The Sound Speed Profile was like this one:
So I guess that shows that when you are far enough and under the layer, you will not be detected, but when you are very close, you will be.
What I feared was detection when above the layer, so I was ducking under it and hoping I would avoid the pinger, but the problem is that you cannot detect the pinger either when you are in this so-called shadow zone. So inevitably I got too close to the surface ship without knowing where it was, and so I got pinged whilst being under the layer.
From your replies I understand that it is necessary to peak above the layer at times to get a bearing and range on the pinger, and then stay about 4-5 nm clear of it. I assume while staying under the layer?
Because FPSChazly's data suggests detection possibilities from a max of 9.82 nm, which I assume is above the layer.
Cool beans, thx!