Consolidated: Total Conversion Pack

[RedConkristador]

Could you model the ARS rescue and salvage ships like Tategami from an ARD?
Flotation damage only repaired, can only work on one ship at a time.

Can Japan have ship withdrawals?
Then you could model the Bordeaux runs, must sail to on map location, no enemy air superiority, minimum damage.

1. Thats a good idea. I've been debating how to do model them.
2. Not sure if Japan can have ship withdrawals. I'll check

[Seacat54]

Type-NLT tankers have an conversion option to Ditmarchen AO, I assume that is not intended.

Type-NLT AO and Type-1 TL AO classes are missing upgrade options, compared to the Shiroteko-class AO that has two possible upgrades with the last one gaining a radar.

[RedConkristador]

Type-NLT tankers have an conversion option to Ditmarchen AO, I assume that is not intended.

Type-NLT AO and Type-1 TL AO classes are missing upgrade options, compared to the Shiroteko-class AO that has two possible upgrades with the last one gaining a radar.

Thanks. Updated with changes.

[Seacat54]

Type-NLT tankers have an conversion option to Ditmarchen AO, I assume that is not intended.

Type-NLT AO and Type-1 TL AO classes are missing upgrade options, compared to the Shiroteko-class AO that has two possible upgrades with the last one gaining a radar.

Thanks. Updated with changes.

Happy to help, I like the design of this mod and NGT very much.

Is there anything specific you want people to look for when playing?

[Seacat54]

Tsukushi-class could be more accurately represented by Shimushu-class without DC and carrying a Glen if possible.

In game the G8N1 Renzan is a 2 engine aircaft with service rating 5,I assume not intended.

[Seacat54]

These tankers are missing from the Allied database, can either add them to that side or give them as incentives to Japan for those locations.

TK Choran Maru ex-Ruthenia (in Japanese database) was captured in Singapore,
TK Enoshima Maru ex-Ebonol(in Japanese database) was refloated in Hong Kong,
TK Hosei Maru ex-Poseidon (in Japanese database) was refloated in Tjilatjap.
TK Yosei Maru ex-Josefina (in Japanese database) was refloated in Soerabaja.

[Seacat54]

If the intent is to give options to the Modified Circle 5 Plan that came after Midway then allowing the second Ōyodo-class CL Niyodo should be an option, she was to be built in the same slipway after Ōyodo was lauched.

Same with the second Ibuki CA, likely name was Kurama and the Ikoma-class CV would have been Kaimon instead.
https://en.wikipedia.org/wiki/Ibuki-cla ... ed_cruiser

Major limitation of the engine is that Yamato and Musashi take a lot of yard space at game start even if they had been launched.

I understand it is an abstraction but partly it is not, you could build 2 Unryū CVs where you build 1 Yamato BB, at least that was the plan in Yokosuka when they considered cancelling Shinano.

[RedConkristador]

Type-NLT tankers have an conversion option to Ditmarchen AO, I assume that is not intended.

Type-NLT AO and Type-1 TL AO classes are missing upgrade options, compared to the Shiroteko-class AO that has two possible upgrades with the last one gaining a radar.

Thanks. Updated with changes.

Happy to help, I like the design of this mod and NGT very much.

Is there anything specific you want people to look for when playing?

Thanks for the support! To answer your 'intent' question below, it's to provide (1) as much detailed accuracy as possible within the engine's abstractions/limitations, and (2) realistic options to shape the military forces; e.g. choices that were historically considered. As far as things to look for - nothing specific, every bit helps.

[Seacat54]

HMS Li Wo is in the game but her captain Thomas Wilkinson,VC is not.

https://victoriacrossonline.co.uk/thoma ... n-1942-vc/

https://historynet.com/li-wos-last-fight/

[Seacat54]

Akashi-class repair ships Mihara and Momotori where cancelled August 1943 so could well be an option.

[Seacat54]

CS Mizuho should have floatplane capacity of 24.

CS Nisshin had 12 floatplanes and 6x14 cm/50 3rd Year Type naval guns.

