Ilot Signal rises barely three meters above the lagoon's surface, a forty-hectare coral outcrop that has been a protected nature reserve since 1981. The islet lies two kilometers southwest of Noumea's Anse Vata beach, close enough that its silhouette marks every postcard view yet distant enough to filter the city's noise into open water and wind. New Caledonia's government designated the site to safeguard nesting seabirds and the green turtle population that grazes on seagrass beds ringing the shallows. No permanent structures interrupt the low scrub and white sand; the only human trace is a weathered navigation beacon at the island's north point, erected in 1952 to guide phosphate freighters into the deepwater channel. Water taxi Signal Island turtle tour departures link Noumea's marinas to the reserve's designated landing beach every day between 09:30 and 15:30. The crossing takes twelve to eighteen minutes depending on swell and tide, with rigid-hulled inflatables and small diesel launches threading the reef passages that separate the mainland shore from the barrier's inner lagoon. Visibility peaks in the morning hours before southeasterly trade winds roughen the surface; turtle sightings concentrate in the first two meters of water where Chelonia mydas browse on algae and rest in sand pockets between coral heads. The reserve's free-entry policy reflects New Caledonia's broader conservation framework, which relies on access fees at larger marine parks while keeping smaller sanctuaries open to low-impact visitation. Signal Island turtle tours operate under strict marine-park protocols: no feeding, no pursuit of wildlife, and a mandatory three-meter buffer around any turtle encountered. Guides brief passengers on approach etiquette and reef-safe sun protection before each departure. The island's shallow fringing reef extends fifty to eighty meters from the beach, creating a natural nursery zone where juvenile turtles shelter among staghorn coral and sandy channels. Peak nesting occurs between November and March, when adult females haul onto the southern shore after dark; daytime visitors between April and October see primarily subadults and foraging adults. The marine reserve shares its lagoon with three neighboring islets — Maitre, Laregnere, and Canard — each hosting similar turtle populations but differing in land access and infrastructure. Signal Island remains the least developed, with no pavilions or jetties, preserving the austere profile that captains have used as a daymark for more than a century.