WesWorld

Well, let's start this off with the biggest warship of the year.

This is the former battleship Samanjir, which was halted when about 50% complete. Some OOC notes in the Satsuma board indicate this was planned to be a carrier conversion, so I'm following through with it.

Air group would be 84 AC, plus another 400 t or so for electronics and other goodies.

The existing hull will require a 50% rebuild, then around 14,000 t to complete. Since I'm doing that level of work, I've updated the machinery and underwater protection.


Bagh Nakh, Enter country Enter ship type laid down 1940 (Engine 1942)

Displacement:
27,334 t light; 28,180 t standard; 31,434 t normal; 34,038 t full load

Dimensions: Length overall / water x beam x draught
751.55 ft / 721.78 ft x 91.86 ft x 27.89 ft (normal load)
229.07 m / 220.00 m x 28.00 m x 8.50 m

Armament:
12 - 4.92" / 125 mm guns in single mounts, 59.59lbs / 27.03kg shells, 1940 Model
Breech loading guns in deck mounts with hoists
on side, evenly spread
48 - 2.24" / 57.0 mm guns (24x2 guns), 5.65lbs / 2.56kg shells, 1940 Model
Dual purpose guns in deck mounts
on side, evenly spread
32 - 0.59" / 15.0 mm guns (8x4 guns), 0.10lbs / 0.05kg shells, 1940 Model
Dual purpose guns in deck mounts
on side, evenly spread
Weight of broadside 989 lbs / 449 kg
Shells per gun, main battery: 350

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 469.16 ft / 143.00 m 16.01 ft / 4.88 m
Ends: Unarmoured
Upper: 0.98" / 25 mm 469.16 ft / 143.00 m 18.04 ft / 5.50 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead:
2.95" / 75 mm 469.16 ft / 143.00 m 26.25 ft / 8.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

- Armour deck: 3.54" / 90 mm, Conning tower: 3.94" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 147,454 shp / 110,000 Kw = 32.03 kts
Range 15,000nm at 15.00 kts (Bunkerage = 5,858 tons)

Complement:
1,179 - 1,534

Cost:
£9.599 million / $38.397 million

Distribution of weights at normal displacement:
Armament: 124 tons, 0.4 %
Armour: 6,446 tons, 20.5 %
- Belts: 1,622 tons, 5.2 %
- Torpedo bulkhead: 1,345 tons, 4.3 %
- Armament: 97 tons, 0.3 %
- Armour Deck: 3,297 tons, 10.5 %
- Conning Tower: 84 tons, 0.3 %
Machinery: 3,852 tons, 12.3 %
Hull, fittings & equipment: 9,343 tons, 29.7 %
Fuel, ammunition & stores: 4,100 tons, 13.0 %
Miscellaneous weights: 7,569 tons, 24.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,494 lbs / 19,728 Kg = 729.8 x 4.9 " / 125 mm shells or 5.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 5.3 ft / 1.6 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.52

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.595
Length to Beam Ratio: 7.86 : 1
'Natural speed' for length: 30.93 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 16.40 ft / 5.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 49.87 ft / 15.20 m
- Forecastle (20 %): 30.18 ft / 9.20 m
- Mid (50 %): 30.18 ft / 9.20 m
- Quarterdeck (15 %): 30.18 ft / 9.20 m
- Stern: 30.18 ft / 9.20 m
- Average freeboard: 31.76 ft / 9.68 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 89.8 %
- Above water (accommodation/working, high = better): 245.3 %
Waterplane Area: 50,301 Square feet or 4,673 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 122 lbs/sq ft or 596 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.78
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

After having a candid look at its three oilers, Bharat reckons it's time to get some newer, better, larger replacements.

Two Minicoy-class oilers were be refitted into service in 1942. The first of two half-sisters, with some cargo capacity for stores replenishmet, will also be laid down.