[Seacat54]

Surprised you went so far with Yamatos as give her at the historical date, I was thinking you would damage her and Musashi to be fitted out or something.
¨
Maybe lower the crew experience? Shinano has 65/50, that seems about right.
I am a bit worried about allied reactions, Force Z aint what is used to be for sure.

EDIT. With the old BBs at 60/65 =50/55 for new BBs would be logical?

[Seacat54]

3. The Southern Army Assuming Command and the Employment
of Its Air Arm

The Chain of Command of the Air Arm of the Southern Army

The Southern Army Headquarters Was Provided with the Trappings of an Air Corps
Headquarters

As mentioned previously, for committing the main force of the Army Air Service to the southern operation it was, in view of the vast operational front, natural to assume that two or more
numbered air forces would be necessary.
As the strategic value of the air arm increased, the tendency in military aviation at that
time was to employ it in a way as concentrated as possible so as to bring its special qualities
into full play. In order to employ two or more numbered air forces in a unified way, it was
natural to set up a headquarters [on the level of] an air corps (later: air army) as the higherranking headquarters. However, at that time, there was only one air corps headquarters,
which was in Manchuria, and in terms of [the Army’s] policy against the North, it was impossible to transfer this headquarters [to the South]. Moreover, the number of commanders
and staff officers familiar with aviation was too small to establish a new air corps headquarters, let alone that it usually required some time before a newly established headquarters
could fully function.
In the end, it was decided to adjust the composition of the Southern Army headquarters
so that it could also serve as an air corps headquarters. The main points were to put in a [second] vice chief of staff exclusively in charge of the air arm, and set up an independent aviation
section, which would comprehensively deal with the operations, intelligence, rear [support]
and facilities related to the air arm. The main purpose was to employ the air arm in a way
that suited its specific nature.(39, 91)
A Southern Army headquarters with an aviation specific function had already been in
preparation since October. On 5 November, General Terauchi Hisaichi was personally appointed commander in chief by the Emperor, and the formation of his headquarters was completed on the 13th of the month.


The Invasion of the South: Army Air Force Operations, & the Invasion of Northern & Central Sumatra - 2021
by Willem G.J. Remmelink

https://archive.org/details/willem-g.-j ... perations-

[Seacat54]

CVL Ryūhō started her conversion December 20 1941, logically she should be treated as the optional CS conversions, just a little faster.
On a personal note I never build her and see more value in an AS and I often dont build the Yamatos but now I will and that is more historical than what the game now forces you to do.

Ryūhō in game completion date 28 November 1942 is her historical delayed launch date caused by the Doolitle Raid, she was nearly completed in April 18 when hit.

So the in game yard queue situation is post April 1942 Doolittle Raid and post Midway September 1942 Modified Circle 5 Plan.
The game build queue should combine these historical plans from 1941 to 42 and let the player and strategic situation decide what is needed or possible.
Basically more plans and ships than possible to build as it historically was.


Removing Yamato and Ryūhō in December 1941 frees up 280 NavSY points.

I dont know if the NavSY should be damaged and repaired for game balance or allowed to be used.


References:
Japanese Cruisers of the Pacific War by Eric Lacroix and Linton Wells
Kaigun: Strategy, Tactics, and Technology in the Imperial Japanese Navy, 1887-1941 by David Evans
The Imperial Japanese Navy by A.J. Watts and B.G. Gordon
https://www.generalstaff.org/WW2/PEDIA/ ... _Plans.htm

第五次海軍軍備補充計画 (Dai-Go-Ji Kaigun Gunbi Hojū Keikaku) or Fifth Naval Armaments Supplement Program
マル⑤計画 (Maru 5 Keikaku) or Circle Five Program
May 1941

