Two submarines of the Royal Navy have been named HMS Unseen

• HMS Unseen (P51) was a Second World War U-class submarine launched on 16 April 1942 and later served in the Mediterranean, being broken up in 1949.
• HMS Unseen (S41) is the old name of HMCS Victoria, a long-range hunter-killer (SSK) submarine of the Royal Canadian Navy, that was purchased from the Royal Navy in 1998.

See also

• H.M.S. Unseen (novel), a novel by Patrick Robinson

References

• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.