501. Montserrat

502. Mouillage de Huacho : côtes de Pérou

503. Mouillage de l’ile Sn. Sebastiao : côte du Brésil

504. Mouillages de la Baie Tom

505. Mouillages de la Colonia

506. Mouillages des iles Otter et de la Romanche

507. The mouths of the rivers Nuñez and Componi

508. Municipio de Buenos Aires y parte del Partido de Avellaneda

509. Nantucket Shoals to Block Island

510. Nantucket I. to Great Egg Hr. : including Long Island Sound and shewing the approaches to New York

511. Nazareno Corrientes

512. New York bay and harbour

513. Newfoundland

514. Newfoundland : southern portion

515. North Atlantic : route chart

516. North Atlantic Ocean : eastern portion

517. North Atlantic Ocean : western portion

518. North Atlantic Ocean

519. North Polar chart : including the Arctics Seas from the Gulf of Yenisei on the west to Lancaster & Smith Sounds on the east, with Bering Strait and the Pacific Ocean to the 50th Parallel

520. North Polar chart : including the Atlantic Ocean to the 50th Parallel and the Arctic Seas from Barrow and Franklin Straits on the west, to Novaya Zemlya and Franz Josef Land on the east