HMS Lancaster (1797)
 HMS Lancaster was a 64-gun third rate ship of the line of the Royal Navy launched on 29 January 1797 at Rotherhithe. She was designed and built for the Honourable East India Company but was purchased by the Navy after the start of the French Revolutionary War.In July 1800 Vice-Admiral Roger Curtis sent Lancaster Adamant Rattlesnake and Euphrosyne to blockade Isle de France and Bourbon.