Destroyer's detection circles

Greystone · 03-03-11, 09:17 PM

I was submerged and maneuvering between two destroyers recently and it reminded me of a question I've been meaning to ask. Those various circular lines around the destroyer on the nav map; I know about the angle projected out from behind the escort, about 45 degrees, ("behind the escort's baffles") where their sound detection is lost, but what's the significance of the others?
1) The spade-like projection right in front of the ship; what's it signify?
2) The smaller, closer circle around the ship....?
3) The larger, outer circle around the ship...?
Thanks for the help!

03-03-11, 09:17 PM	#1
Greystone Sparky Join Date: Apr 2007 Location: San Francisco area Posts: 155 Downloads: 135 Uploads: 0	Destroyer's detection circles I was submerged and maneuvering between two destroyers recently and it reminded me of a question I've been meaning to ask. Those various circular lines around the destroyer on the nav map; I know about the angle projected out from behind the escort, about 45 degrees, ("behind the escort's baffles") where their sound detection is lost, but what's the significance of the others? 1) The spade-like projection right in front of the ship; what's it signify? 2) The smaller, closer circle around the ship....? 3) The larger, outer circle around the ship...? Thanks for the help!