The NHA provides timely Notices to Mariners for the correction of all Nigerian Government navigational charts and publications from a wide variety of sources, both foreign and domestic. The Agency also provides information for update of existing Admiralty Charts, in line with the subsisting Cooperation Agreement between the UKHO and the NNHO. To ensure the safety of life at sea, the information published in the Notices to Mariners is designed to provide for correction of unclassified nautical charts, and other related nautical publications.