A Gilbert and Sullivan operetta, H. M. S. Pinafore.
(SP450: dp. 14.5; l. 45; b. 123; s. 9 k.)
Pinafore was built in 1902 by the Mare Island Navy Yard, Calif. as a ferry launch.
Pinafore was used by the Mare Island Navy Yard as a construction and repair launch until she was struck from the Navy List 1 July 1920.