Minicoy, Bharati oiler laid down 1935 (refitted to service 1942)

Displacement:
5,224 t light; 5,594 t standard; 17,163 t normal; 26,418 t full load

Dimensions: Length overall / water x beam x draught
470.28 ft / 459.32 ft x 88.58 ft x 24.61 ft (normal load)
143.34 m / 140.00 m x 27.00 m x 7.50 m

Armament:
2 - 4.92" / 125 mm guns in single mounts, 59.59lbs / 27.03kg shells, 1935 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, all amidships
8 - 0.59" / 15.0 mm guns (2x4 guns), 0.10lbs / 0.05kg shells, 1935 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 130 lbs / 59 kg
Shells per gun, main battery: 350

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 13,405 shp / 10,000 Kw = 17.42 kts
Range 68,700nm at 15.00 kts (Bunkerage = 20,823 tons)

Complement:
749 - 974

Cost:
£1.272 million / $5.088 million

Distribution of weights at normal displacement:
Armament: 16 tons, 0.1 %
Machinery: 381 tons, 2.2 %
Hull, fittings & equipment: 3,809 tons, 22.2 %
Fuel, ammunition & stores: 11,939 tons, 69.6 %
Miscellaneous weights: 1,018 tons, 5.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
141,664 lbs / 64,258 Kg = 2,377.2 x 4.9 " / 125 mm shells or 19.6 torpedoes
Stability (Unstable if below 1.00): 2.32
Metacentric height 15.1 ft / 4.6 m
Roll period: 9.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, rise aft of midbreak, low quarterdeck
Block coefficient: 0.600
Length to Beam Ratio: 5.19 : 1
'Natural speed' for length: 21.43 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.93 ft / 7.60 m
- Forecastle (20 %): 21.00 ft / 6.40 m (13.12 ft / 4.00 m aft of break)
- Mid (60 %): 13.12 ft / 4.00 m (21.00 ft / 6.40 m aft of break)
- Quarterdeck (20 %): 13.12 ft / 4.00 m (21.00 ft / 6.40 m before break)
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 16.59 ft / 5.06 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 16.3 %
- Above water (accommodation/working, high = better): 119.2 %
Waterplane Area: 29,758 Square feet or 2,765 Square metres
Displacement factor (Displacement / loading): 899 %
Structure weight / hull surface area: 96 lbs/sq ft or 470 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.52
- Overall: 1.00
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

The four Agra-class cruisers were considered solid, capable vessels for their time, and can be again for another fifteen years with some investment of resources. Agra and Dhaka entered drydock for a 50% refit in 1941. Surat and Pune will undergo similar work in 1942.

The ships are being re-engined, but the weight-savings are being put towards a heavier DP battery, increased miscellaneous weight for sensors and future growth, and to provide a greater belt height than the default old-school Springstyle report allowed for.

Here's the re-do:

Enter ship name, Enter country Enter ship type laid down 1926 (Engine 1941)

Displacement:
6,970 t light; 7,388 t standard; 8,086 t normal; 8,644 t full load

Dimensions: Length overall / water x beam x draught
564.90 ft / 557.74 ft x 55.77 ft x 19.36 ft (normal load)
172.18 m / 170.00 m x 17.00 m x 5.90 m

Armament:
9 - 5.91" / 150 mm guns (3x3 guns), 102.98lbs / 46.71kg shells, 1926 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.92" / 125 mm guns (4x2 guns), 59.59lbs / 27.03kg shells, 1926 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
16 - 1.38" / 35.0 mm guns (8x2 guns), 1.31lbs / 0.59kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.59" / 15.0 mm guns (2x4 guns), 0.10lbs / 0.05kg shells, 1926 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,425 lbs / 647 kg
Shells per gun, main battery: 300
8 - 21.7" / 550 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 401.90 ft / 122.50 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 111 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.15" / 80 mm 1.57" / 40 mm 3.15" / 80 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
4th: 0.79" / 20 mm - -
5th: 0.79" / 20 mm - -

- Armour deck: 1.57" / 40 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 72,386 shp / 54,000 Kw = 31.75 kts
Range 11,000nm at 12.00 kts (Bunkerage = 1,256 tons)

