How GPS works? Trilateration explained

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.

With ships as large as 175 feet wide and a channel a maximum of 500 feet wide, how to you safely pass? Former Houston ship channel pilot, Lou Vest, explains how ships fight against hydrodynamics to pass with such narrow margins.
https://houstonmaritime.org

Using pictures and sketches, this video finally explains the difference between gross tonnage (GRT) and net tonnage (NRT); the ship spaces that are included/excluded in their calculation; and the importance of these terms to ship owners.
Contents of this video will benefit mariners preparing for exams (written and oral examinations).

Managing the Attributes of Pilot Errors in the Process of Redevelopment of Marine Pilot Reliability Index MPRI): A Systematic Literature Review

This video explains the impact of lateral resistance on the turning circle of a vessel using animations. The video explains the term lateral resistance, shows an example of its impact on the turning circle and its associated aspects (advance, transfer, tactical diameter and drift angle).
Contents of this video will benefit mariners preparing for exams (written and oral examinations).

Risk Involved When Unmooring Operation on Deck

#PilotVessel "ZEYA LP"/ On board #BulkCarrierShip "CYCLADES" #ZonaComún  #RioDeLaPlata #Argentina / 08th. February 2026 - 07:21 LT.- On this video (with original sound), you can watch the Pilot Vessel "ZEYA LP" approaching alonside the Portside of the Vessel, in #ZonaComún #RioDeLaPlata #Argentina , to change Pilots (Embarking Manuever of Rio Paraná Pilots and Disembarking Maneuver of the Rio de la Plata Pilots).- This video was filmed on board the following Vessel: Bulk Carrier Ship...

Pilot boarding Spirit of Tasmania ship from Pilot Boat- Epic scene as in movies
#Spirit of Tasmania
#Bass strait channel