The Resilient Navigation and Timing Foundation (RNT Foundation) is a non-profit, public benefit corporation that helps protect critical infrastructure by promoting resilient navigation and timing worldwide. The Foundation has strong views on GPS and GNSS.

Other sites featured are: the United States Coast Guard Navigation Center, the Norwegian Armed Forces Forum website and particularly this page reporting the demolition of Loran aerials in Norway, this wonderful collection of material on hydrographic and related topics, a free subscription to receive regular breaking maritime news and IALA-AISM’s Annual Report for 2016.