Parthian Ships 1928 +

Kaiser Kirk · April 22, 2024, 09:17:17 PM

The Saka / Massagatae I started with a more conventional refurbishment into an up-to-date cruiser.

Then I had the idea...what about a CLAA cruiser?

The Saka within 0.5m of the Atlanta's beam, so can have the wing mounts.

The problem is the Atlantas were laid down in 1940.
BUT the DIDOs were first laid in 1937.
HY2 I want I can start researching 1934-1937 aircraft, so the conceptual threats the DIDO was built in response are 'on the horizon'.

So ..thoughts? I can always redo this as a conventional cruiser.

QuoteSaka / Massagatea, Parthian Cruiser - Anti Aircraft laid down 1911 (Engine 1932)

Displacement:
   6,540 t light; 6,952 t standard; 7,974 t normal; 8,792 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (482.28 ft / 475.72 ft) x 50.85 ft x (21.33 / 23.04 ft)
   (147.00 m / 145.00 m) x 15.50 m x (6.50 / 7.02 m)

Armament:
16 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 260 per gun
     Dual purpose guns in deck and hoist mounts, 1931 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x 2-gun mounts on sides, forward deck aft
16 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 2,800 per gun
     Anti-air guns in deck mounts, 1929 Model
     4 x 2 row quad mounts on side ends, evenly spread
      4 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,800 per gun
     Machine guns in deck mounts, 1929 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
Weight of broadside 1,410 lbs / 640 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   323.49 ft / 98.60 m   11.48 ft / 3.50 m
   Ends:   Unarmoured
   Upper:   1.57" / 40 mm   323.49 ft / 98.60 m   6.56 ft / 2.00 m
     Main Belt covers 105 % of normal length

- Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   1.38" / 35 mm      1.97" / 50 mm
   2nd:   0.31" / 8 mm     -           -
   3rd:   0.31" / 8 mm     -           -

- Protected deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.38" / 35 mm Quarter deck: 1.77" / 45 mm

- Conning towers: Forward 2.56" / 65 mm, Aft 2.56" / 65 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 63,897 shp / 47,667 Kw = 30.00 kts
   Range 8,000nm at 16.00 kts
   Bunker at max displacement = 1,840 tons

Complement:
   421 - 548

Cost:
   £0.608 million / $2.432 million

Distribution of weights at normal displacement:
   Armament: 349 tons, 4.4 %
     - Guns: 349 tons, 4.4 %
   Armour: 1,621 tons, 20.3 %
     - Belts: 677 tons, 8.5 %
     - Armament: 103 tons, 1.3 %
     - Armour Deck: 798 tons, 10.0 %
     - Conning Towers: 44 tons, 0.6 %
   Machinery: 1,886 tons, 23.7 %
   Hull, fittings & equipment: 2,373 tons, 29.8 %
   Fuel, ammunition & stores: 1,434 tons, 18.0 %
   Miscellaneous weights: 311 tons, 3.9 %
     - Hull below water: 21 tons
     - Hull void weights: 120 tons
     - Hull above water: 12 tons
     - On freeboard deck: 48 tons
     - Above deck: 110 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,438 lbs / 4,281 Kg = 140.8 x 5.1 " / 130 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.58
   Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.541 / 0.552
   Length to Beam Ratio: 9.35 : 1
   'Natural speed' for length: 21.81 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 23.98 ft / 7.31 m, 22.64 ft / 6.90 m
     - Forward deck:   34.00 %, 22.64 ft / 6.90 m, 21.65 ft / 6.60 m
     - Aft deck:   33.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
     - Quarter deck:   13.00 %, 13.45 ft / 4.10 m, 13.45 ft / 4.10 m
     - Average freeboard:      18.35 ft / 5.59 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.1 %
      - Above water (accommodation/working, high = better): 135.3 %
   Waterplane Area: 16,742 Square feet or 1,555 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 88 lbs/sq ft or 429 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.94
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

1932 Refit of Saka / Massagatae Class :

This becomes the first Parthain version of the Atlanta Class

Original Engine, Turbine : 2007
Original Bunker, mixed : 2880
Original main mag : 199

Guns :
165L45 -> 130L47 HALA w/power assist
90L50 AA -> Quad 37mm AA
7.5mm MG -> GAST 23mm

Armor :
Add 25mm armor deck capping upper belt
laminate 15mm over old protective deck
total : 768-358 = 410

Vertical : 25/2 + 30+(15*.8) = 54.5

New engines : 1886
New bunkers : 1840

refurb 1932
Base : $1.2

A) Armanent & Machinery
New weapons : 349
New machinery : 1886
------
2235

$ : 4.47
BP : 2.235

B) Armor & Functional Misc Wt
103t Weapon Armor
410t Ship Armor
Funct Misc Wt : 231
----
744t

$ : 0.744
BP : 0.744

C) Hull, fittings and Equipment
None

D) Fuel, Magazines, NF Misc Wt
New Bunker : 1840
New magazine : 252
-----
2092/2000

