Ships that have been built, building, or planned. All of these have been posted elsewhere, just condensing them into a single thread.
First up, those that have been built or building:
The refit of the TR-113 class of destroyers. Cosmetic changes, engine tune-up, armament change, and changing all those labels from English to Hebrew.
Kfir class (ex-TR-113), New Zion (ex-CSA) Destroyer laid down 1898 (Engine 1901)
Displacement:
540 t light; 561 t standard; 636 t normal; 697 t full load
Dimensions: Length overall / water x beam x draught
240.00 ft / 240.00 ft x 23.50 ft x 9.70 ft (normal load)
73.15 m / 73.15 m x 7.16 m x 2.96 m
Armament:
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1898 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1898 Model
Quick firing guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1898 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 81 lbs / 37 kg
Shells per gun, main battery: 150
4 - 20.0" / 508 mm above water torpedoes
Machinery:
Coal and oil fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 10,933 ihp / 8,156 Kw = 27.00 kts
Range 1,300nm at 15.00 kts
Bunker at max displacement = 136 tons (50% coal)
Caution: Delicate, lightweight machinery
Complement:
63 - 82
Cost:
£0.081 million / $0.324 million
Distribution of weights at normal displacement:
Armament: 10 tons, 1.6 %
Machinery: 382 tons, 60.0 %
Hull, fittings & equipment: 144 tons, 22.6 %
Fuel, ammunition & stores: 97 tons, 15.2 %
Miscellaneous weights: 4 tons, 0.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
119 lbs / 54 Kg = 8.8 x 3.0 " / 76 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.52
Metacentric height 1.2 ft / 0.4 m
Roll period: 9.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.13
Seaboat quality (Average = 1.00): 0.90
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.407
Length to Beam Ratio: 10.21 : 1
'Natural speed' for length: 15.49 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 56
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: 12.00 ft / 3.66 m
- Forecastle (20 %): 11.00 ft / 3.35 m
- Mid (50 %): 8.00 ft / 2.44 m
- Quarterdeck (15 %): 8.00 ft / 2.44 m
- Stern: 8.00 ft / 2.44 m
- Average freeboard: 9.13 ft / 2.78 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 206.6 %
- Above water (accommodation/working, high = better): 51.0 %
Waterplane Area: 3,486 Square feet or 324 Square metres
Displacement factor (Displacement / loading): 19 %
Structure weight / hull surface area: 22 lbs/sq ft or 106 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.35
- Overall: 0.55
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
***
A dynamite gunship for Lake Viktoria. The 8 misc tons are for "flagship" facilities.
(http://i2.photobucket.com/albums/y22/ReneJr/newziondestroyer2.gif)
Dead Sea, New Zion Dynamite Gun Ship laid down 1912
Displacement:
550 t light; 592 t standard; 602 t normal; 610 t full load
Dimensions: Length overall / water x beam x draught
190.00 ft / 190.00 ft x 29.00 ft x 9.10 ft (normal load)
57.91 m / 57.91 m x 8.84 m x 2.77 m
Armament:
2 - 10.00" / 254 mm guns in single mounts, 500.00lbs / 226.80kg shells, 1912 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
Quick firing guns in deck mounts
on centreline, evenly spread, all raised mounts
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
Quick firing guns in deck mounts
on side, all amidships
2 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
Quick firing guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,062 lbs / 482 kg
Shells per gun, main battery: 50
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 3,647 shp / 2,720 Kw = 20.00 kts
Range 500nm at 10.00 kts
Bunker at max displacement = 18 tons
Complement:
59 - 78
Cost:
£0.141 million / $0.562 million
Distribution of weights at normal displacement:
Armament: 133 tons, 22.1 %
Armour: 13 tons, 2.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 2.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 70 tons, 11.7 %
Hull, fittings & equipment: 326 tons, 54.1 %
Fuel, ammunition & stores: 52 tons, 8.6 %
Miscellaneous weights: 8 tons, 1.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
194 lbs / 88 Kg = 0.4 x 10.0 " / 254 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 1.3 ft / 0.4 m
Roll period: 10.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.85
Seaboat quality (Average = 1.00): 0.93
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.420
Length to Beam Ratio: 6.55 : 1
'Natural speed' for length: 13.78 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 54
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: 11.00 ft / 3.35 m
- Forecastle (50 %): 10.00 ft / 3.05 m
- Mid (50 %): 7.00 ft / 2.13 m
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 8.70 ft / 2.65 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 196.4 %
- Above water (accommodation/working, high = better): 77.6 %
Waterplane Area: 3,435 Square feet or 319 Square metres
Displacement factor (Displacement / loading): 44 %
Structure weight / hull surface area: 61 lbs/sq ft or 297 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 4.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
***
dedicated scout variant of the Lavi II class destroyer. One gun is removed and space made for an observation ballon. Part of the support equipment for the ballon replaces some of the machinery, so these ships are only capable of 27 knots. Three are to be built.
