HMCS Oriole is the sail training vessel of the Royal Canadian Navy based at CFB Halifax in Halifax, Nova Scotia. She is a sailing ketch, currently the oldest commissioned vessel in the Royal Canadian Navy, and also the longest serving commissioned ship. Originally the yacht Oriole IV, the vessel was first acquired by the Royal Canadian Navy during the Second World War, then returned to private ownership at the end. Oriole IV was reacquired during the Cold War for use on the East Coast of Canada before switching to the West Coast of Canada in 1956. In 2018, the training vessel returned to the East Coast.