How does GPS work?

Of course, as a Nautical Specialist, I also deal with the international discussion on the advantages and disadvantages of satellite-based navigation, e-navigation and conventional terrestrial and astronomical navigation.

In my announced sequel, the second part of GPS, it is primarily about the technical and physical operational and functional limitations to which GPS is subject. These limitations, in part, have serious implications for the accuracy of GPS, and even go as far as limiting the functionality of GPS in its functions or even making it impossible. In doing so,

The vulnerability of GNSS in shore-based use is definitely different and to be regarded as much more risky than on the high seas.

Article by Seyed Behbood Issa-Zadeh & Claudia Lizette Garay-Rondero

Another worthful video by Knud Benedict, Germany

In this video, you can take a look at what happened when the Napoli broke her back and was run aground on the south coast of the UK.

Electronic warfare in the Baltic Sea is escalating rapidly, with GPS and AIS disruptions posing growing risks to maritime navigation. Russia’s hybrid strategy is targeting both safety and stability in one of Europe’s most critical shipping regions. Pilots and crews now face a new reality: navigating under threat.

On April 20, 2026, the Columbia River Bar Pilots conducted a MOB drill with the U.S. Coast Guard Station Astoria.

During the transit time on the pilot launch between the shore and the vessel, marine pilots will spend at least a portion of that time carrying out (either consciously or subconsciously) a risk assessment of the forthcoming operation.

Pilot transferring is unsafe and dangerous by Harbor Tug Boat from or to the ship. I analyzed and observed at many ports, Pilots using Harbor Tug Boat for transferring. Where Tug boats decks are not specially designed for the Pilot transferring. This is difficult for the Pilot during Embarkation and specially Disembarkation. Video courtesy Nasir Khan. Find Capt. Pilot Nasir Khan on Marine-Pilots.com: https://www.marine-pilots.com/members/112390