(http://i2.photobucket.com/albums/y22/ReneJr/newziondestroyerII.gif)
Lavi II, New Zion Destroyer laid down 1915
Displacement:
750 t light; 810 t standard; 871 t normal; 921 t full load
Dimensions: Length overall / water x beam x draught
330.00 ft / 330.00 ft x 30.50 ft x 7.50 ft (normal load)
100.58 m / 100.58 m x 9.30 m x 2.29 m
Armament:
2 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1912 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1912 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
Quick firing guns in deck mounts
on side, evenly spread
2 guns in hull casemates - Limited use in any sea
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1912 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 266 lbs / 121 kg
Shells per gun, main battery: 250
3 - 20.0" / 508 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm - -
Machinery:
Oil fired boilers, steam turbines,
(Note: Actually 11,000 HP & 27 knots)
Geared drive, 2 shafts, 17,369 shp / 12,958 Kw = 30.00 kts
Range 1,300nm at 15.00 kts
Bunker at max displacement = 111 tons
Complement:
79 - 104
Cost:
£0.109 million / $0.436 million
Distribution of weights at normal displacement:
Armament: 33 tons, 3.8 %
Armour: 3 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 392 tons, 45.0 %
Hull, fittings & equipment: 242 tons, 27.8 %
Fuel, ammunition & stores: 121 tons, 13.9 %
Miscellaneous weights: 80 tons, 9.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
196 lbs / 89 Kg = 3.1 x 5.0 " / 127 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.1 ft / 0.3 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.27
Seaboat quality (Average = 1.00): 0.78
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.404
Length to Beam Ratio: 10.82 : 1
'Natural speed' for length: 18.17 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 90
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: 17.00 ft / 5.18 m
- Forecastle (25 %): 13.00 ft / 3.96 m
- Mid (40 %): 13.00 ft / 3.96 m (7.50 ft / 2.29 m aft of break)
- Quarterdeck (15 %): 7.50 ft / 2.29 m
- Stern: 7.50 ft / 2.29 m
- Average freeboard: 10.10 ft / 3.08 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 186.7 %
- Above water (accommodation/working, high = better): 108.1 %
Waterplane Area: 6,210 Square feet or 577 Square metres
Displacement factor (Displacement / loading): 50 %
Structure weight / hull surface area: 26 lbs/sq ft or 125 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 0.67
- Overall: 0.52
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Now, designs that are being considered:
A very cheap patrol boat for coastal work. The quarterdeck is empty so the boat can serve as a coastal minesweeper (with simple minesweeping equipment), VERY slow torpedo boat (with 2x14" torpedoes), or raider (with a squad of marines). The boat carries 1,000 lbs of 'signaling' equipment (rockets, and a mortar).
PB-1, New Zion Patrol Boat laid down 1912
Displacement:
25 t light; 26 t standard; 28 t normal; 29 t full load
Dimensions: Length overall / water x beam x draught
92.55 ft / 90.00 ft x 10.00 ft x 2.70 ft (normal load)
28.21 m / 27.43 m x 3.05 m x 0.82 m
Armament:
1 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
Quick firing gun in deck mount
on centreline
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 4 lbs / 2 kg
Shells per gun, main battery: 250
Machinery:
Petrol Internal combustion motors,
Direct drive, 1 shaft, 218 shp / 163 Kw = 15.00 kts
Range 500nm at 10.00 kts
Bunker at max displacement = 2 tons
Complement:
5 - 7
Cost:
£0.003 million / $0.010 million
Distribution of weights at normal displacement:
Armament: 0 tons, 1.8 %
Machinery: 9 tons, 31.3 %
Hull, fittings & equipment: 12 tons, 43.7 %
Fuel, ammunition & stores: 2 tons, 8.8 %
Miscellaneous weights: 4 tons, 14.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
24 lbs / 11 Kg = 6.3 x 2.0 " / 50 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 0.2 ft / 0.1 m
Roll period: 9.0 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.14
Seaboat quality (Average = 1.00): 1.31
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.400
Length to Beam Ratio: 9.00 : 1
'Natural speed' for length: 9.49 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 38
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: 7.00 ft / 2.13 m
- Forecastle (20 %): 5.00 ft / 1.52 m
- Mid (40 %): 4.00 ft / 1.22 m
- Quarterdeck (20 %): 4.00 ft / 1.22 m
- Stern: 4.00 ft / 1.22 m
- Average freeboard: 4.46 ft / 1.36 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 131.7 %
- Above water (accommodation/working, high = better): 83.2 %
Waterplane Area: 524 Square feet or 49 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 11 lbs/sq ft or 56 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 3.45
- Overall: 0.84
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily
***
These are a low cost torpedo boat that can be built in numbers. Should be quite handy around the Rift. Numbers built is still up in the air.
