Catan-ManAh! Of course.
On this occasion, the Acronym you have spotted is actually the User Name of a regular poster on this forum.
It struck me that you might like to see examples of Acronyms which are in use in the Navy. Quite a few of them are mentioned in Rick Jolly's book, Jackspeak. Rick's book is really a lexicon of the words which comprise the slang of the Royal Navy, hence Jackspeak.
The late Dr Jolly served as a Medical Officer for some 25 years, most notably in the Falklands.
I think that you might find Jackspeak very interesting; the entry for the word 'Bish' will be of particular interest to you.
<p><i>Jackspeak</i> is a comprehensive reference guide to the humorous and colourful slang of the Senior Service, explaining in layman's termsthe otherwise cryptic everyday language of the Royal Navy, the Royal Marines and the Fleet Air Arm. Featuring more than 4,000 alphabetical entries, it was...