Umboi Island

Umboi (also named Rooke or Siassi) is a volcanic island between the mainland of Papua New Guinea and the island of New Britain. It is separated from New Britain by the Dampier Strait and Huon Peninsula, and New Guinea by the Vitiaz Strait. It has an elevation of .
Languages are Papuan Kobai; and Austronesian: Mbula, Karanai, and Saveng languages.