The Navy Ministry expected that it couldn't be started until 1942, and that it would take nine years (until 1950) to finish all 159 units in the plan.
1 x Yamato Battleship (No. 797)
2 x A-150 “Super Yamato” Battleships (No 798 and No. 799)
2 x Type A Battlecruisers (Nos 795 to 796)
1 x Unryu Aircraft Carrier (No. 800)
2 x Kai-Taiho (G-14) Aircraft Carriers (No 801 and No 802)
1 x 11,000 ton Seaplane Tender (No. 809)
1 x Kai-Wakataka Netlayer (No. 819)
1 x Irako Supply Tanker (No. 845)
5 x Kai-Agano (C-44) Type B Cruisers (Nos 810 to 814)
1 x 6,800 ton Icebreaker (No. 846)
1 x Tsukushi Survey Ship (No. 847)
1 x Hashidate Gunboat (No. 867)
1 x I-400 Class Submarine (No. 714)
2 x I-9 Cruiser Submarines (Type A) (No. 700 and No. 701)
8 x I-15 Cruiser Submarines (Type B) (Nos. 702 to 709)
4 x I-46 Submarines (Nos. 710 to 713)
3 x I-351 Submarines (Nos. 730 to 732)
9 x RO-35 Submarines (Nos. 715 to 723)
10 x I-176 Submarines (Unknown Numbers)
9 x RO-100 Submarines (Unknown Numbers)
16 x Kai-Shimakaze Destroyers (No. 733 to 748)
16 x Kai-Akitsuki Destroyers (No. 770 to 785)
4 x Shumushu Escorts (Type A) (No. 790 to 793)
6 x 3,300 ton Seaplane Tenders (No. 803 to 808)
4 x Shokatu Escort Cruisers (No 815 to 818)
10 x No.19 Minesweepers (No. 820 to 829)
2 x Akashi Repair Ships (No. 840 and No. 841)
3 x Improved Kazahaya Supply Tankers (No. 842 to 844)
8 x Ajiro Minelayers (No. 850 to 857)
2 x Modified Nisshin Seaplane Carrier (No. 863 and No. 864)
2 x Modified Tsurugizaki Submarine Depot Ships (No. 865 and No. 866)
2 x Sumida Gunboats (No. 868 and No. 869)
9 x No.13 (CH-13) Subchasers (No. 870 to 878)
9 x 700 ton CH-60 Subchasers (No. 879 to 887)
2 x Tsugaru Minelayers

第六次海軍軍備補充計画 (Dai-Roku-Ji Kaigun Gunbi Hojū Keikaku) or Sixth Naval Armaments Supplement Program
マル⑥計画 (Maru 6 Keikaku) or Circle Six Program
Not much is known about this plan. It was abandoned at a very early stage in planning. The January 1941 Proposal had the following:

4 x Super Type A Cruisers
8 x Type A Cruisers (CAs)
1 x Type B Cruiser (CL)
1 x Type C Cruiser


1941 Wartime Construction Program
Construction Priority List (in order of priority)
1. ) Aircraft
2. ) Submarines
3. ) Aircraft Carriers/Escort Vessels
4. ) Destroyers
5. ) Transports
6. ) Cruisers
7. ) Battleships
8. ) Battlecruisers
Standardization:
Existing designs were to be standardized for mass production, with slight detail improvements.

Cruisers: Suzuya (Modified Mogami class)

The 1941 Wartime Construction Program consisted of the following two programs:

Wartime Urgent Warship-Construction Program
マル級計画 (Maru Kyū Keikaku) or Circle Urgent Program
21 September 1941
Note: Decided upon by the Naval General Staff on 28 July 1941, but not activated until 21 September 1941.

1 x Unryu Aircraft Carrier (No. 302)
2 x Ibuki Heavy Cruisers (No. 300 (Ibuki) and No. 301)
30 x Etorofu Escort Ships (Type Mod-A) (No. 310 to 339) (many were later reordered/converted to Mikura/Hiburi/Ukuru Type B Escort Ships)
16 x Yugumo Destroyers (Type A) (No. 340 to 355)
10 x Akizuki Destroyers (Type B) (No. 360 to 369)
6 x I-40 Cruiser Submarines (Type B) (No. 370 to 375)
3 x I-16 Cruiser Submarines (Type C) (No. 376 to 378)
3 x S49B Cruiser Submarine (Type C) (No. 379 to 381) (All Cancelled)
12 x Ro-35 Medium Submarines (No. 385 to 396)
9 x Ro-100 Medium Submarines (No. 400 to 408)
28 x MSC-19 Minesweepers (No. 410 to 437)
20 x No.13 Subchasers (No. 440 to 459)
14 x Ajiro Minelayers (No. 460 to 473)
16 x AMS-1 Auxiliary Minesweepers (No. 480 to 495)
100 x APC-1 (CHa-1) Auxiliary Subchasers (No. 500 to 599)
1 x PT-10 Torpedo Boat (No. 600)
17 x PT-11 Torpedo Boats (No. 601 to 617)

