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Originally Posted by Stanny
Actually,there are such situations when both contacts are changing their bearings (shifting) after you complete a turn of the ownship.
I tried out making such resolution turns while looking at TA narrowband waterfall displays.The only difference you can notice between two equal contacts is that one is shifting more degrees than another.For example,one was assigned at 255 and shifted to 259,other was assigned to 166 and shifted to 163.There is a difference 4 Vs. 3 between the change of both contact bearings,and I think that contact that shifts less is a true bearing.
We do not have such a clear picture of what is going on in narrowband,unlike broadband where there are two visible lines on waterfall displays.We can only use tracker review button in order to see what happened to each contact,whether it changed it's bearing or not.
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Hence why the use of UUV's is crucial to keep track of the contacts.