Betelgeuse

See !

 That's how memories can lead you down the wrong road . It was Bantry Bay and not Banff . If you look at the pieces carefully it looks like she may have been converted from something else .

 My ship was converted from a Victory and then stretched a little . Not Big and not small by the day's standards ,

The USS Betelgeuse (AK28/AKA11) was an Acturus class attack cargo ship during WWII.

The second USS Betelgeuse (AK280) was a Victory-class ship (formerly Columbia Victory) taken over by the USN.    Eventually she was modified as an AS sub tender and tasked with ballistic missile support.

The Betelgeuse of Bantry Bay was a tanker,  neither of these.   Go to google

There was a tanker by that name which exploded in Bantry Bay, S Ireland, in 1979. So seems there were at least 2 by this name.