HMS Racehorse bomb ketch 1:47Originally a ketch, this ship was strengthened and used for Arctic exploration with others including the Carcase on which Nelson served as a midshipman. Originally a ketch, this ship was strengthened and used for Arctic exploration with others including the Carcase on which Nelson served as a midshipman. Being strengthened she also had the capability to withstand the pressures of large mounted mortars, so with minor adaptation was used as a Bomb