Not a shantie, but fits into most sea-song sessions, Kipling's "The Liner She's a Lady" - not so much about ships as a Portsmouth "Purveyor of Horizontal Refreshment". Pete Bellamy set it to music and so have I. You can find the words and my tune here.

If anyone wants a proper (ie non MIDITXT) MIDI file or a score in PDF format, PM me with an e-mail address.