Complement:
426 - 554

Cost:
£2.285 million / $9.140 million

Distribution of weights at normal displacement:
Armament: 178 tons, 2.2 %
Armour: 1,435 tons, 17.7 %
- Belts: 595 tons, 7.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 225 tons, 2.8 %
- Armour Deck: 588 tons, 7.3 %
- Conning Tower: 27 tons, 0.3 %
Machinery: 1,913 tons, 23.7 %
Hull, fittings & equipment: 3,244 tons, 40.1 %
Fuel, ammunition & stores: 1,116 tons, 13.8 %
Miscellaneous weights: 200 tons, 2.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,971 lbs / 4,523 Kg = 96.8 x 5.9 " / 150 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 2.6 ft / 0.8 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.470
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 23.62 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 56
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: 21.98 ft / 6.70 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 18.04 ft / 5.50 m
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 18.36 ft / 5.60 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 98.6 %
- Above water (accommodation/working, high = better): 132.1 %
Waterplane Area: 20,180 Square feet or 1,875 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 99 lbs/sq ft or 482 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.40
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

The BNS's recent concentration on building up to ABUSE hull limits meant that a lot of resources were put into aircraft carrier conversions and large cruisers. Far less resources - to be more precise, none - were invested in light cruisers necessary to escort such units.

The Dombivli class light cruisers are larger updates of the earlier Kanpur class; they gain additional light guns, and ship a new 57mm weapon for anti-air purposes. They have heavier deck armor, more extensive belt protection, and increased range.

One unit will be fit into the 1942 program, and at least one additional unit is planned for 1943.

Dombivli, Bharati light cruiser, laid down 1942

Displacement:
10,237 t light; 10,875 t standard; 12,758 t normal; 14,264 t full load

Dimensions: Length overall / water x beam x draught
641.00 ft / 629.92 ft x 62.99 ft x 22.97 ft (normal load)
195.38 m / 192.00 m x 19.20 m x 7.00 m

Armament:
12 - 5.91" / 150 mm guns (4x3 guns), 102.98lbs / 46.71kg shells, 1942 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4.92" / 125 mm guns (6x2 guns), 59.59lbs / 27.03kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 2 raised mounts - superfiring
24 - 2.24" / 57.0 mm guns (12x2 guns), 5.65lbs / 2.56kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
16 - 0.59" / 15.0 mm guns (4x4 guns), 0.10lbs / 0.05kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 2,088 lbs / 947 kg
Shells per gun, main battery: 300
8 - 21.7" / 550 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 409.45 ft / 124.80 m 16.01 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 0.79" / 20 mm - -
4th: 0.39" / 10 mm - -

- Armour deck: 1.97" / 50 mm, Conning tower: 3.94" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 93,834 shp / 70,000 Kw = 33.02 kts
Range 15,000nm at 15.00 kts (Bunkerage = 3,389 tons)

Complement:
599 - 780

Cost:
£5.859 million / $23.437 million

Distribution of weights at normal displacement:
Armament: 261 tons, 2.0 %
Armour: 2,533 tons, 19.9 %
- Belts: 1,074 tons, 8.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 422 tons, 3.3 %
- Armour Deck: 992 tons, 7.8 %
- Conning Tower: 46 tons, 0.4 %
Machinery: 2,451 tons, 19.2 %
Hull, fittings & equipment: 4,785 tons, 37.5 %
Fuel, ammunition & stores: 2,521 tons, 19.8 %
Miscellaneous weights: 207 tons, 1.6 %
-50 t: 1 x floatplane and catapult aft
-157 t: Sensors, weight reserve, etc – to be further detailed.

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,591 lbs / 8,433 Kg = 180.5 x 5.9 " / 150 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 3.2 ft / 1.0 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.11

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.490
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 28.68 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.59 ft / 7.80 m
- Forecastle (20 %): 20.67 ft / 6.30 m
- Mid (50 %): 20.67 ft / 6.30 m
- Quarterdeck (15 %): 20.67 ft / 6.30 m
- Stern: 20.67 ft / 6.30 m
- Average freeboard: 21.06 ft / 6.42 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 82.3 %
- Above water (accommodation/working, high = better): 152.6 %
Waterplane Area: 27,240 Square feet or 2,531 Square metres
Displacement factor (Displacement / loading): 131 %
Structure weight / hull surface area: 109 lbs/sq ft or 535 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.41
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent

Interesting ship. Looks rather more expensive than I'd have expected, given the specs.

