Not to get sidetracked but with the only port in the Blacksea big enough to handle such a convoy under 200 miles from Romania and the USSR having dick in the way of AVGAS the chances of unloading such a convoy is very remote. Also a few well placed mines before the Bosborus (sp?) or in USSR harbours ( germans had Air dropped ones by now ) and things also shutdown. Historically with Italy all but neutralized in 1943 in OTL, why do you htink it was late 1944 before the first Convoys made the run in the Black Sea?

Russ / Roller007