 5,333 t normal; 7,492 t full load

Dimensions: Length overall / water x beam x draught
400.54 ft / 393.70 ft x 50.20 ft x 16.08 ft (normal load)
122.08 m / 120.00 m x 15.30 m x 4.90 m

Armament:
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.61lbs / 3.00kg shells, 1947 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
12 - 0.91" / 23.0 mm guns (6x2 guns), 0.37lbs / 0.17kg shells, 1947 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 31 lbs / 14 kg
Shells per gun, main battery: 1,500

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm -
2nd: 0.59" / 15 mm 0.39" / 10 mm -

- Conning tower: 0.98" / 25 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 1 shaft, 3,830 shp / 2,857 Kw = 15.00 kts
Range 36,000nm at 15.00 kts
Bunker at max displacement = 4,858 tons

Complement:
311 - 405

Cost:
£0.753 million / $3.011 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.1 %
Armour: 13 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.1 %
Machinery: 95 tons, 1.8 %
Hull, fittings & equipment: 1,387 tons, 26.0 %
Fuel, ammunition & stores: 2,836 tons, 53.2 %
Miscellaneous weights: 1,000 tons, 18.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,229 lbs / 9,629 Kg = 3,757.0 x 2.2 " / 57 mm shells or 5.3 torpedoes
Stability (Unstable if below 1.00): 1.41
Metacentric height 3.2 ft / 1.0 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.588
Length to Beam Ratio: 7.84 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 2.50 ft / 0.76 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m (12.47 ft / 3.80 m aft of break)
- Mid (50 %): 12.47 ft / 3.80 m
- Quarterdeck (20 %): 19.69 ft / 6.00 m (12.47 ft / 3.80 m before break)
- Stern: 19.69 ft / 6.00 m
- Average freeboard: 15.75 ft / 4.80 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 28.8 %
- Above water (accommodation/working, high = better): 106.5 %
Waterplane Area: 13,945 Square feet or 1,296 Square metres
Displacement factor (Displacement / loading): 434 %
Structure weight / hull surface area: 64 lbs/sq ft or 311 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.44
- Overall: 1.03
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
- 5t for Navigational Radar
- 995t for Naval Stores

Ships in Class:
- Than Tien: laid down 1/1/1947, completed 10/21/1947.
- Thien Kich: laid down 1/1/1948, completed 10/21/1948.