$1.046

total
$ 7.46
BP 2.98

Functional Misc Wt : (351-120) = 231

Reserve : 120t

AD :
35t FC1930
25t LR Radio
0t SR Radio
25t Aft Searchlight tower
25t Hulesmeyer Proximity Detector

OD
5t Paravanes
43t Power Assist Main Battery

HAW
6t CO2 Climate Control
6t Fire Ext

HBW
6t Extra Pumps
15t - Enhanced Hydrophones

Decks :

6.35 : 5th Deck,
3.85 : 4th Deck, weather deck : Top of Upper belt.
1.85m : Top of Main belt, bottom of upper belt
1.35: 3rd Deck, crown of protective deck
-1.15 : 2nd Deck, bottom edge of protective deck
1.4m : Bottom of main belt
-3.65 : 1st Deck
-6.15 : Engineering Deck

Jefgte · April 23, 2024, 12:51:46 AM

I also make an SS with:
6T2x133/51 (Dido)
1932 - 6000t - 30kts

Not in the PLAN.

TacCovert4 · April 23, 2024, 04:37:46 AM

I have done the same with 6 x 2 x 120/55, I'm in the same boat with aircraft tech. I keep considering it, I might pull the trigger in 35 given there are no treaties regulating aircraft carriers, I have a neighbor rival which a CLAA in the mid 30s would be considered perfectly adequate for defending against aircraft from, etc.

The Rock Doctor · April 23, 2024, 06:25:24 AM

Recycling the old raiders into seaplane cruisers is a good use of the hulls.

I'm not diving into CLAA territory yet, but given what happened in 1923, I don't think it's unreasonable for people to be thinking about it a little earlier than OTL.

Of course I typed that out and then realized that I'm retrofitting my more recent 130mm cruisers with DP mounts, so they're functionally equivalent to CLAA so never mind me.

Kaiser Kirk · April 23, 2024, 09:16:49 AM

CLAA really wasn't on my mind,

but the point of choosing 130 originally was looking for a weight where 2G could replace 1G 165
and I just have the new 130L47 with heavyweight 39kg
that shell weight I went 'looking for', as Jefgte said the French had a 40kg limit for rapid fire,
so I looked at various gun sizes where an overweight shell would be 40kg,
The 130 at 39kg was 'close enough'.

Then I've been fielding HALA mounts, but the same tech gives improved DP mounts - so true DP.

So it occurred to me that refitting an old cruiser to trial the idea might make sense
in the way a new build would not.

Kaiser Kirk · April 23, 2024, 06:25:17 PM

Back on the theme of Coastal Destroyers, I did not give up on the idea,
but the various demands did drive it over 500t.

I'd build this or the Pesh Kabr, but I always seem to lack BP. Wierd.

This was the most recent version, with the ASW components taking substantial tonnage.
Dumping that would free 24 tons that could be put to torpedoes, for 32t total -
good enough for 8 x 21" 4t each.

Dropping the guns back down to 4x 90mm would about break even I think.

The vessel has acceptable seakeeping, but is really meant to operate on 24=48hr patrols
at 18+ knots.
Designed for areas that might get cut off, relying on local coal sources on cruise, and keeping the oil fires lit at minimum.
ramping up to full at sight of anything.

QuoteSea Hornet V, Parthian Coastal Destroyer laid down 1924 (Engine 1932)

Displacement:
650 t light; 677 t standard; 730 t normal; 773 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(245.64 ft / 241.67 ft) x 25.43 ft x (9.02 / 9.42 ft)
(74.87 m / 73.66 m) x 7.75 m x (2.75 / 2.87 m)

Armament:
2 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 160 per gun
Quick firing guns in deck mounts, 1931 Model
2 x 2-gun mounts on centreline ends, evenly spread
2 - 1.18" / 30.0 mm 80.0 cal guns - 0.95lbs / 0.43kg shells, 1,600 per gun
Anti-air guns in deck mount, 1929 Model
1 x 2-gun mount on sides, aft deck forward
1 raised mount
8 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 1,200 per gun
Anti-air guns in deck mounts, 1929 Model
4 x Twin mounts on side ends, evenly spread
4 raised mounts
Weight of broadside 113 lbs / 51 kg

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 1 shaft, 18,553 shp / 13,840 Kw = 29.60 kts
Range 910nm at 18.00 kts
Bunker at max displacement = 96 tons (66% coal)

