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Originally Posted by SandyCaesar
All right. Lots of nice advice here, thanks a lot.
So, in an aircraft it boils down to getting lucky with methodically placed active buoy fields supplemented with MAD. I don't have enough GRAMs to keep track of all the buoys, but I suppose the computer the can do that?
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Buoys that have detected something show up with red dots on the map. (in propper DW-terminology "they went HOT") To see those red dots they
do not have to be selected in a gram. IE, in one of those P3 training missions I droped dozens of buoys to make 2 fine-mazed large grids. Only when I found a red dot did I pull them up into a gram and investigate further.
As for FFG active sonar. You can use the single beam mode to determine the general bearing of your 'invisible'-ping. Then perhaps send a helo along that bearing doing MAD searches. Or maneuvering around the contact along a max range circle to try to get a better aspect on it. But he's probably going to change course quicker than you getting a better angle on him by proceding 90 degrees along the circle. But atleast it provides a search datum for your helo, where the old and new bearing cross. Unfortunately we can't draw lines on the map.
p.s. You can determine the general distance as well, listen for WHEN the ping comes, and place the marker there in the updated return noise to read distance. Hmm... Then a circle on the map for that distance, and 2 markers for the 20 degree beam (or was it 10? anyway, remember single beam mode works bow-relative instead of true bearing), and you almost have him pinned down.