H.M.S. Pinafore
H. M. S. Pinafore; or, The Lass That Loved a Sailor is a comic opera in two acts. It opened at the Opera Comique in London, on 25 May 1878, and ran for 571 performances. It was Gilbert and Sullivan’s fourth operatic collaboration and their first international sensation. The story takes place aboard the Royal Navy ship HMS Pina Fore.