Complement:
69 - 91

Cost:
£0.245 million / $0.979 million

Distribution of weights at normal displacement:
Armament: 19 tons, 2.7 %
- Guns: 19 tons, 2.7 %
Machinery: 364 tons, 49.9 %
Hull, fittings & equipment: 218 tons, 29.9 %
Fuel, ammunition & stores: 80 tons, 10.9 %
Miscellaneous weights: 48 tons, 6.6 %
- Hull below water: 15 tons
- Hull void weights: 9 tons
- Hull above water: 1 tons
- On freeboard deck: 19 tons
- Above deck: 4 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
228 lbs / 103 Kg = 4.9 x 4.5 " / 115 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.461 / 0.467
Length to Beam Ratio: 9.50 : 1
'Natural speed' for length: 15.55 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 13.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 17.22 ft / 5.25 m, 14.11 ft / 4.30 m
- Forward deck: 20.00 %, 14.11 ft / 4.30 m, 12.30 ft / 3.75 m
- Aft deck: 45.00 %, 12.30 ft / 3.75 m, 12.30 ft / 3.75 m
- Quarter deck: 15.00 %, 12.30 ft / 3.75 m, 12.30 ft / 3.75 m
- Average freeboard: 13.09 ft / 3.99 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 171.5 %
- Above water (accommodation/working, high = better): 131.1 %
Waterplane Area: 3,776 Square feet or 351 Square metres
Displacement factor (Displacement / loading): 58 %
Structure weight / hull surface area: 26 lbs/sq ft or 126 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 3.94
- Overall: 0.61
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

Designed as a Coastal Torpedo Boat, and intended to remain viable if cut off.

A pair of the new 115L47s provide 'punch',
augmented by a set of Quad 18" TT

For ASW work, an enhanced hydrophone package is paired with depth charges off the stern and a ASW Howitzer for foreward fire.

The Howitzer is also expected to be effective in shore bombardments if needed.

For Customs / Boarding Actions, 15mm GAST (4 barrels total) are mounted with the expectation that the same mount could be used on attacking aircraft. The small, swift, shallow draft TB is expected to be very hard to an aircraft to hit, so strafing is viewed as the major threat.

Range :
Conceptually the boilers will mainly burn coal, or even wood for most operations. Oil spray may be used for a boost.
The Oil-fire boilers wil be kept on standby with water held at temperature for sprints.

13,840shp
3014 shp on 1/5 coal power : 18knots
9,134 shp coal fired - 26.9k nots
4,567shp oil fired - last 2.5 knots, or 22.75knt on oil alone

AD :
2.2t Fire Control
2.2t Night fighting provisions (Binoculars, sm. search lights, running lights, red ready rooms etc)
0t SR Radio

OD
8t 1 TT4 18" Torps
2t Paravanes
2t 2x Y DC throwers
7t 21x 280kg Depth Charges, 2 rails

HAW
0.7t CO2 Compressor AC

HBW
15t Enhanced Hydrophone package

Decks : 2.45m
5.40 Forecastle Deck
2.95 Weather Deck
0.50 Strength deck
-1.95 1st Deck, pierced by engines
-2.30 Enginering / fuel in double bottom fore.

The Rock Doctor · April 23, 2024, 06:40:43 PM

That's a pretty handy unit but you need just a teeny bit more machinery weight there.

Kaiser Kirk · April 23, 2024, 07:19:56 PM

I have that happen occasionally, I finish a ship, save it, and when I reopen it the comp hull is .01 off, or the machinery (here) is off.

One benefit of my adding Reserve weight to the void spaces is it gets counted into the Comp hull
and machinery calculations.

Dropping the Misc Wt. in the voids from 9 to 7 gets to 50.0%

Between guns and misc wt, 65 tons or 10% into potential weaponry.

Now if you change it to oil firing, speed has to go up for the same machinery weight,
which drops the seakeeping, or you have to dip into that 65 tons for more freeboard.

The Rock Doctor · April 23, 2024, 07:48:25 PM

Quote from: Kaiser Kirk on April 23, 2024, 07:19:56 PMI have that happen occasionally, I finish a ship, save it, and when I reopen it the comp hull is .01 off, or the machinery (here) is off.

One benefit of my adding Reserve weight to the void spaces is it gets counted into the Comp hull
and machinery calculations.

Dropping the Misc Wt. in the voids from 9 to 7 gets to 50.0%

Between guns and misc wt, 65 tons or 10% into potential weaponry.

Now if you change it to oil firing, speed has to go up for the same machinery weight,
which drops the seakeeping, or you have to dip into that 65 tons for more freeboard.

I've had the same problem when simming my larger torpedo-boats. They're always the most challenging type of unit to work through.

Kaiser Kirk · April 23, 2024, 07:49:08 PM

Between 1920 and 1931, Parthia built 84 Fleet Destroyers and Corvettes.

The Wolf/Dire Wolf Fleet Destroyers are ~1150 tons while the Leopard/Tiger Corvettes are ~1500, and they are similar in capability, but the Corvettes have longer ranges for Pacific service.

in 1932 the Parthians want to commence a new class - the Lion class Corvette.

Featuring the HALA 115mm as well as light AA, a well rounded ASW suite, decent torpedo loadout
and good gun 'punch', they re fast and long legged.

As fleet cruise speeds edge up, the DDs try to stay 2knots ahead, to allow them to roam around the formation. So with some larger ships at 16 knots, these are 18knots.