Why so much ammo aboard? It's anywhere from 50 to 100% more than is historically used for 6" armed ships.

I was under the impression 300 - 400 rounds was around normal for a CL's main battery. I've designed with that in mind for quite a while.

Quoted

Originally posted by The Rock Doctor
I was under the impression 300 - 400 rounds was around normal for a CL's main battery. I've designed with that in mind for quite a while.

All information I've seen indicates most navies allocated between 150 to 200 rounds per gun. The major exception I've found is the Italians, who used around forty to fifty rounds per gun in wartime; and the Dutch, who planned three hundred rounds per gun for HNLMS De Ruyter - they expected difficulties of resupply, I presume, hence the large quantity. But 150-200 rounds seems to be normal.

Good to know, thanks.

Edit: the Italian number seems strangely low - were they expecting the battle to be over that quickly?

Quoted

Originally posted by The Rock Doctor
Good to know, thanks.

Edit: the Italian number seems strangely low - were they expecting the battle to be over that quickly?

That, and they never expected to be more than a few hours from resupply. NavWeps says the loadout doubled to around 100rpg during the war, presumably because the Italians found that 50rpg war load was too small.

Looks powerful.
I'd say the 33 kts speed is what has driven the costs up but overall it has soild armour and armament.

The Bay of Bengal is prone to annual cyclones that can cause local devasation to both the population and infrastructure. A particularly powerful cyclone in the 1920s inflicted significant loss of life in the Chittagong area, and ineffectual follow-up by the government led to an insurrection. In later years, Bharati amphibious forces were generally held on stand-by to provide relief in such situations.

The BNS has now been authorized to construct two dedicated disaster relief ships that will serve as "first responders" during cyclone season, and as required during the remainder of the year. The Chattampi Swami can be described as half hospital ship, half landing ship. Her main features are:

-Hospital facilities including a triage area, two operating rooms, and 100 patient beds.

-Dry (food, tents, blankets, etc) and wet cargo (drinking water), for distribution to survivors, along with a modest water purification system.

-A vehicle hold for ambulances to collect patients and trucks to deliver aid.

-A well deck for landing craft capable of handling cargo and personnel transfers to and from shore in situations where local docks are unserviceable.

It remains to be seen whether the type proves to be effective in service; should this be the case, the BNS foresees some utility in eventually operating up to four ship vessels

Chattampi Swami, disaster relief ship laid down 1942

Displacement:
3,476 t light; 3,570 t standard; 4,704 t normal; 5,611 t full load

Dimensions: Length overall / water x beam x draught
397.87 ft / 393.70 ft x 68.90 ft x 12.14 ft (normal load)
121.27 m / 120.00 m x 21.00 m x 3.70 m

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 6,702 shp / 5,000 Kw = 18.38 kts
Range 10,000 nm at 15.00 kts (bunkerage = 1,253 tons)
Simmed as : Range 16,500nm at 15.00 kts (Bunkerage = 2,040 tons)

Complement:
283 - 369

Cost:
£0.930 million / $3.721 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 175 tons, 3.7 %
Hull, fittings & equipment: 1,794 tons, 38.1 %
Fuel, ammunition & stores: 1,228 tons, 26.1 %
Miscellaneous weights: 1,507 tons, 32.0 %
-525 t: Accommodation for 150 First-responders @ 3.5 t per
-350 t: 100 Patient Beds @ 3.5 t per
-200 t: 2 x Operating rooms + triage center
-300 t: Dry cargo
-60 t: Vehicle deck and 10 x 3 t trucks/ambulances
-32 t: 4 x LCVP @ 8 t per
-20 t: Water purification system
-20 t: Weight reserve

-450 t: 15 x 15 x 2 metre well deck (simmed as bunkerage)
-310 t: Fresh water (simmed as bunkerage)
-27 t: Gasoline (simmed as bunkerage)