Additional Naval Armaments Supplement Program
マル追計画 (Maru Tsui Keikaku) or Circle Additional Program
November 1941

1 x I-12 Cruiser Submarine (Type A) (No. 620)
1 x I-13 Cruiser Submarine (Type A) (No. 621)
7 x I-54 Cruiser Submarines (Type B) (No. 627, No. 629, No 631, No 633, No 634, No 635, and No 636)
5 x I-52 Cruiser Submarines (Type C) (No. 625, No. 626, No. 628, No. 630, and No. 632)
15 x Ro-35 Medium Submarines (No. 640 to 654)
3 x I-351 Cargo/Tanker Submarines (No. 655 to 657)
1 x Hakachi Target Ship (No. 660)

1942 Warship Construction Replenishment Program (21 September 1941)
Notes: Combined the earlier Fifth and Sixth Replenishment Programs (Circle Five and Six) into a single program, consisting of two parts:
Part One (Mainly the original Circle Five program). Construction to be started in 1942 and finished before 1 April 1948 (the end of Japanese Fiscal Year 1947).
Part Two (Mainly the original Circle Six Program). No decision was made on this program.

Wartime Warship Construction Replenishment Program
改マル⑤計画 (Kai-Maru 5 Keikaku) or Modified Circle Five Program
21 September 1942
Notes: Replaced the earlier Circle Five program, which was canceled.

15 x Unryu Aircraft Carriers (Nos 5001 to 5015)
5 x Kai-Taiho (G-15) Aircraft Carriers (Nos 5021 to 5025)
2 x Kai-Agano (C-44) Type B Cruisers (No. 5037 and No. 5038)
23 x Yamatsuki Destroyers (No. 5061 to 5083)
8 x Yasmasame Destroyers (No. 5041 to 5048)
42 x Matsu Destroyers (Type D) (No. 5481 to 5522)
34 x Yaku Escorts (No. 5251 to 5284)
30 x No.60 Subchasers (No. 5341 to 5370)
18 x No.28 MTBs (No. 5441 to 5458)
14 x I-54 Submarines (No. 5101 to 5114)
18 x Improved I-54 Submarines (No. 5115 to 5155)
15 x I-52 Submarines (No. 5141 to 5155)
18 x I-400 Submarines (No. 5231 to 5248)
6 x I-14 Submarines (No. 5091 to 5096)
25 x Improved I-52 Submarines (No. 5156 to 5180)
42 x RO-35 Submarines (No. 5181 to 5223)
11 x I-361 Submarines (Type D) (No. 5461 to 5471)
3 x Shilo Submarine Depot Ships (No. 5034 to 5036)
3 x Akitsushima Seaplane Tenders (No. 5031 to 5033)
5 x Ohama Target Ships (No. 5411 to 5415)
1 x Asadori Netlayer (No. 5039)
12 x Arashima Minelayers (No. 5421 to 5432)
36 x No.53 Minesweepers (No. 5301 to 5336)
7 x Kiyozaki Refrigerated Ships (No. 5401 to 5407)
1 x Kusunii Supply Ship (No. 5408)
1 x Miho Survey Ship (No. 5418)
1 x Esau Icebreaker (No. 5419)
2 x Mikara Repair Ships (No. 5416 and No. 5417)
7 x Hayasui Supply Tankers (No. 5381 to 5387)
8 x Takano Supply Tankers (No. 5388 to 5395)
2 x Hario Supply Ships (No. 5409 and No. 5410)

Wartime Naval Armaments Supplement Program
マル戦計画 (Maru Sen Keikaku) or Circle War Program
1943-44 Program

