Video

How does GPS work?


published on 4 July 2019 326 -

by Casual Navigation
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Article GPS (Part 1) - Structure, mode of operation, technical and physical fundamentals of GPS

by Capt. Gunter Schütze, Thailand/Germany - published on 30 January 2020

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.

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Article GPS (Part 2), physical and technical errors of GNSS - an error analysis

by Capt. Gunter Schütze, Thailand/Germany - published on 26 February 2020

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,

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Article GPS (Part 3) - Accidental interferences and intended Interferences by extern technical sytems

by Capt. Gunter Schütze, Thailand/Germany - published on 6 May 2020

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

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Opinion Scientific Fact: The ‘traditional’ understanding of the ship’s pivot point is wrong!

by Tim Cummins, Harbour Pilot, Portsmouth International Port - published on 9 July 2020

In fact, the pivot point that we “see” is a trick of the eye, it looks like the ship is rotating about this point but in fact it is elsewhere, a point that you cannot see.

Opinion What is a Tug's Bollard Pull and How İt is Calculated?

by Capt.Alpertunga Anıker - published on 24 November 2022

The Bollard Pull value, which can be interpreted as the maximum thrust that is developed for a specific amount of time by the propulsion systems of any vessel to the fullest , when it has zero speed in the forward direction, is the criterion that allows us to understand how suitable a tugboat is for a port maneuver or a towing operation.

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Article Pilot dispatching problem along a maritime corridor: a case study in the St. Lawrence River

published on 13 May 2025

This study presents a novel decision support process for a pilot dispatching problem in the St. Lawrence River. It integrates a comprehensive set of time-based performance measures, including working time, waiting time, and skill level differences, to optimize fairness and operational efficiency in pilot dispatching.

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Video Electronic Chart Standards: IHO ECDIS and ENC

published on 29 October 2019

Tom Mellor - C​hairman of the IHO Electronic Navigational Chart Working Group (ENC WG) and Head of Digital Standards at the UKHO - explains what the IHO's ECDIS and ENC Standards mean.

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Video Safe set-up of pilot ladders

published on 8 January 2024

This safety video examines the safe set-up of pilot ladders and details the safety checks that should be carried out before using a plot ladder to ensure a safe boat transfer.

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Video The SHIP Voyage - by Capt. Pilot Nasir Khan

published on 23 August 2022

The Ship Voyage - Poem - By_ Khan
www.Marine-Pilots.com

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Article Danish pilots agree to collective agreement

published on 20 October 2022

We are satisfied with the result, and it shows that continued constructive dialogue with the employer pays off," writes Jens M. Sørensen, chairman of Lederne Søfart, in a press release.

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