HMS Tenacity (1972). A one-off 40 knot fast attack craft, built as a private venture by Vospers it was bought by RN to join the Scimitars in the Fast Training Squadron. As designed she has a 76mm gun and four Exocet, but the RN disarmed her for training. Completed 1973. Complement of 28. On Scrap list at Rosyth 1985-86. Sold to overseas millionaire for conversion to luxury vessel but sank while work was being done at Portished. Finally raised and scrapped in 2001