[ARC5] US Submarine ELINT WWII, (was British ZB......?)

[Bill KA8VIT]

Aboard the USS COD SS-224 a Gato Class Fleet Submarine we are/were equipped with SD radar, then later, the SJ radar was added, and then, still later, we were equipped with ST radar with the head above the optic lenses in the search periscope.

We are also equipped with the AN/APR-1 and the AN/SPA-1 radar countermeasures receivers.

73 - Bill KA8VIT / W8COD


>     On 04/07/2021 6:11 PM Tim <timsamm at gmail.com> wrote:
> 
> 
>     Hue said: But by US standards Japanese radars were rudimentary, not widely deployed, and also ( without referring to my docs ) I believe mostly operated on lower frequency bands than US. It just seems rather less likely or certainly, uncommon
> 
>     [snip]
>     --------------------------------
>     Generally true.....US Subs used the AN/APR-1 (and -4 presumably) hunting IJN ships/submarines in the Pacific in WWII.  ..In researching the AN/APR-1 that I am playing with I learned that the USS Batfish sank an IJN submarine after the APR-1 detected its 150 mc radar. Those IJN subs also carried 3 Gc radars, at least late-war.  The APR-1 (SPR-1) could detect both radar band emissions. I would expect many other intercepts were made with this gear.  It was a good passive system and the APR-4 variant was used well into the Vietnam war era aboard EB-66 aircraft, probably others.
>     Some details if you're bored:  http://www.n6cc.com/an-apr-1-apr-4-radar-comm-surveillance-receiver/
> 
>     Tim
>     N6CC
> 
> 
> 


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Bill Chaikin, KA8VIT
USS COD Amateur Radio Club - W8COD
WW2 Submarine USS COD SS-224 (NECO)

ka8vit at ka8vit.com
http://ka8vit.com
http://www.usscod.org
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