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18,388 lbs / 8,341 Kg = 170.3 x 6 " / 152 mm shells or 3.7 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 4.9 ft / 1.5 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.93

Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 5.71 : 1
'Natural speed' for length: 23.80 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 37
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.62 ft / 7.20 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (20 %): 11.81 ft / 3.60 m (19.69 ft / 6.00 m before break)
- Stern: 11.81 ft / 3.60 m
- Average freeboard: 18.43 ft / 5.62 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 48.1 %
- Above water (accommodation/working, high = better): 249.0 %
Waterplane Area: 18,794 Square feet or 1,746 Square metres
Displacement factor (Displacement / loading): 253 %
Structure weight / hull surface area: 73 lbs/sq ft or 357 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 1.95
- 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
Excellent seaboat, comfortable, rides out heavy weather easily

What a fascinating idea. The French will keep an eye on these ships once they're completed to see how they do; could be potentially quite useful.

Mexico likes this idea alot too. The two amphibs I just converted and the Agbayanis are supposed to function like this as a secondary role.

Rocky, got a pic for these?

China is also fascinated ..... the CNDO will keep more than an eye on these vessels to see them in service. Yeah ... a pic would be great.

No pic. Not at present, anyway. But we could all ask Alex nicely - he might find it a unique challenge.

If you guys send my the SS-report I should use, I 'll look on this

Done!

What kind of water purification system will the ships have? It might be worth considering desalinization facilities since it will be difficult to acquire water from land in the event of a natural disaster.

Quoted

Originally posted by Delta Force
What kind of water purification system will the ships have? It might be worth considering desalinization facilities since it will be difficult to acquire water from land in the event of a natural disaster.

I hadn't given that a great deal of specific thought, but you're probably right.

A number of dedicated boom/net-laying ships are being laid down to protect the BNS' larger warships while in harbour. The sharp bow angle and much of the miscellaneous weight represents the equipment used for this function.

Peru has licenced the design, which will be essentially similar other than the light guns calibers.

Boom Defence Ship, laid down 1942

Displacement:
545 t light; 560 t standard; 605 t normal; 641 t full load

Dimensions: Length overall / water x beam x draught
184.11 ft / 173.88 ft x 28.12 ft x 7.87 ft (normal load)
56.12 m / 53.00 m x 8.57 m x 2.40 m

Armament:
1 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1942 Model
Dual purpose gun in deck mount
on centreline aft, 1 raised gun
2 - 1.38" / 35.0 mm guns in single mounts, 1.31lbs / 0.59kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, all forward
2 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1942 Model
Breech loading guns in deck mounts
on side, all aft
Weight of broadside 38 lbs / 17 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm -
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 1,600 shp / 1,194 Kw = 15.88 kts
Range 5,000nm at 10.00 kts (Bunkerage = 81 tons)

Complement:
60 - 79

Cost:
£0.184 million / $0.736 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.8 %
Armour: 3 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 42 tons, 6.9 %
Hull, fittings & equipment: 345 tons, 57.1 %
Fuel, ammunition & stores: 60 tons, 10.0 %
Miscellaneous weights: 150 tons, 24.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,341 lbs / 608 Kg = 38.0 x 4.1 " / 105 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 0.8 ft / 0.3 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.30

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.550
Length to Beam Ratio: 6.18 : 1
'Natural speed' for length: 13.19 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.72 ft / 5.40 m
- Forecastle (20 %): 9.84 ft / 3.00 m (8.86 ft / 2.70 m aft of break)
- Mid (50 %): 8.86 ft / 2.70 m
- Quarterdeck (15 %): 8.86 ft / 2.70 m
- Stern: 8.86 ft / 2.70 m
- Average freeboard: 9.69 ft / 2.95 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 56.5 %
- Above water (accommodation/working, high = better): 96.0 %
Waterplane Area: 3,412 Square feet or 317 Square metres
Displacement factor (Displacement / loading): 220 %
Structure weight / hull surface area: 65 lbs/sq ft or 317 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.68
- Longitudinal: 5.09
- Overall: 1.88
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily