Bougainville Strait is one of three major routes for merchant shipping through the Solomon Islands; the routes are the Bougainville Strait and Indispensable Strait which link the Pacific Ocean, Solomon Sea and Coral Sea; and the Manning Strait that links the Pacific to New Georgia Sound, which is also known as ‘The Slot’, through which Japanese naval ships resupplied the garrison on Guadalcanal during the Pacific War. Bougainville Strait Bougainville Strait separates Choiseul Island, part of the Solomon Islands from Bougainville Island, the next to the northward and part of Papua New Guinea. It was first passed through in 1768 by Louis
Choiseul Sound Choiseul Sound Choiseul Sound is a stretch of sea in the Falkland Islands. It runs parallel to Eagle Passage and is between Lafonia and the north of East Falkland. Lively Island is in its mouth. At its entrance, on the northern shore, is the Bertha's Beach Important Bird Area which is also a Ramsar site, recognising it as a wetland of international importance. It was named by Louis de Bougainville after the French Foreign Secretary, Étienne François, duc de Choiseul. The name is pronounced "Chisel" in Falkland Islands dialect. (Richard Munro, Place Names of the Falkland Islands, 1998, p. 18.)