aahhh... I have gone back to a save where I am in the English Channel proper, and I have TC'd up to x32, gone to periscope depth, generally fiddled about, and all is behaving ( so far) as it should, so I think it might be to do with being in shallow water between two land masses ( I am guessing, but it isn't where you would normally expect to see a sub is it?).
I can remember once before, probably before GWX, where there was a 'funny' if you were in shallow water, where, if you tried to put the event camera close to another boat, you would get a CTD. Perhaps this is related. Anyway, I have cheered up again. Thank you for your help gentlemen
