HMSPrincess Mary(1688) was a yacht built in 1688. She was sold at some point, becoming a merchant ship. She remained in service until 1827 under the name Betty Cairns.
HMS Princess Mary was a 60-gun fourth rate launched in 1704 as HMSMary. She was relaunched in 1742 as HMS Princess Mary, and was sold in 1766.
HMSPrincess Mary II was a minesweeper lost to a mine in the Aegean on 8 February 1919.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.