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Description

This nautical chart was originally surveyed by the U.S. Coast and Geodetic Survey in 1887 aboard the U.S.S. Ranger, under the direction of Lieut. E.K. Moore, U.S.N. It was first published in 1888, with larger corrections implemented in 1908 and subsequent minor updates to 1915. 

The map focuses on the Pacific coastline of western Mexico, specifically the adjacent harbors of Manzanillo Bay and Santiago Bay, both located in the state of Colima. The two bays include extensive hydrographic soundings (in fathoms) detailing depths throughout the harbor approaches and inner anchorages. Prominent soundings radiate from the coast into open waters, providing safe navigation data for mariners entering these key commercial and naval harbors.

Major geographical features include:

  • Manzanillo Bay lies to the southeast and is demarcated by a long, curving sand spit and lagoon system (noted as "Estero de Manzanillo" and "Cuyutlan Lagoon").

  • The port town of Manzanillo, already well developed by the late 19th century, is located at the northeastern edge of this sand spit, adjacent to the harbor entrance.

  • Santiago Bay occupies the northwestern quadrant of the chart, with surrounding coastal bluffs and hills carefully shaded using hachure to show elevation and terrain.

  • A pair of compass roses facilitates magnetic navigation.

  • Inland topography includes the Sierra Madre del Sur foothills, rendered in fine detail, aiding coastal pilots in visual identification from sea.

Navigational Aids and Annotations:

  • Numerous anchorages, reef warnings, and tidal flats are labeled.

  • The coordinates Lat. 19°03′14.8″ N / Long. 104°19′49.6″ W mark the precise observation point in Manzanillo used during the 1887 survey, shown with a bracketed note near the town area.

  • The chart provides sailing directions, tide information, and precautionary notes, typical of U.S. Hydrographic Office standards of the period.

This chart reflects the importance of Manzanillo as a strategic port during a period of growing American naval and commercial interest in the Pacific.