[TEC] What is the status of Japanese radar in 1.3?

[LukeFF]

From reading certain posts in the main SH4 forum, it looks like Japanese radar might still need to be tweaked in order to represented realistically (e.g., is their air search radar still picking up surface contacts?) From Combinedfleet.com:

Type 21

Became Operational: August 1943
War Status: used operationally in war
Installed: surface ship
Purpose: anti-air, surface detectionr
Wavelength: 150 cm
Peak Output: 5 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: aircraft, group at 100 km, single at 70 km, surface ship (large) 20 km
Weight: 840 kg
Number Built: unknown, small number
Antennae: dipole array with mat type reflector, send and receive separate use
One source indicates only 1 set of this type built, but same source indicates it was installed on numerous ships. Type 21 first fitted to BB Ise in April 1942, Taiyo, Chuyo and Unyo in January 1943, others prior to August 1943. At least 30-40 sets built and used operationally.


Type 22

Became Operational: September 1944, see notes below
War Status: wide operational use in war
Installed: surface ships, submarines
Purpose: anti-air, surface dectection and gunnery control
Wavelength: 10 cm
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: aircraft, group at 35 km, single at 17 km, surface ship (large) 34.5 km
Weight: surface ships 1320 kg, submarines 2140 kg
Number Built: 300
Antennae: horn type, send and receive separate use
Type 22 fitted to Kazegumo and Makigumo in March 1942, Hamakaze in June 1942, Akigumo and Yugumo in July 1942, Kongo, Haruna and Hyuga in October 1942, Katori, Kashima and Kashii in June 43,Yamato and Musashi in October 1943, other destroyers prior to September 1944. In wide use by mid-to late 1944. Type 22 radard while not designed for gunnery control provided moderately accurate data for this purpose.


Type H-6

Became Operational: August 1942
War Status: used operationally in war
Installed: large flying boats, mid-sized attack planes
Purpose: air search and probably surface search as well
Wavelength: 200 cm
Peak Output: 3 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 100 km, single at 70 km
Weight: 110 kg
Number Built: 2000
Antennae: Yagi type, send and receive common use
This set probably did not come into commun use until 1944, and was mounted in H8K Emily flying boats, G4M2 Betty bombers, and others.

[jhelix70]

the type 13 air search radar is still picking up surface contacts post 1.3. With the new 1.3-compatible AI_sensors.dat tweak file now available, this is easily fixed. Just bork the type 13 by setting its maxrange to 1.

The type 13 was mainly installed on destroyers so it really effects gameplay.

[tater]

Assuming it is still picking up ships:

http://mpgtext.net/subshare/251IJN%2...adar%20fix.rar

That NULLs the type 13 radars on the jap DDs. When they get Type 21s, they have surface search.

tater

[Prientje]

contains TMaru 1.5 the radar fix too ?

if not, is the radar fix compatible with TMaru 1.5 ?

[LukeFF]

Thanks, tater!

[tater]

http://www.subsim.com/radioroom/showthread.php?t=120796

people tested that little mod and confirmed the type13 is working as surface search radar.

The version I posted above forgot to change the gunboats, I will update it shortly.

tater

[THE_MASK]

I noticed that when using silent 3ditor that there is a value for type 13 which is
MinSurface= (maybe this value is the surface area needed for detection) .

[tater]

http://mpgtext.net/subshare/424IJN%2...adar%20fix.rar

Added the gunboats and fishing boats to the list of NULLed type 13s.

tater

[LukeFF]

Thanks for the update, tater.

From reading the records of Japanese Navy ship movements at combinedfleet.com, many of the dates we have for the Type 21 and Type 22 radars are off. I fixed a couple of them, but I'm refraining from uploading it, because my data is fragmentary.

[tater]

Note that I didn't mess withthe dates, I just nulled the type13. Some ships in stock sh4 get type13 in october 42. The rest in sept 43. In reality the later date is more likely for escorts---if it wasn;t functionng as surface search.

Type 21 would have been rare on escorts, and wasn't around til aug 43.

Type 22 was late 44.

Type 22 fitted to Kazegumo and Makigumo in March 1942, Hamakaze in June 1942, Akigumo and Yugumo in July 1942, Kongo, Haruna and Hyuga in October 1942, Katori, Kashima and Kashii in June 43,Yamato and Musashi in October 1943, other destroyers prior to September 1944. In wide use by mid-to late 1944. Type 22 radard while not designed for gunnery control provided moderately accurate data for this purpose.

