The Funafuti atoll's lagoon (''Te Namo'' in Tuvaluan) is 24.5 km (15¼ miles) long, north to south, and 17.5 km (10¾ miles) wide, east to west, and has an area of 275 km2 (106 sq. mi.), making it by far the largest lagoon in the nation of Tuvalu. It is about 52 metres (28 fathoms) deep in some places, but only 6 metres (3¼ fathoms) deep in other places (because it has several submerged rocks and reefs along its bottom, some of which are that close the surface). The deepest basin is in the northern part of the lagoon (the maximum recorded depth is 54.7 metres 30 fathoms), while the southern part of the lagoon has a very narrow, shallow basin.