NDGPS Federal Register Notice published July 2016 (will open a new browser window)

Coverage Plots

NDGPS provides service for coastal coverage of the continental U.S, the Great Lakes, portions of Alaska, Hawaii, and a greater part of the Mississippi River Basin. The plots attempt to account for ground conductivity, transmitter output power, and land topography using Millington’s method. To view these coverage areas, simply use the links below.

DGPS Partnerships

The US Coast Guard operates the Nationwide DGPS System for surface users. The primary users of this GPS augmentation system are mariners and surveyors. To provide this free service, the US Coast Guard leverages its partnerships with the US Department of Transportation (DOT) and the US Army Corps of Engineers.