QuoteSher - Lion, Parthian Corvette laid down 1932

Displacement:
2,000 t light; 2,128 t standard; 2,518 t normal; 2,830 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.68 ft / 388.22 ft) x 40.78 ft x (13.25 / 14.36 ft)
(119.99 m / 118.33 m) x 12.43 m x (4.04 / 4.38 m)

Armament:
6 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 330 per gun
Dual purpose guns in deck mounts, 1931 Model
3 x 2-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
8 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,450 per gun
Anti-air guns in deck mounts, 1929 Model
1 x 2 row quad mount on sides, forward deck aft
1 raised mount
1 x 2 row quad mount on sides, aft deck forward
1 raised mount
8 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 3,000 per gun
Anti-air guns in deck mounts, 1929 Model
4 x Twin mounts on side ends, evenly spread
4 raised mounts
Weight of broadside 348 lbs / 158 kg

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.24" / 6 mm 0.24" / 6 mm -
2nd: 0.24" / 6 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 46,893 shp / 34,982 Kw = 32.85 kts
Range 4,540nm at 18.00 kts
Bunker at max displacement = 703 tons

Complement:
177 - 231

Cost:
£1.196 million / $4.785 million

Distribution of weights at normal displacement:
Armament: 65 tons, 2.6 %
- Guns: 65 tons, 2.6 %
Armour: 6 tons, 0.2 %
- Armament: 6 tons, 0.2 %
Machinery: 1,261 tons, 50.1 %
Hull, fittings & equipment: 563 tons, 22.3 %
Fuel, ammunition & stores: 518 tons, 20.6 %
Miscellaneous weights: 106 tons, 4.2 %
- Hull below water: 25 tons
- Hull void weights: 20 tons
- Hull above water: 2 tons
- On freeboard deck: 46 tons
- Above deck: 13 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
740 lbs / 336 Kg = 15.9 x 4.5 " / 115 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.45
Metacentric height 2.5 ft / 0.8 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.17
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.420 / 0.436
Length to Beam Ratio: 9.52 : 1
'Natural speed' for length: 19.70 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 16.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.03 ft / 5.80 m, 16.40 ft / 5.00 m
- Forward deck: 37.00 %, 16.40 ft / 5.00 m, 14.11 ft / 4.30 m
- Aft deck: 28.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m
- Quarter deck: 15.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m
- Average freeboard: 15.20 ft / 4.63 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 171.7 %
- Above water (accommodation/working, high = better): 156.8 %
Waterplane Area: 9,870 Square feet or 917 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 35 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.24
- Overall: 0.54
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform

703

The Sher class corvette combines decent sea keeping with sufficient cruise speed to move around the formation, and sufficent range to do so for the length of the journey. Class floatation is very good,

The Sher class is first to field the new DP 115L47 gun firing a 120% weight shell of 25kg.

The gun weighs the same as the older 120L43, with the same shell weight, but the higher MV and better section density of the 115mm vs 120mm round should produce a flatter firing round that travels faster further, allowing for better accuracy against air targets and even surface targets.

The consideration that AA rounds will have to added to the CP/SAP/AP loadout has increased the standard ammo supply from 220-250 to 330 rounds. Conceptually they expect AA engagements to be short bursts as a squadron of planes come through, not long engagements.

Reserve
20t

AD
6.5 FC
6.5 NF
0t SR Radio

OD
2t Lt. Paravanes
32t 2TT4 21' 4t Torpedoes

4t 2x Y thrower
8t 324x 280kg DC

HAW
2t C02 Compressor AC

HBW
15t Enhanced Hydrophones
10t Basic Sonar

Kaiser Kirk · April 24, 2024, 11:04:01 PM

Along with the new Destroyer, the 2000 ton class allows me to create a new fast Minelayer.

QuoteXwarg- Live Coal, Parthian Fast Minelaying Corvette laid down 1932

Displacement:
   2,000 t light; 2,098 t standard; 2,518 t normal; 2,855 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.68 ft / 388.22 ft) x 40.78 ft x (13.25 / 14.45 ft)
   (119.99 m / 118.33 m) x 12.43 m x (4.04 / 4.40 m)

Armament:
3 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 330 per gun
     Dual purpose guns in deck mounts, 1932 Model
     3 x 2-gun mounts on centreline ends, majority forward
      1 raised mount - superfiring
8 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,450 per gun
     Anti-air guns in deck mounts, 1932 Model
     1 x 2 row quad mount on sides, forward deck aft
      1 raised mount
     1 x 2 row quad mount on sides, aft deck forward
      1 raised mount
8 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 3,000 per gun
     Anti-air guns in deck mounts, 1932 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
Weight of broadside 183 lbs / 83 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm   0.24" / 6 mm        -
   2nd:   0.24" / 6 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 46,290 shp / 34,532 Kw = 32.75 kts
   Range 2,870nm at 22.00 kts
   Bunker at max displacement = 757 tons

