Luka Grebaštica is entered between Rt Oštrica Vela (43°39′N 15°54′E), the W extremity of Poluotok Oštrica from which a light is exhibited, and Rt Bilo, about 1 mile SE. The villages of Bašelovići (Banovći) and Grebaštica lie at the head of the harbour. A long, ancient wall, situated on the heights on the N side of the harbour, is prominent. Otočić Tmara lies close W of Rt Bilo. Anchorage, as appropriate to size of vessel, may be obtained about 1140 meters miles ESE of Rt Oštrica Vela in 27 to 38 m if necessary, a hawser to the shore, or in the coves on the N side of the inlet, and in the inner part of the inlet in the vicinity of Bašelovići (Banovći), avoiding a submarine cable which crosses the head of the harbour near Bašelovići.