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GSmith63 · 11-22-17, 10:44 PM

Hi all. In reading the manual, the section on TMA includes a number of factors that increases the speed at which a target solution is likely to be produced - high bearing rate being an example. I think a couple of important factors might have been left out, unless they were later added after the manual was completed.

First, if the contact is held on both the bow sonar and the towed array, shouldn't this allow for a very rough triangulation that would narrow down the possible location of the contact?

Second, I've always heard that subs attempting TMA will do one or more course changes. This is supposed to help limit the number of possible contact locations provided by the bearing data, assuming that the target keeps a steady course/speed.

Are these two factors taken into account?

11-22-17, 10:44 PM	#1
GSmith63 Sailor man Join Date: Nov 2017 Posts: 48 Downloads: 1 Uploads: 0	TMA - Missing Variables? Hi all. In reading the manual, the section on TMA includes a number of factors that increases the speed at which a target solution is likely to be produced - high bearing rate being an example. I think a couple of important factors might have been left out, unless they were later added after the manual was completed. First, if the contact is held on both the bow sonar and the towed array, shouldn't this allow for a very rough triangulation that would narrow down the possible location of the contact? Second, I've always heard that subs attempting TMA will do one or more course changes. This is supposed to help limit the number of possible contact locations provided by the bearing data, assuming that the target keeps a steady course/speed. Are these two factors taken into account?