Espiritu Santo

Espiritu Santo is the largest island in Vanuatu, covering approximately 3,956 square kilometres and rising to 1,879 metres at Mount Tabwemasana. The island's eastern coast faces the Segond Channel — a protected waterway between Santo and the smaller island of Aore — and this channel is the site of Luganville, Vanuatu's second city and the base for one of the most famous dive sites in the Pacific. The Segond Channel tidal regime is mixed semidiurnal, with spring ranges of approximately 1.0 to 1.5 metres. The channel's moderate depth and protected fetch make it navigable at all tide states for vessels drawing up to 5 metres. The SS President Coolidge is the reason most divers visit Santo. The 200-metre American luxury liner, converted to a troop carrier during World War II, struck two friendly-fire mines in the Segond Channel in October 1942 and sank in approximately 4 hours, settling on a slope with the bow in 20 metres and the stern in 67 metres. The ship is diveable from the beach at Luganville — there is no boat journey involved — and the accessible sections of the hull (promenade deck, first-class lounge, cargo holds) are reachable by open-water divers. The deeper sections require technical diving certification. Champagne Beach, on the northeastern coast, is separated from Luganville by 45 kilometres of road that passes through coconut plantations and small villages. The beach is frequently cited as among the Pacific's finest: white coral sand, clear turquoise water sheltered by a fringing reef, and a line of trees providing shade. The 'champagne' name refers to volcanic CO₂ seeps visible offshore as streams of fine bubbles rising from the seafloor — a common phenomenon in Vanuatu's geologically active zone. The reef offshore is shallow and accessible by snorkel. Port Olry, on the northwestern coast, is a French colonial-era village with a protected lagoon behind a limestone reef. The reef flat at low water provides a natural walking platform above the channel, and the community runs small-scale tourism including guided village visits and boat tours of the lagoon.