Complement:
   177 - 231

Cost:
   £1.164 million / $4.654 million

Distribution of weights at normal displacement:
   Armament: 36 tons, 1.4 %
     - Guns: 36 tons, 1.4 %
   Armour: 6 tons, 0.2 %
     - Armament: 6 tons, 0.2 %
   Machinery: 1,261 tons, 50.1 %
   Hull, fittings & equipment: 567 tons, 22.5 %
   Fuel, ammunition & stores: 518 tons, 20.6 %
   Miscellaneous weights: 130 tons, 5.2 %
     - Hull void weights: 15 tons
     - Hull above water: 2 tons
     - On freeboard deck: 105 tons
     - Above deck: 8 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     766 lbs / 348 Kg = 16.5 x 4.5 " / 115 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.39
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.420 / 0.437
   Length to Beam Ratio: 9.52 : 1
   'Natural speed' for length: 19.70 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 16.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 19.03 ft / 5.80 m, 16.40 ft / 5.00 m
     - Forward deck:   40.00 %, 16.40 ft / 5.00 m, 14.11 ft / 4.30 m
     - Aft deck:   25.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m
     - Quarter deck:   15.00 %, 14.11 ft / 4.30 m, 14.11 ft / 4.30 m
     - Average freeboard:      15.24 ft / 4.64 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 167.1 %
      - Above water (accommodation/working, high = better): 157.4 %
   Waterplane Area: 9,870 Square feet or 917 Square metres
   Displacement factor (Displacement / loading): 85 %
   Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.21
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

The Xwarg (Live Coal) Class Fast Minelayer is envisioned as a follow on to the Sahog class.

The consideration that AA rounds will have to added to the CP/SAP/AP loadout has increased the standard ammo supply from 220-250 to 330 rounds. Conceptually they expect AA engagements to be short bursts as a squadron of planes come through, not long engagements.

Reserve
15t

AD
4 FC 1930
4 NF 1930
0t SR Radio

OD
5t Lt. Paravanes
100t - Mines

HAW
2t C02 Compressor AC

HBW

Kaiser Kirk · April 29, 2024, 11:48:17 PM

Opportunity cost... for me, part of designing a ship is considering the fleet and the national setting.

So, I have 50+ versions of the Xiyon series, yet having trimmed and fiddled with it to get a 15,000 ton version.
Yet I feel compelled to ask what it would take to have similar parameters but either fewer or more guns

Since 6 guns are a popular minimal armament, I explored the lower end.
I Also explored 12 or 16 x 215mm
The 16x215mm wound up 20,500 tons,
but that's only 1,000 tons over the 19,500ton 12x215, but the 12x has much better armor.

That's similar to the 255mm cruisers, but far more shells, though the 215mm gun is close to the same ability as the 255, it comes up short in deck pen over 20,000m, which the 255L47 is meant for.

Quote#1 of 2
Zadar 'Smiter', Parthian Light Armored Cruiser laid down 1932

Displacement:
11,500 t light; 12,205 t standard; 13,316 t normal; 14,205 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(622.66 ft / 616.80 ft) x 65.62 ft x (24.61 / 25.79 ft)
(189.79 m / 188.00 m) x 20.00 m x (7.50 / 7.86 m)

Armament:
6 - 8.46" / 215 mm 47.0 cal guns - 396.83lbs / 180.00kg shells, 180 per gun
Breech loading guns in turret on barbette mounts, 1932 Model
3 x 2-gun mounts on centreline, evenly spread
1 raised mount
14 - 4.53" / 115 mm 47.0 cal guns - 55.12lbs / 25.00kg shells, 360 per gun
Dual purpose guns in deck and hoist mounts, 1932 Model
6 x 2-gun mounts on side ends, majority forward
1 x 2-gun mount on sides, aft deck centre
1 raised mount
24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,600 per gun
Anti-air guns in deck and hoist mounts, 1932 Model
4 x 2-gun mounts on sides, evenly spread
4 raised mounts
2 x 2-gun mounts on sides forward
2 double raised mounts
16 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 2,500 per gun
Machine guns in deck mounts, 1932 Model
8 x Twin mounts on sides, evenly spread
8 double raised mounts
Weight of broadside 3,201 lbs / 1,452 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.31" / 135 mm 400.92 ft / 122.20 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main Belt inclined -12.00 degrees (positive = in)

- Hull void:
0.00" / 0 mm 0.00 ft / 0.00 m 0.00 ft / 0.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.50" / 165 mm 2.36" / 60 mm 5.51" / 140 mm
2nd: 1.57" / 40 mm 1.38" / 35 mm 1.57" / 40 mm
4th: 0.31" / 8 mm 0.31" / 8 mm 0.31" / 8 mm
5th: 0.31" / 8 mm - -

- Armoured deck - single deck:
For and Aft decks: 2.36" / 60 mm
Forecastle: 0.98" / 25 mm Quarter deck: 2.36" / 60 mm

- Conning towers: Forward 4.92" / 125 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 98,387 shp / 73,397 Kw = 32.00 kts
Range 8,556nm at 14.00 kts
Bunker at max displacement = 2,000 tons

