Sketch of the Gulf of Mexico Showing Lines of Deep Sea Soundings and Profiles of Bottom

An interesting chart showing the deep sea soundings in the Gulf of Mexico along with bottom profiles and temperature observations in a sub-sketch. General coastline features and places are shown with little detail.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low-quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.