100 x No.151 Auxiliary Subchaser (No. 2001 to 2100)
280 x Type B-1 Patrol Boats (No. 2121 to 2400)
132 x No.1 Escort (No.2401 to 2532)
143 x No.2 Escort (No. 2701 to 2843)
46 x No.1 Transports (No. 2901 to 2946)
1 x I-372 Submarine (No. 2961)
6 x I-373 Submarines (No. 2962 to 2967)
73 x No.101 LSTs (No. 1501 to 1603)
60 x No.101 Auxiliary Patrol Boat (No. 1701 to 1760)
9 x Kamishima Minelayers (No. 1801 to 1809)
2 x Minoo Minelayers (No. 1821 and No. 1822)
20 x No.1 Auxiliary Patrol Boats (No. 1851 to 1870)
23 x I-201 Submarines (No. 4501 to 4532)
12 x HA-101 Submarines (No. 4601 to 4612)
21 x Inagi Escorts (No. 4701 to 4721)
20 x Modified Matsu Destroyers (No. 4801 to 4820)
2 x Hario Supply Tankers (No. 4901 and No. 4902)
2 x Inatori Supply Tankers (No. 4903 and No. 4904)
79 x HA-201 Submarines (No. 4911 to 4989)

1944-45 War Program
Notes: Projected, but none were ever ordered, and thus not assigned numbers.
79 x Type B Escorts
60 x Type D Escorts
10 x HA-201 Submarines
20 x No.151 Subchasers
4 x No.1 Transports
92 x I-361 Submarines
11 x Kamishima Minelayers
13 x Cargo Submarines
168 x No.1 Escorts
60 x No.2 Escorts
88 x HA-101 Submarines
140 x I-373 Submarines
76 x I-201 Submarines
40 x No.101 Auxiliary Patrol Boats

Summary:
367 x Escorts
20 x Subchasers
40 x Auxiliary Patrol Boats
419 x Submarines
11 x Minelayers
4 x Transports

Miscellaneous Notes:
The Taiho Class Aircraft Carriers were originally planned to have the following air group as completed:

24 x A7M Reppui (Sam)
25 x B7A2 Ryusei (Grace)
4 x C6N1 Saiun (Myrt)

[Seacat54]

If you damage the at start NavSY and Kure and Yokohama to compensate for removing Yamato 233 + Ryūhō 47= 280 from the queue that is 134+95=229 so frees only 51 NavSY points at start.

The need to build up Tokyo to 50 RepSY to do conversions balances it also.

[Seacat54]

Singapore RepSY is too low, should be increased but start partly damaged.

The floating dry docks should arrive in Singapore and become strategic targets for the Allied.



On 15 February 1938, at the official opening of the Royal Navy Base at Seletar, Singapore, the King George VI (KG6) graving dock (drydock) also was unveiled. She was the largest dry dock in the world at almost 1,000 feet in length, 130-feet (40 m) wide and 35-feet (11 m) deep. KG6 could accommodate the British Royal Navy Dreadnought class battleships, the largest capital naval ship of the time for resupply or repairs.
KG6 was one of the naval base’s two main dry docks, the other being the 50,000-ton concrete Admiralty IX floating dry dock, anchored in the Straits of Johore. The Admiralty IX completed by Swan Hunter in England in 1929, the third-largest dry dock in the world at the time. [1]

The British also purchased the 5,000 ton Admiralty X floating dry dock from the Dutch East Indies in November, 1939. Built in the Netherlands 1924 and moved to the Naval Base Singapore, this smaller drydock was to be used by cruisers and destroyers, so that the larger drydocks would be available for any capital ships.

With the impending capture of Singapore by the Imperial Japanese Army in 1942, the King George VI dry dock gates were blown off and machinery destroyed. The dock was subsequently repaired and used throughout the war. There was also a floating crane nearby.

