|It came up in the "Who Is That Fekker On The Quarterdeck" topic about what is the "quarterdeck".
In the Royal Navy, and consequently other Commonwealth Navies, the aft section of the ship was designated the quarterdeck.
It used to be marked with a brass strip on the deck, and everybody was supposed to salute when stepping over the strip. That "custom" no longer exists.
The "quarterdeck" traditionally marks "officers' territory", as in days gone by all officers were accommodated aft. This, of course, has changed, with officers' cabins being either beneath the bridge as well as in the "traditional" area aft.
However, the quarterdeck remains the quarterdeck.
If, when alongside, a ship has two brows, then the after one leads onto the quarterdeck and is for officers (or "distinguished persons")only.
In the Commonwealth Navies, when stepping on board we don't turn aft and salute the ensign - we salute the ship as we either step onto or off the brow.
Hope this clears things up for the American members.