Complement:
619 - 805

Cost:
£4.872 million / $19.489 million

Distribution of weights at normal displacement:
Armament: 786 tons, 5.9 %
- Guns: 786 tons, 5.9 %
Armour: 2,760 tons, 20.7 %
- Belts: 1,148 tons, 8.6 %
- Armament: 458 tons, 3.4 %
- Armour Deck: 1,094 tons, 8.2 %
- Conning Tower: 60 tons, 0.4 %
Machinery: 2,904 tons, 21.8 %
Hull, fittings & equipment: 4,580 tons, 34.4 %
Fuel, ammunition & stores: 1,816 tons, 13.6 %
Miscellaneous weights: 470 tons, 3.5 %
- Hull below water: 40 tons
- Hull void weights: 70 tons
- Hull above water: 33 tons
- On freeboard deck: 154 tons
- Above deck: 173 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,368 lbs / 6,971 Kg = 50.7 x 8.5 " / 215 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.3 ft / 1.0 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.468 / 0.476
Length to Beam Ratio: 9.40 : 1
'Natural speed' for length: 24.84 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: -3.28 ft / -1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 27.56 ft / 8.40 m, 22.64 ft / 6.90 m
- Forward deck: 28.00 %, 22.64 ft / 6.90 m, 22.64 ft / 6.90 m
- Aft deck: 37.00 %, 14.44 ft / 4.40 m, 14.44 ft / 4.40 m
- Quarter deck: 15.00 %, 14.44 ft / 4.40 m, 14.44 ft / 4.40 m
- Average freeboard: 18.77 ft / 5.72 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.8 %
- Above water (accommodation/working, high = better): 144.9 %
Waterplane Area: 26,210 Square feet or 2,435 Square metres
Displacement factor (Displacement / loading): 115 %
Structure weight / hull surface area: 120 lbs/sq ft or 587 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.42
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

Warning: Beam between bulkheads too wide

1931 Basic AA Refits

187t 120L43AS 25kg -> 120L43 HALA 25kg
75t 90L50 11kg -> 90L54 HALA 11kg
75t 2G 57mm AA -> 4G 37mm AA
15.4 15mm AAMG -> 23mm AAMG
88t Replace FC 1930
5t- Add paravanes
------
446

MB Height : 1.6 AWL to -1.5BWL = 3.
3.21cos(12) = 3.169 =3.17

70t - Reserve

AD
86t - Fire Control 1930
25t - LR Radio
10t - SR Radio -dedicated AC command center
0t - SR Radio
25t - Searchlight tower (NF)
25t - Hulesmeyer

OD
5t - Paravanes
18t - 2TT3 21" 3t on stern
55t - 2x 20+5 - Fighter Float + Gunpwdr CAT
76t - 10% rotating wt Power Assist for 180L47

HAW
8t - CO2 Compresser A/C
25t - Enhanced Fire Ext.

HBW
15t - Enhanced Hydrophones
25t - Extra Pumps.

Decks
+6.5 Forecastle Deck
+4.1 Weather Deck
+1.6 Battery Deck Top belt, Armored Deck
-1.00 Deck
-1.5 Bottom main belt
-3.50
-5.80 Engineering
-6.9 Keel, double bottom

Quote#2 of 2
Zamdag "Rampant' II, Parthian Light Armored Cruiser laid down 1933

Displacement:
19,500 t light; 20,901 t standard; 24,119 t normal; 26,693 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(685.70 ft / 679.13 ft) x 68.90 ft (Bulges 75.46 ft) x (31.50 / 34.33 ft)
(209.00 m / 207.00 m) x 21.00 m (Bulges 23.00 m) x (9.60 / 10.46 m)

Armament:
12 - 8.46" / 215 mm 47.0 cal guns - 396.83lbs / 180.00kg shells, 200 per gun
Breech loading guns in turret on barbette mounts, 1931 Model
3 x 4-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
16 - 5.12" / 130 mm 47.0 cal guns - 85.98lbs / 39.00kg shells, 400 per gun
Dual purpose guns in deck and hoist mounts, 1929 Model
6 x 2-gun mounts on sides, evenly spread
2 x 2-gun mounts on centreline ends, evenly spread
2 double raised mounts
24 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 2,400 per gun
Dual purpose guns in deck and hoist mounts, 1929 Model
6 x 2 row quad mounts on sides, evenly spread
6 raised mounts
24 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 5,000 per gun
Anti-air guns in deck mounts, 1929 Model
12 x Twin mounts on sides, evenly spread
12 double raised mounts
Weight of broadside 6,190 lbs / 2,808 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.09" / 180 mm 482.19 ft / 146.97 m 13.88 ft / 4.23 m
Ends: 1.38" / 35 mm 196.92 ft / 60.02 m 12.01 ft / 3.66 m
Main Belt covers 109 % of normal length
Main Belt inclined -15.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.97" / 50 mm 482.19 ft / 146.97 m 35.53 ft / 10.83 m
Beam between torpedo bulkheads 49.21 ft / 15.00 m

- Hull Bulges:
0.35" / 9 mm 442.91 ft / 135.00 m 25.59 ft / 7.80 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.27" / 210 mm 3.94" / 100 mm 5.91" / 150 mm
2nd: 2.56" / 65 mm 1.57" / 40 mm 1.57" / 40 mm
3rd: 0.31" / 8 mm - 0.31" / 8 mm
4th: 0.31" / 8 mm - -

- Armoured deck - single deck:
For and Aft decks: 3.15" / 80 mm
Forecastle: 1.57" / 40 mm Quarter deck: 3.15" / 80 mm

