The Japanese were able to home in on the SD (a non-directional air search radar), so most boats would only use it periodically. The SJ surface search radar outclassed anything Japan had at that time and was far more ubiquitous .Our ships could detect theirs at a far greater range.
Don't know a lot about the Germans, but I do know that they had some kind of device that was supposed to protect U-boats that the Allies were homing in on.
The Germans had a system called Metox, that could detect early British radar systems, but did itself emit some signals. British attempts to home in on those signals went nowhere, as it was more a case of "leaky electrics" than anything else.
However, the British then upgraded their radar, which now operated on a different wavelength that Metox could not detect, leading to U-boats being attacked when surfaced with no warning. Combined with a captured British bomber pilot who "revealed" during interrogation that the British had a system to track Metox emissions (which was totally made up), the Kriegsmarine discontinued its use.
From what my shitty merchant marine radar training taught me, radar is detectable at twice the range you are able to get good data back. Height above horizon helps, so the same radar on a cruiser will see twice as far as that of a SS. Secondarily the Germans knew about radar but they were behind the British, where we got the tech from. And they shared nearly nothing with Japan who used spotlights for night fighting.
So 1. 15nm detection range from a sub. 2. Knowing what to listen for on what frequency.and 3. Making use of that information.
The Japanese definitely detected the American radar on occasion. First example that comes to mind is when Sealion came across Yamato and Kongō after Leyte: Yamato detected the American radar and put out the alert that there was a surfaced submarine nearby. Didn’t save Kongō, which not only was the only Japanese capital ship lost to submarine in WWII, but had the audio of the entire engagement recorded inside the conning tower: both torpedo hits are clear in Part 2 (though the audio quality of the oiler attack is much better): https://maritime.org/sound/#sealion
While there were fewer US submarines in the Atlantic, Allied anti-submarine aircraft were regularly equipped with radar, and the Germans developed detection systems to warn the U-boats. This article on uboat.net gives a decent overview of the various types: https://www.uboat.net/technical/detectors.htm
The Japanese were able to home in on the SD (a non-directional air search radar), so most boats would only use it periodically. The SJ surface search radar outclassed anything Japan had at that time and was far more ubiquitous .Our ships could detect theirs at a far greater range.
Don't know a lot about the Germans, but I do know that they had some kind of device that was supposed to protect U-boats that the Allies were homing in on.
The Germans had a system called Metox, that could detect early British radar systems, but did itself emit some signals. British attempts to home in on those signals went nowhere, as it was more a case of "leaky electrics" than anything else.
However, the British then upgraded their radar, which now operated on a different wavelength that Metox could not detect, leading to U-boats being attacked when surfaced with no warning. Combined with a captured British bomber pilot who "revealed" during interrogation that the British had a system to track Metox emissions (which was totally made up), the Kriegsmarine discontinued its use.
Thank you.
From what my shitty merchant marine radar training taught me, radar is detectable at twice the range you are able to get good data back. Height above horizon helps, so the same radar on a cruiser will see twice as far as that of a SS. Secondarily the Germans knew about radar but they were behind the British, where we got the tech from. And they shared nearly nothing with Japan who used spotlights for night fighting.
So 1. 15nm detection range from a sub. 2. Knowing what to listen for on what frequency.and 3. Making use of that information.
German radars were very good at the beginning, just not the extensive arrays like England. Those equipped on their night fighters were also deadly.
The Japanese also had radar, towards the latter end of the war anyways. The Germans shared many things with them.
I read that the naval raids on Kure in 1945 took such heavy casualties because the Japanese had pretty good radar guided AA guns at that point.
I love that book. When my nubs earned their fish, I would read a passage from that book.
The Japanese definitely detected the American radar on occasion. First example that comes to mind is when Sealion came across Yamato and Kongō after Leyte: Yamato detected the American radar and put out the alert that there was a surfaced submarine nearby. Didn’t save Kongō, which not only was the only Japanese capital ship lost to submarine in WWII, but had the audio of the entire engagement recorded inside the conning tower: both torpedo hits are clear in Part 2 (though the audio quality of the oiler attack is much better): https://maritime.org/sound/#sealion
While there were fewer US submarines in the Atlantic, Allied anti-submarine aircraft were regularly equipped with radar, and the Germans developed detection systems to warn the U-boats. This article on uboat.net gives a decent overview of the various types: https://www.uboat.net/technical/detectors.htm