The Ancient and Honourable Fraternity of Royal Ark Mariner, more commonly known as RAM, has been under the jurisdiction of the Grand Lodge of Mark Master Masons since 1871 and governed by the Grand Master's Royal Ark Council. However, its early history is obscure. Statutes refer to Grand Lodge being reconstituted in 1772. It is recorded that the Grand Lodge of Mark Master Masons took possession of the rights to the Grand Lodge of Royal Ark Mariner on 10 June 1884 for just £25.
Lodges are attached, or moored, to Mark Lodges assuming their Number in the Roll and to be a member the Candidate has to have been advanced as a Mark Master Mason. There the similarity ends. In chronological terms it precedes the Mark by hundreds of years because it relates to the building and voyage of Noah's Ark and the Great Flood and has none of the other characters that we meet in Freemasonry.
There are no individual Ranks within either Province or Grand Lodge. Brethren holding those Ranks suffix their name with Royal Ark Mariner Provincial Grand Rank or Royal Ark Mariner Grand Rank. The Grand Master of the Mark is, ipso facto, the Grand Master of the Degree of Royal Ark Mariner.