Her Majesty's Royal Yacht Britannia at anchor.

The Royal Yacht Britannia which was anchored off the reef at Avarua,Rarotonga.
February 1977 two Cook Islands Customs Officers, two Immigration Officers, the Cook Islands Government Chief Government Liaison Officer Nga Pierre, along with Bill Johnson (Official Cook Islands Government Photographer) boarded the Royal Yachts Gangway, and were piped onboard.
While Customs and Immigration officers cleared the ship's arrival, the liaison officer Nga and Bill were offered tea/coffee in the Warrant and Chief Petty Officers' Mess Room before meeting the Rear-Admiral Sir Hugh Janion on the wing of the Royal Yacht's bridge, which is normally totally ‘Off Limits’ apart from the ship's crew. During their conversation with the Rear Admiral on the starboard wing of the bridge, the Britannia's pulled her anchor 'off the edge of the reef', and the Royal Yacht was forced to then steam back out to sea, before re-anchoring about an hour later. Bill said, there I was not only on-board Her Majesty's Royal Yacht 'Britannia' one of the most famous ships in the world, meeting & talking with the Rear-Admiral, now I was being treated to a short cruise on H.M. Royal Yacht, how many people in the world have had that honor their lifetime?
During the re-anchoring procedure the ship's photographer met Bill and personally offered him a brief tour of the Royal Yacht including an inspection to the ship's photographic darkroom.
Before proceeding ashore, Bill offered to reciprocated with a personal guided tour of Rarotonga, before sailing time that evening.
The Royal Yacht was launched by Her Majesty on 16 April 1953 and was commissioned for service on 7 January 1954. It was decommissioned in December 1997. During this time, Britannia travelled more than a million miles on Royal and official duties around the world.