NOAA Nautical Chart 81054: Mariana Islands Apra Harbor, Guam is a standard navigation chart used by commercial and recreational mariners alike. Printed "on-demand" with water resistant paper, it contains all of the latest notice to mariner (NTM) updates at the time of printing. The National Oceanic and Atmospheric Administration (NOAA) has partnered with OceanGrafix to provide commercial and recreational mariners with the most accurate nautical charts. This chart meets the definition of a nautical chart laid out in SOLAS Chapter V Regulation 2.2 and also meets the carriage requirements defined in SOLAS Chapter V Regulation 19.2.1.4