[WernherVonTrapp]

Originally Posted by 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]

I read the very same thing during my initial Google of the subject.