Orona atoll, also known as Hull Island, is one of the Phoenix Islands in the Republic of Kiribati. It measures approximately 8.8 km (5 mi) by 4 km (2 mi), and like Kanton, is a narrow ribbon of land surrounding a sizable lagoon with depths of 15–20 metres (49–66 ft). Numerous passages connect the lagoon to the surrounding ocean, only a couple of which will admit even a small boat. Total land area is 3.9 km (2 sq mi), and the maximum elevation is nine metres.