goofer 3
I think you've solved the mystery. I enlarged and applied high contrast to my original photo and it now looks as though D-75 was a trick of the light and it is in fact D-79 and therefore the ship/boat in question is PNS Khaibar - dates, location and event seem to fit so thanks for this.
skyfish2
If you can row it,it's a boat if you can't it's a ship
Does your axiom apply to U-Boats?
I knew an ex-submariner once who when he applied for a job in civvy street gave his profession as "Underwater Firefighter"!