Tuvalu, Nanumea, Bathymetry chart, 1 :25 000

Nanumea is an elongated atoll 13 km long along the NW-SE axis, and 2.4 km wide along the SWNE axis, centred on 176 degrees 6'E and 5 degrees 39'S. The surveyed area extends to a maximum of approximately 5.3 km offshore from the coastline at the northwest tip of the atoll.
The resultant data from the SOPAC marine survey conducted in 2004 was used to produce nine bathymetry charts for Tuvalu at scales ranging from 1:20 000 to 1:50 000 and the Nanumea bathymetry chart is available here for download under the Distribution Info.
This work was initiated by the SOPAC/EU Reducing Vulnerability of Pacific ACP States Project
(Task no.: TV 1.1.1).To provide a descriptive picture of the ocean bottom terrain, vividly revealing the size, shape and distribution of underwater features, and serve as the basic tool for scientific, engineering, marine geophysical and environmental studies, as well as marine and coastal resource management.The water depth within the survey area around Nanumea ranges from 12.1 to 2511.7 m. The island is encircled by a near continuous scarp (slope angles > 60 degrees), located approximately 150 to 250 m seaward of the reef crest, 80 to 100 m below sea level, with scarp heights of approximately 100 m.