Two TA = No bearing ambiguity

[MaHuJa]

Running with two towed arrays out would provide you with a potential problem: towed arrays getting tangled in each other. That is not simulated in DW.

Further, you'd need to have the two TAs exactly as far out, and I think preferrably the same depth. (Oops, there went the ability to choose what sort of TA you need, fast or sensitive...)

What Kazushima (:hmm: gotta look that up, I suspect it will translate) said (non-fixed offsets) doesn't apply all that much for bearing resolution, until they swirl too close, into each other, or even switch sides, but when they do... If you stream them far, so as to let them get deep, and far from ownship noise, etc, etc, the swirling around will be greater.

Potentially even switching sides; That's a type of bearing resolution I would not want.


The only way I could see this get done is to give the TAs a small "tail" with two hydrophones and a "ballast" to make sure it doesn't roll, or four hydrophones and a direction sensor, and place them on the end of the TA. The idea is that the exact separation length shouldn't matter, as long as you can determine which side the sound came from. Essentially, this is to transform the TA from a one-dimensional to a two-dimensional sensor.