The Duff Islands consist of:
- Taumako, the main island, with nearby Tahua artificial Island and Tohua and Tatumotu
- The Bass Islands: Lua, Kaa and Loreva
- Treasurer's Islands: Tuleki (Nula), Elingi (Obelisk Island), Te Aku (Te Ako), Lakao and Ulaka
Frequently, Hallie Jackson Reef is mentioned in the context of the Duff islands, although it is located 45 km west of the 32 km long island chain, and although it is no island, but at most a submarine reef. In the Sailing Directions of 1969 Hallie Jackson Reef is described as a reef 24 feet deep, at 9°44'S, 166°07'E. The corresponding current (2010) publication has no mention of the reef anymore.
The inhabitants of the Duff Islands are Polynesians, and their language, Pileni, is a member of the Samoic branch of Polynesian languages. On the islands of Duff live about 500 people. The way of life is traditional by subsistence farming and fishing. Taumako has no roads, airport, telephones, or electricity. Contact with outsiders comes by battery-powered marine radio and the occasional cargo ship.
The first recorded sighting by Europeans of the Duff Islands was by the Spanish expedition of Pedro Fernández de Quirós where it anchored on 8 April 1606. Its inhabitants named the islands as Taumako. They were charted by Quirós as Nuestra Señora del Socorro (Our Lady of Succour in Spanish).
Studies of David Lewis and Marianne (Mimi) George uncovered that full traditional Polynesian navigational technique is still preserved in these islands (Finney and Lowe, 2006, p163).
- Duff Islands, Solomon Islands, solomonislands.com.sb
- Ben Finney and Sam Low, "Navigation", in K.R.Howe(eds), "Vaka Moana:Voyages of the Ancestors", Bateman, 2007. ISBN 978-0-8248-3213-1
- Hydrographer of the Navy, Pacific Islands Pilot Vol. II, 1969, Seite 254
- Pacific Islands, Pub. 126, Sailing Directions (Enroute) for Pacific Islands, Twelfth Edition, 2017
- Sharp, Andrew The discovery of the Pacific Islands Oxford, 1960, p.61.
- Brand, Donald D. The Pacific Basin: A History of its Geographical Explorations The American Geographical Society, New York, 1967, p.137.
- Kelly, Celsus, O.F.M. La Austrialia del Espiritu Santo. The Journal of Fray Martín de Munilla O.F.M. and other documents relating to the Voyage of Pedro Fernández de Quirós to the South Sea (1605-1606) and the Franciscan Missionary Plan (1617-1627) Cambridge, 1966, p.39,62.