Union Jack (et al),
Brought back another scrap of memory from my Ancient Mariner:
"Two points abaft the beam", which I suppose has some connection with the arcane incantations under discussion.
The old chap (Tom Onley, by name) gave me his Pocket Code Book for 1913 (now long gone). As a boy, I could, at a moment's notice, sketch you the Pennant for a Commodore (2nd Class) in the Chilean Navy.
Not many people can say that.
Danny.