NA-M420 => Gulf of Mexico Coverage includes the offshore bathymetric details for the Gulf of Mexico from Key West, FL over and around to Brownsville, TX. Additional coverage up the eastern coast of Florida to Jacksonville is included. Some coverage of the Bahamas is also included, covering western Northwest Providence Channel and the banks and shoals around Bimini. Fishing Contour Charts do not include coastal navigational features and are recommended for offshore fishing onlyThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.