Navaleye, if Glamorgan was passed by the AM-39, she would have to be close to Avenger (the suposed target for the AM-39) or well the AM-39 was defected by chaff and changed its course undetected by the pilots who were suposed to follow it at least during the first moments after launching. Anyway argentineans pilots didnīt report any other ship near Avenger.
The first MM-38 launching happened on 1st june. I read (donīt remember where) that there were a group of ships that night (not only Avenger)
Regards