- Conning towers: Forward 8.27" / 210 mm, Aft 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 140,832 shp / 105,061 Kw = 32.00 kts
Range 6,132nm at 22.00 kts
Bunker at max displacement = 5,792 tons

Complement:
967 - 1,258

Cost:
£8.268 million / $33.071 million

Distribution of weights at normal displacement:
Armament: 1,471 tons, 6.1 %
- Guns: 1,471 tons, 6.1 %
Armour: 6,257 tons, 25.9 %
- Belts: 2,039 tons, 8.5 %
- Torpedo bulkhead: 1,248 tons, 5.2 %
- Bulges: 149 tons, 0.6 %
- Armament: 856 tons, 3.6 %
- Armour Deck: 1,788 tons, 7.4 %
- Conning Towers: 177 tons, 0.7 %
Machinery: 4,104 tons, 17.0 %
Hull, fittings & equipment: 6,988 tons, 29.0 %
Fuel, ammunition & stores: 4,619 tons, 19.2 %
Miscellaneous weights: 680 tons, 2.8 %
- Hull below water: 30 tons
- Bulge void weights: 220 tons
- Hull above water: 30 tons
- On freeboard deck: 167 tons
- Above deck: 233 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29,165 lbs / 13,229 Kg = 96.2 x 8.5 " / 215 mm shells or 4.4 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 3.7 ft / 1.1 m
Roll period: 16.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.62
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak,
a ram bow and a round stern
Block coefficient (normal/deep): 0.523 / 0.531
Length to Beam Ratio: 9.00 : 1
'Natural speed' for length: 26.06 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 11.00 degrees
Stern overhang: -3.28 ft / -1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 28.87 ft / 8.80 m, 26.90 ft / 8.20 m
- Forward deck: 32.00 %, 26.90 ft / 8.20 m, 23.95 ft / 7.30 m
- Aft deck: 39.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Quarter deck: 9.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Average freeboard: 21.23 ft / 6.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 108.2 %
- Above water (accommodation/working, high = better): 126.1 %
Waterplane Area: 31,842 Square feet or 2,958 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 142 lbs/sq ft or 695 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.42
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room

The Rampant class is an expansion of the Xiyon class design, examining the
"opportunity cost" of increasing the armanent to 16x215mm or 12x215
It turns out to be 5,500 tons for the 16x215
but only 4500 tons for the 12x215

8.8
8.2
7.3
4.8

4.23
3.66
7.8
10.91

The main gun requires turrets, but the shells are far greater than a hand loaded gun can manage,
forming a powerful threat to anything in range...
and the shells are large enough to see splashed out to the limits of visual range.

While 330+mm guns fire slowly and need 8 to alternate 4 gun salvos to maintain spotting,
a 215mm gun fires over twice as fast, allowing just 4 barrels to generate the splashes.
This allows mounting the battery both fore and aft.

The 215mm gun fires a heavier shell than the old 230mm, and should have splashes discernable to the Horizon, allowing reliable engagement even when spotter aircraft are not viable.

Secondary on sides has the inner guns raised to fire foreward over the end guns.
Guns are also raised over the main battery fore/aft.

s1 (s3) TT Cat s5
A (a) HangerAC (x) Y
s2 (s4) TT Cat s8

The high cruise speed is to allow it to make high speed cruises through enemy territory, moving 264nm overnight. The expectation also is that when it first encounters a foe it will have a 8-10 knot speed advantage, and while both vessels will increase to maximum revolutions, this vessel will be able to reach maximum speed more rapidly, allowing it to close or depart.

Main Gun : 215L47 Designed 1932-1933
Fires 20% overweight shells from max 215L60
150.66 * 1.2 = 186.792 = 185

Secondary Gun : 130L47 designed 1930
Using overweight shells, has good punch and range.

Armor
A debate between extensive light armor to defeat QF weapons of their intended prey, or thicker AON armor to also allow long range engagements with peers led to broad protection with cruiser-grade armor, leaving a single deck level exposed.

Belt : 165mm , +2.3 above WL to -1.8 Below WL
Inclined outwards 15 degrees
4.1/ cos(15) = 4.2246 = 4.23

TDS rises behind belt to +2.3m
effectively adding 19mm and serving as a splinter barrier

Effective Armor at WL : 165 + 50/2 = 190mm

The Belt is capped by Armor deck

End armor is slopes of protective decks,
75mm slopes forward, 100mm slopes aft.

TDS : 3.8m deep
9mm bulge exterior (minimal splinters)
1m fuel loaded, Thin skinned bulge
Hll metal
2m deep bulge - fuel loaded
20mm STS bulkhead
1.8m deep - Air filled
30mm STS Torpedo Bulkhead, rises behind main belt to seal to armor deck.

