4. Subjects of New Zealand (SONZ) Functions of New Zealand (FONZ) STM Database & Thesaurus UF Use For USE TT Top Term BT Broader Term NT Narrower Term RT Related Term SN Scope Notes Ships NT: Nuclear powered ships Passenger ships Warships RT: Boats Ports Shipping Shipwrecks Boats UF: Yachts NT: Canoes Fishing boats Jet boats Patrol craft RT: Boatbuilding Boating Marinas Moorings Shipping Ships Shipwrecks Yachts USE: Boats