But how can a radar detector prevent a submarine from making contact. It's not like the radar detector has a screen with a submarine shaped pip on it. The detector has a needle that says signal detected, strength x. No direction. No range. No avoidance possible. As Shinano shows, any attempt to evade is as likely to put you in more danger than if you had never intercepted the radar signal.
We're making a boogyman out of a simple radar detection where all you have is (at best) some idea of the strength of the signal and no supporting data.
The reality of the situation is when you intercept the signal you can draw a circle of a certain size that we can't agree on fifty years later and say "there's something with radar somewhere in the circle." How do you maneuver to avoid that?
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