Range : 6070 * 1.15 (geared) = 6,980nm

5908t* 1.15 (geared) = 6794t effective tons fuel

Range @ speed
(Not reajusted from the Xiyon)
32 knots : 2,392nm
30.25 knots : 2,839nm (80% power, sustantainable)
26 knots : 4,406nm
22 knots : 6,914nm (Raider speed)
16 knots : 15,250nm (Scout speed)
14 knots : 20,630nm (Fleet speed)

Misc Wt :
140t Const Resv

AD
148t FC
25t LR Radio
25t Searchlight Tower (NF)
25t Hulesmeyer
10t RDF/Jammer

OD
5t - Paravanes
32t - 2 x Quad 21" 4t

Amidships Aircraft handling area
10t : 2x Gunpowder Cat over TT
Typically 1 loaded with the fighters, while the other
1 cycle the scouts
100t : 2 x Fighter Floatplanes, 2x Scout
20t : Hanger

HAW
15t: CO2 Compressor AC
15t : Extra Fire Suppression

HBW
15t : Enhanced Hydrophones.
15t : Extra Pumps.

Decks :
7.3 Forecastle Deck
4.8 Weather Deck,
2.3 Main Deck, top main belt, armored deck
-0.2 2nd deck
-1.8 Bottom Main Belt
-2.7 1st Deck
-7.6 Engineering
-8.61 Double Bottom
-9.60 Keel

TacCovert4 · April 30, 2024, 12:40:46 PM

For the tonnage I don't really think the 6 gun version is balanced at all. The 6 gun ships you see historically, and the ones we've built here, are really compromise designs for minimizing weight. Ex the Arethusa class and the Renown and Repulse. If you did the 6 gun version at 8000t or less, I think that would make a lot more sense.

Kaiser Kirk · April 30, 2024, 12:55:37 PM

I generally agree.
I was curious as to other's opinions.

If I could field an 8x215 ship in 11,000tons, I likely would do it. However that would be 33% more firepower as well

Against the 8000t Parthian Royal Nissean 12x180 series, or the Byzantine 12x191mm equivalent, there is a chance it could stay at range and get enough hits through armor to offset the mission kill hits of the faster 180/191. Say 30rpm vs. 60rpm is substantial. Add in the greater spotting difficulties with 6 guns makes more difference at longer ranges, so the 'to hit' rate would suffer more.

However, it is hard to actually keep range in a 'sweet spot' favoring you and not them, and if the range closed to the point the 180/191s could punch through, all advantages are lost.

For that matter, to take advantage of that range, you need visibility to be very good to start, which
it should not always be. That consideration actually is discussed in the discussion of USS Brooklyn's design evolution of 6" vs 8" utility.

So far, battles have happened to occur in good weather, a side effect of fighting around landing operations. There were some near misses due to night- as it's harder to find each other in the first place. Pity, the open ocean fight between the Romans and Aztecs would have been interesting.

Kaiser Kirk · April 30, 2024, 10:13:30 PM

Quote1932.5 vessels

Slightly soon, oh well.

The discussion on Gross Torpedo Boats reminded me of something I started, but got sidetracked on.
I had decided to copy the Byzantines and convert some of my older destroyers to Torpedo Boats
to do this 'Coastal Destroyer' role that I keep designing ships for. The problem as been I always have more pressing need for the tonnage...and until recently needed the hulls to protect my fleets.

I felt I wanted to have at least 16 DDs/Fleet, with Home and Expeditionary having up to 16 more.
That is 96 needed. At one point a distant goal.

Destroyer Situation
At the end of 1932.0, the Parthians will have 100 of what they regards as "Fleet" Destroyers and Corvettes of 1000-1500 tons. The Corvettes serve in the Expeditionary and Pacific fleet.

This allows them to furnish each of the 4 fleets with at least 16 destroyers.

For the Home and Expeditionary fleets, a 2nd Squadron is provided, for a total of 32 destroyer types capable of ASW. For the Pacific and Atlantic Fleets, half of their 16 are the older Pangajan 1000 tonners.

Each fleet has now been supplied with 4 Marban ASW sloops, slow but bearing a heavy DC loadout to prosecute an ASW contact to destruction while the fleet proceeds.

So I feel my fleets are fairly well screened at this point, especially as the Expeditionary fleet is intended to reinforce the other three, bringing it's 32 along with it.

Future Destroyer/Corvette production will allow more to be tasked with supporting squadrons.

Torpedo Boats
However, the Parthians have 64 older 750ton destroyers.
Some have been turned to Torpedo Boats, but most have reached an age refurbishments are advisable.

The scheme is to turn them into Coastal Torpedo Boats, removing some of the guns to allow fitting AA. Some can fit limited ASW, but most will prioritize torpedoes.

A novel scheme is (1t) to mount series of shrouded colored beacons adjacent to each other, so that ships on station at specific angles can see if they are on station, ahead, or behind station. Flares and rockets will allow signaling. Range & Bearing clocks will be fitted on the aft superstructure and illuminated, so that ships abreast or aft can see.

All of this is an effort to enable these ships to better serve as MTB leaders for small groups of MTBs. Conceptually that would allow them to concentrate the MTB forces as a cohesive unit and saturate the defenses of the opposing fleet, allowing them to drive home the attack on a landing area.

So..expect more refurbishment/refit spam.