[Niedowidek]

Well, this is ancient thread now but I haven't found another on that topic and I'm in similar situation.

First days of war, lone tramp steamer (no convoy), sea rough (wind speed 10 m/s), playing NYGM. When spotted, steamer had small fire on bow. After some chase it seemed to develop another small fire, this time on stern (not sure 100% if it's stern because of increased distance and worsening weather, but surely there are two small fires on this single steamer now).

So explanation of bigboywooly sounds good to me. The same type of ship, no convoy this time.

BTW it's very helpful - I don't see silhoutte of ship now but fires are visible very well from far away ;-)