ST radar

[Gibus]

Hello,
I am looking for information about the ST radar:
- Specifications
- Date of commissioning
- What type of submarines

Thank you.
Google France we find that what is on the trap car. :hmmm:

Gibus

[Jan Kyster]

ST-radar? :hmmm:

That's a new one to me?

Here's the manual for US WWII radars: http://www.hnsa.org/doc/radar/index.htm



A google of ST-radar: http://www.google.com/search?q=st-radar&sourceid=ie7&rls=com.microsoft:da:IE-SearchBox&ie=&oe=

A Stratosphere Trophosphere radar...? Definitely not on any boat (yet), I'm afraid! :D

[Bubblehead1980]

ST-radar? :hmmm:

That's a new one to me?

Here's the manual for US WWII radars: http://www.hnsa.org/doc/radar/index.htm



A google of ST-radar: http://www.google.com/search?q=st-radar&sourceid=ie7&rls=com.microsoft:da:IE-SearchBox&ie=&oe=

A Stratosphere Trophosphere radar...? Definitely not on any boat (yet), I'm afraid! :D


No, ST was a small radar attatched the attack periscope usually in RL.ST had a short range but enabled quick range reading of target.Came into service in late 44, believe it came standard on Tench class subs, Balaos and Gatos were outfitted with it in 1945.

The TMO mod has ST radar for Tench class submarines on the observation scope.Maybe one day ducimus will make it an upgrade for all subs in late war, that would be ideal.

[WernherVonTrapp]

Never heard of ST Radar. Doesn't even appear in my WWII radar book. Unless, of course, it is known by a more familiar alias.:hmmm:

[Bubblehead1980]

Never heard of ST Radar. Doesn't even appear in my WWII radar book. Unless, of course, it is known by a more familiar alias.:hmmm:


USS Barb had one in 1945.....Fluckey managed to get one as mentioned in his book, used it well.O Kane tried to get one but couldnt as they were new and in short supply in Oct 1944before Tang's last patrol

[fred8615]

Here's the info from my Info Boxes mod. The only thing I added was the stuff in Notes: and Info:


ID= UpackSTRadar
NameDisplayable= ST Radar
FunctionalType= UpFTypeSensorPeriscope
UpgradePackSlotType= AdvPeriscope
Type=NULL
UnitUpgradePackIntervalOptionCurrent= NULL, NULL, 0
UnitUpgradePackIntervalOptions1=1944-07-01, 1944-12-31, 3000
UnitUpgradePackIntervalOptions2=1945-01-01, NULL, 1500
IDLinkUpgradePackElements= ObsPeriscopeST
Info=Maximum Detection Range for:|Battleships - <b>5 miles</b>|Cruisers - <b>5 miles</b>|Destroyers - <b>3 miles</b>|Submarine - <b>3 miles</b>
Notes=Perisocope mounted for tracking and attacking targets while submerged and in very low visibility. Has provisions for IFF (Identification, Friend or Foe) capability.

[WernherVonTrapp]

USS Barb had one in 1945.....Fluckey managed to get one as mentioned in his book, used it well.O Kane tried to get one but couldnt as they were new and in short supply in Oct 1944before Tang's last patrolPerhaps it was also known by an SCR type? There were a lot of radar systems that went by more than one name/acronym depending on what branch of service was using it, and for what purpose.
I did find a reference to it on the USS Pampanito website. Now I gotta find out more about this. Either it isn't in my book or, just isn't in the index and goes by some different name. Too many pages to flip through again. Anyone have any good reference points to start from?
Ah, OK, just learned a little more about it. It was incorporated into the SV radar system and used a morse code key to activate it. The code key, I believe, was located on the periscope and it sent out a short radar pulse. I'm still checking on it though.

[Takao]

Specs for the ST radar can be found here: http://www.maritime.org/radio-st.htm

Norman Friedman's "US Submarines through 1945 gives production starting in July 1944, by March, 1945, 139 sets had be delivered and 95 sets installed. IIRC, the set was first installed November, 1944.

The USS Lionfish had an ST set on her first war patrol, March 19, 1945.
http://www.battleshipcove.org/ss298-warpatrol1.htm

You could also try a forum search, the ST was mentioned several times 2007-08.

[Platapus]

To help you with your research, the type of periscope the ST was mounted on was called

93KN-36/3.75

You could try researching on that term.

[Gibus]

Specs for the ST radar can be found here:

The USS Lionfish had an ST set on her first war patrol, March 19, 1945.

Excellent. Thank you for all response.

[WernherVonTrapp]

To help you with your research, the type of periscope the ST was mounted on was called

93KN-36/3.75

You could try researching on that term.Ah, thanks mate.:yeah::salute:

[DaveyJ576]

ST radar was a significant tactical advance for the boats. The transmitter was very small and was incorporated into the head of the #2 (Observation) periscope. When activated, the captain would make a very brief sweep of the target with the periscope. The ST was tied into the PPI scope of the regular SJ radar and the results of the sweep showed up there, the range read off by the radar operator. After that brief sweep the ST would be shut off.

The other methods of determining a range to the target was the stadimeter built into the periscopes, single ping from the active sonar, and the good ol' Mk 1 Mod 0 eyeball. The stadimeter was only as accurate as the information you had on the mast-head height of the target. If this info was inaccurate, or you didn't have it and had to guess, the range could contain a significant error factor. The single ping from the sonar tended to give away your presence to escorts. Guessing the range by just looking at the target would obviously be your last resort.

The advantages of the ST was a hyper-accurate range and the fact that you could get it quickly and with only the periscope exposed above the waves.

Unfortunately, it was a late war development and deployment to the fleet was spotty until 1945. Many of the CO's asked for it but were unable to obtain it until the war was almost over.

[MaddogK]

The year 1944 brought two new radars. SV replaced the early SD giving directional long range air search capability out to 30 miles or more. To work with the SJ, as part of new night periscopes, a keyable ST radar antenna was built in. This small directional antenna pointed where the periscope looked. By using a simple morse code key, the Figure SEQ Figure \* ARABIC 34 XO Dick O'Kane on Wahoo's periscope radar operator could transmit a brief pulse and still remain undetected by the IJNs rudimentary radar detectors[34]. Throughout the war American radar proved vastly superior to Japanese radar or detection capabilities[35]. Once radar was actually fielded by Japan, Ned Beach reports being able to use that against the Japanese. He reports of tracking a Japanese I-class submarine at night by the interference the Japanese radar caused on the American set. By the time, the I boat got within its radar range, the solution was set and a torpedo was on the way.[36] Similarly, Batfish sank three IJN submarines in three nights by using the same method.[37]

[WernherVonTrapp]

The year 1944 brought two new radars. SV replaced the early SD giving directional long range air search capability out to 30 miles or more. To work with the SJ, as part of new night periscopes, a keyable ST radar antenna was built in. This small directional antenna pointed where the periscope looked. By using a simple morse code key, the Figure SEQ Figure \* ARABIC 34 XO Dick O'Kane on Wahoo's periscope radar operator could transmit a brief pulse and still remain undetected by the IJNs rudimentary radar detectors[34]. Throughout the war American radar proved vastly superior to Japanese radar or detection capabilities[35]. Once radar was actually fielded by Japan, Ned Beach reports being able to use that against the Japanese. He reports of tracking a Japanese I-class submarine at night by the interference the Japanese radar caused on the American set. By the time, the I boat got within its radar range, the solution was set and a torpedo was on the way.[36] Similarly, Batfish sank three IJN submarines in three nights by using the same method.[37]I read the very same thing during my initial Google of the subject.;)