The Net class were a class of boom defence vessels of the Royal Navy and Royal Australian Navy during World War II. Ships Of the eleven ships of the class ten were built in shipyards in northern England and Scotland, while the eleventh was built in Sydney, Australia. One ship, HMS Bayonet, was lost when it struck a mine in the Firth of Forth on 21 December 1939, probably laid by the on 4 November. Royal Navy HMS Sonnet (Z47) Royal Australian Navy See also Bar class boom defence vessel References External links World War II net laying ships Auxiliary gateship classes