Seekan, New Zion Destroyer laid down 1916
Displacement:
302 t light; 316 t standard; 328 t normal; 338 t full load
Dimensions: Length overall / water x beam x draught
250.00 ft / 250.00 ft x 21.00 ft x 5.40 ft (normal load)
76.20 m / 76.20 m x 6.40 m x 1.65 m
Armament:
3 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
Breech loading guns in deck mounts
on centreline, evenly spread
Aft Main mounts separated by engine room
2 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1916 Model
Quick firing guns in deck mounts
on side, all amidships
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
Machine guns in deck mounts
on centreline, all aft
Weight of broadside 48 lbs / 22 kg
Shells per gun, main battery: 250
4 - 20.0" / 508 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 10,688 shp / 7,973 Kw = 30.00 kts
Range 1,300nm at 10.00 kts
Bunker at max displacement = 22 tons
Complement:
38 - 50
Cost:
£0.065 million / $0.259 million
Distribution of weights at normal displacement:
Armament: 6 tons, 1.8 %
Machinery: 171 tons, 52.3 %
Hull, fittings & equipment: 114 tons, 34.8 %
Fuel, ammunition & stores: 26 tons, 8.0 %
Miscellaneous weights: 10 tons, 3.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
95 lbs / 43 Kg = 7.0 x 3.0 " / 76 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 0.7 ft / 0.2 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 0.74
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.405
Length to Beam Ratio: 11.90 : 1
'Natural speed' for length: 15.81 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 67
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: 14.00 ft / 4.27 m
- Forecastle (20 %): 9.00 ft / 2.74 m
- Mid (40 %): 9.00 ft / 2.74 m
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 8.65 ft / 2.64 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 187.1 %
- Above water (accommodation/working, high = better): 70.7 %
Waterplane Area: 3,241 Square feet or 301 Square metres
Displacement factor (Displacement / loading): 38 %
Structure weight / hull surface area: 20 lbs/sq ft or 96 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.18
- Overall: 0.54
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
***
Another new ship. A specialized gunboat designed to protect minefields from being swept. Placed on top of said minefields it's job would be to destroy any minesweepers. It's very low draught means it ccan operate in minefields shallow enough to sink destroyers.
Also it is extremly cheap, so can be built in large numbers and very fast.
New Zion Gunboat laid down 1912
Displacement:
70 t light; 76 t standard; 78 t normal; 80 t full load
Dimensions: Length overall / water x beam x draught
150.00 ft / 150.00 ft x 17.00 ft x 2.50 ft (normal load)
45.72 m / 45.72 m x 5.18 m x 0.76 m
Armament:
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
2 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1912 Model
Quick firing guns in deck mounts
on centreline, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 28 lbs / 13 kg
Shells per gun, main battery: 250
Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 361 shp / 270 Kw = 15.00 kts
Range 500nm at 10.00 kts
Bunker at max displacement = 5 tons
Complement:
13 - 17
Cost:
£0.007 million / $0.030 million
Distribution of weights at normal displacement:
Armament: 4 tons, 4.5 %
Machinery: 14 tons, 18.4 %
Hull, fittings & equipment: 48 tons, 61.4 %
Fuel, ammunition & stores: 8 tons, 10.6 %
Miscellaneous weights: 4 tons, 5.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
150 lbs / 68 Kg = 11.1 x 3.0 " / 76 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 0.4 ft / 0.1 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.430
Length to Beam Ratio: 8.82 : 1
'Natural speed' for length: 12.25 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 67
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: 7.00 ft / 2.13 m
- Forecastle (20 %): 5.00 ft / 1.52 m
- Mid (40 %): 5.00 ft / 1.52 m
- Quarterdeck (15 %): 5.00 ft / 1.52 m
- Stern: 5.00 ft / 1.52 m
- Average freeboard: 5.16 ft / 1.57 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.5 %
- Above water (accommodation/working, high = better): 111.4 %
Waterplane Area: 1,521 Square feet or 141 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 22 lbs/sq ft or 110 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.36
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
You've got very low BC for some rather slow ships.
I don't imagine 4 t will allow for more minesweeping kit than a couple of machine guns for shooting mines at the surface.
The scout balloon ought to be simmed as miscellaneous weight, since it's above the waterline and can more easily be broken out in the sim report.
I like the notion of the minefield gunboat's mission, and the torpedo-boat looks reasonably useful.
You should be rebuilding all those now Zionist Swiss cruisers with low hull-strengths.
Oh yeah, that's right - one of these ships above had insufficient hull strength.
Low BCs tend to be one of my design quirks, just about all the ships I have designed (here and in WW) have low BCs.
A fishing rig and a line between two boats shouldn't be more than 4 tons. But yeah it wouldn't be a full sweeping rig.
The scout balloon is simmed using misc weight (80t vs 50t for regular Lavi), but some of the equipment to support it would be below the waterline, hence the note.
Which ships has insufficient hull strength? All are above 0.5 CS.
The Pegasus class is at .9 composite. The Ashmunein is at .9 composite. And both of those are about 750 tons.
Those designs have been grandfathered.
The PB-1 class above has low hull strength.
25t...70t...
You could probably have 1 class.
Easier for maintenance & options.
Jef ;)
He could also use the MAS boat Tech to create such ships in numbers.