I picked this up at an auction a few weeks ago.
This seems to be a British Forces Mail Formular Aerogramme form, used in H.M.S. Forces. South Atlantic, posted with a "Maritime Mail" handstamped cancel. a ship cancel on February 2, 1990 from H.M.S. Endurance, which was an ice control vessel that served until 1991.
Cachets on both center section and inside section of airletter front side, make for a busy cover.
Most interesting however....

Here is a photo of the ship (pulled from the internet)

All in all, I am pleased with this addition to my collection.

Any comments?