To Sink or Not To Sink

[jscharpf]

I once was waiting around for a medium sized cargo ship to sink after I had hit her with my last torpedo.

While trying to slowly get close to her I accidentally hit her (on the side near where my torpedo hit) and she sunk.

I don't remember taking any damage maybe some but I just don't know if that ship sank from me or was it coincidence and was going to sink then anyway.