[Rockin Robbins]

No matter how you slice the details you know everything. They know that somewhere out there something is using something on a radar frequency. They can't see you because of your radar signal. They just know it's there.

Advantage submarine. Run it all the time. Against merchants there are no detectors at all. Against warships they can only say you're somewhere. They don't even know it's a submarine. That leaves no details worth considering. WWII submarine skippers agreed and operated accordingly, as I've already shown.