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breadcatcher101 · 12-31-09, 11:12 PM

You mean FM sonar I think, was used to detect mines late in the war.

12-31-09, 11:12 PM	#6
breadcatcher101 Captain Join Date: Sep 2008 Location: Southeastern USA Posts: 546 Downloads: 1 Uploads: 0	You mean FM sonar I think, was used to detect mines late in the war.