100% certain I didn't get bombed. I watched the replay once from the surface and once centered on where I took the damage.
After looking at the maps though, I concluded that I am in fact in the right area for a minefield and I was last time around too (East China Sea just off the coast). These minefields also have their mines set at depths between -35 and -20 which if in meters means between 65ft and 115ft deep. It is the right depth to account for both incidents. Weird that it didn't render though
Anyway by DID rules it looks like I am starting again. S-42 Class, April 22nd 1942 out of Brisbane. Not a minefield even close.
Thanks again propbeanie. Wouldn't have been able to figure it out without your advice