NGA Chart 81531-Eniwetok Atoll - Eastern Part Printed on heavy weight acid free paper. Printed on demand using the latest files provided by NGA. NGA charts are historical and not updated with the latest notice to mariners (NTMs) NGA certified and vetted reseller. Printed by East View Map Link. Map Scale: 1:40,000. Map Size (inches): 35 x 53.