So a few fleet DDs would have this capability early. For SH4, we have Asashio, which is the stand-in for all the DDs mentioned in that quote. IF we want a special "radar" variant for early war, we could "bungo pete clone" Asashio and add surface radar in march 42. On generic DD pulls, it would mean 1 in 7 would be radar equipped.

[tater]

Crap, I didn't check the sampans.

They all have "FUMO23" radar from day one. WTF.

Looks like a new version might be needed if FUMO also works that way.

Looks like it's german BATTLESHIP radar. LOL

tater

[tater]

Guess I'll expand this to an overall radar fix in the next couple days. I'll end up giving radar earlier to a few big ships (named at combinedfleet), and making sure a few more are radar free (notably the sampans with german fumo23 radar, lol).

I might make a radar variant BP-clone of one DD type to give radar a little early just to mix things up. I'll pick a type usually on fleet duty, not Minekaze or Mutsuki (probably Asashio). I'll double check all the merchants, too.

All that should add up to making night surface attacks much more possible.

tater

[LukeFF]

This is what I've found at combinedfleet.com. Might come in handy:

-Nachi:Type 21 on 22 November 1943
-Isuzu: Type 21 on 19 January 1943; Type 22 on 1 May 1944
-Yamashiro: Type 21 in July 1943; Type 22 on 20 July 1944
-Ashigara: Type 21 on 9 April 1943; Type 22 in late March 1944
-Kimikawa Maru (seaplane tender): Type 21 on 15 August 1943
-Tama: Type 21 on 27 October 1943
-Agano: Type 21 on 3 June 1943
-Abukuma: Type 21 on 3 May 1943; Type 22 on 21 June 1944
-Fuso: Type 21 on 18 July 1943; Type 22 on 2 August 1944
-Oyodo: Type 21 in April 1943; Type 22 on 6 March 1944
-Ise: Type 21 on 25 May 1942; Type 22 in February-March 1943 (Note: this was post-conversion to a battlecarrier)
-Nagara: Type 21 on 20 August 1943; Type 22 on 2 July 1944
-Kumano: Type 21 in early April 1943; Type 22 on 25 June 1944
-Aoba: Type 21 on 1 August 1943; Type 22 on 4 July 1944
-Hyuga: Type 21 and 22 during July-August 1943 refit
-Chikuma: Type 21 on 10 November 1942
-Kaiyo: Type 21 in November 1943
-Mogami: Type 21 on 1 September 1942; Type 22 on 25 June 1944
-Kinu: Type 21 on 2 August 1943
-Myoko: Type 21 on 16 June 1943; Type 22 on 24 June 1944
-Haguro: Type 21 on 16 June 1943; Type 22 on 24 June 1944
-Haruna: Type 21 during Feb.-March 1943 refit; Type 22 on 23 September 1943
-Nagato: Type 21 on 31 May 1943; Type 22 on 27 June 1944
-Kongo: Type 21 on 1 August 1942; Type 22 on 30 June 1944
-Yamato: Type 21 on 12 July 1943; Type 22 on 25 February 1944
-Senai: Type 21 on 5 May 1943
-Musashi: Type 21 during September 1942; Type 22 on 1 July 1943
-Kitakami: Type 22 on 14 August 1944
-Maya: Type 22 on 21 December 1943
-Tone: Type 21 on 21 February 1943; Type 22 late June-early July 1944
-Shokaku: Type 21 post-Midway - pre-Battle of Santa Cruz (June 1942?)
-Yahagi: Type 22 in Early July 1944
-Yubari: Type 22 in September 1943
-Atago: Type 22 on 15 November 1943
-Takao: Type 22 on 15 November 1943
-CH Subchasers: Type 22 in September 1944

Phew!

[tater]

Looks like I might need a 2.0

Actually, the problem is that at soem level it's probably best to pick an average date since so many ships got radar in a haphazard way.

Look at Mushashi vs Yamato, for example.

If you can come up with a good set of typical dates by ship class, I'll certainly add it in! Another thing is that I really don't know anything about how the 21 is modeled vs the 22.

tater

[THE_MASK]

Originally Posted by tater

I really don't know anything about how the 21 is modeled vs the 22.

tater

Type 21 MaxRange=14000
Type 22 MaxRange=18000