On 24 February 1942, the former Royal Navy Base at Seletar was taken over by the Imperial Japanese Navy. Both floating dry docks had been scuttled by the British, but were raised and re-used by the Japanese. The IJN No. 101 Naval Construction and Repair Departmentt was established under Rear Admiral/Eng, (later Vice Admiral) Akasaka Isao (21) who was appointed as its prospective Director on 15 December 1941 and then served from February 1942 to 1 May 1943. The No. 101 Naval Construction and Repair Department had a staff of officers (engineers, technical and administrative staff), naval ratings and uniformed technicians.

https://combinedfleet.com/IJN%20No.%201 ... gapore.htm




Comments: Built in 7 sections for the Admiralty & to be based at their Singapore Dockyard
Capable of lifting 55,000 tons (disp) vessels such as the largest battleships of the day

1942: Scuttled before the fall of Singapore to Japanese forces
Raised by the Japanese for their own use at Singapore

01/02/1945: Bombed and sunk by Allied aeroplanes

https://www.tynebuiltships.co.uk/S-Ship ... k1928.html

[RedConkristador]

Thanks for all the info. I'll add these to my development queue for the next update. I'm still exploring different ship conversion options - and there's lots of space in the editor files still for more ships and ship classes.

[Seacat54]

Thanks for all the info. I'll add these to my development queue for the next update. I'm still exploring different ship conversion options - and there's lots of space in the editor files still for more ships and ship classes.

Happy to pitch in, with naval builds you enter dangerous waters regarding game balance.

I think a tool with graphic representation of the available naval yards and what was there at what time historically would help balance it with the game engine limitations.

Similar with the repair yards, they partly overlap, NavSY captured by allies convert to RepSY, those allied ports that historically where captured by Japan only have RepSY.
I am trying to find the total historical capacity of Singapore dry docks, at Sorebaja it was little over 20.000 ton and the RepSY is 20..

Hong Kong seems close but could be little over, the biggest dry dock was civilian, little over 10.000 tons, but was used by the Royal Navy and naturally IJN.
The largest military dry dock in Hong Kong was a bit smaller so a bit under 10.000 tons.

[Seacat54]

Chitose-class seaplane carriers should allow the 2nd Mitsubishi F1M Pete equipped air group to upgrade to Nakajima A6M2-N Rufe, Chitose carried 16 Rufes to Midway.


Kamikawa Maru-class (auxiliary seaplane carriers ACS) should have their capacity increased to 12.
They could actually operate +18 F1M but to prevent filling them with Jakes, a game engine limitation.
They could transport around 24 planes as AKV

They should all have two air groups with the Mitsubishi F1M Pete equipped air group open to upgrade to Nakajima A6M2-N Rufe.
If game balance requires then one group with open to upgrades but it does feel gamey to resize and split Kamikawa Maru groups and sending them to the others.

Kamikawa Maru was not the only one to carry and operate Nakajima A6M2-N Rufe, they all did except Hirokawa Maru that is in the game database as Yusen-S class AK, she was designed to have the same conversion available.

At game start Kunikawa Maru was not yet converted but it was pretty fast, 14 July 1942 to 23 August 1942.
Kunikawa and Hirokawa Maru should be optional as conversions with shell air groups arriving when finished.

No idea why most of the seaplane carriers lack the float fighter option at present, that was the trend prior to Midway, after that it was clearly a resource issue worsened by the attrition in the Solomons.




KAMIKAWA MARU (Japanese seaplane tender, 1936) Anchored off Amoy, China, 16 July 1939, with a deck load of KAWANISHI E17K-2 and NAKAJIMA E8N floatplanes both forward and aft. I can count at least 14 aircraft. This vessel, the first of the class converted to a seaplane carrier, saw extensive service in Chinese waters in 1938 to 1940, with her planes often bombing and strafing key Chinese positions.



Notably, many of the IJN’s carrier commanders and admirals learned their trade on these special seaplane carriers to include RADMs Ando Shigeaki, Hattori Katsugi, Shinoda Tarohachi, Matsuda Takatomo, Hara Seitaro, and Yokokawa Ichihei; VADMs Arima Masafumi, Yamada Michiyuki, and Omori Sentaro.


Maru Floatplane Carriers
https://laststandonzombieisland.com/202 ... -carriers/



Japanese Auxiliary Seaplane Tenders: Tabular Records of Movement (TROMs)
https://www.combinedfleet.com/Suijoki-Bokan%21.htm