[researcher111]

Egebert

Your hypothesis sounds reasonable to me and thanks for making the sketch , though according some publications I have at my end ,one of which is called " Rettung Zwischen Den Fronten " the courier flights of the Kriegsmarine had to shuttle between Naval bases in Romania and Bulgaria even Greece before getting to Berlin to collect / drop personnel & post . According Klemm's notes the flight refuelled at Arad Delta after a stopover at Pipera ( Baneasa) then was headed for Varna Bulgaria . What does not make sense to me is why they didn't fly directly from Pipera to Varna which possibly lays the key question, other than intending to collect/drop Luftwaffe personnel from Arad and then to Varna.

PS : On May 10,1944 the 15th AF out of Italy was conducting high alt.recon flights over Romania , no bombings or intrussions of Allied fighter or bomber aircrafts . The 2nd Ukrainian Front was conducting air to ground ops in Moldavia , I therefore exclude contact with the enemy on the crash perimeter area or SE of Bucharest.