Alligator

HMS Alligator was a 28-gun Atholl-class sixth rate of the Royal Navy. She was launched at Cochin, British India on 29 March 1821.
The Alligator, under the command of Captain Lambert,[1] operated in the Bay of Islands in New Zealand during the 1830s. In March 1834, the Alligator, was on hand (and fired the 21-gun salute) at the first hoisting of the first national flag of New Zealand, at Waitangi.[2]
She eventually became a depot ship at Trincomalee in June 1841, and was then converted to a troopship in July 1842. Alligator was finally hulked as seamen’s hospital at Hong Kong in December 1846.
https://en.wikipedia.org/wiki/HMS_Alligator_(1821) (accessed on 6/9/2017)