[Nick Beale]

I'm not absolutely sure about the "enemy contact" bit (although the term is often noted in log books and operational reports). If AHB were translating "Feindb.", the original may have meant "Feindbeobachtet" = observed by the enemy. The Luftwaffe seems to have been quite interested in whether its losses were seen by the other side.

So, to complicate life even more, an accidental loss could still be observed by the enemy while a loss from combat damage may not have been.