Although she is known by the prefix HMS, meaning Her (or His) Majesty's Ship, she is not, and had never been, commissioned in the Royal Navy.

In 1991, The Connecticut General Assembly passed "An Act Concerning the HMS Rose" in which the ship was commissioned as a vessel of the Connecticut Naval Militia.
 The act stated that the H.M.S. Rose Foundation was responsible for maintaining the ship, but when the ship was sold to 20th Century Fox, the statute was not repealed and is still in effect.
Although she is known by the prefix HMS, meaning Her (or His) Majesty's Ship, she is not, and had never been, commissioned in the Royal Navy.
In 1991, The Connecticut General Assembly passed "An Act Concerning the HMS Rose" in which the ship was commissioned as a vessel of the Connecticut Naval Militia.  The act stated that the H.M.S. Rose Foundation was responsible for maintaining the ship, but when the ship was sold to 20th Century Fox, the statute was not repealed and is still in effect.
HMS Surprise (replica ship)