1. As a Proper Noun:
* If referring to the specific ship: Queen Mary (no need for "Ship")
2. As a Descriptive Phrase:
* If describing a ship: the ship Queen Mary or the Queen Mary ship
Here are some examples:
* "I visited the Queen Mary." (referring to the specific ship)
* "The ship Queen Mary was once a luxury liner." (describing a ship)
* "The Queen Mary ship is now a tourist attraction." (describing a ship)