Relief shown by 10 meter contours and spot heights. Depths shown by isobaths and soundings. Includes glossary, coverage diagram, and indexed boundary diagram. "Red numbered lines indicate the 1,000 meter Gabon belt grid, Clarke 1880 spheroid." Horizontal datum: local. Hydrographic datum: approximate level of lowest low water. Administrative divisions on this map are inaccurate. "NIMA ref. no. Z901XMATADI." "Reprint by NIMA 04-99."