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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Video Stern-First Method for POD Ships –Practical samples starting with Twin screw followed by POD ships

published on 12 August 2022

Practical samples for manoeuvres for ships going astern - as Stern-First-Method SFM. Introduction using as sample from the Master Thesis by Karel Wiegert for an arrival manoeuvre of a cruise vessel in Southampton port with a Twin-screw vessel under strong current. The same manoeuvre with the same ship model was used to show the advantage of Fast Time Simulation FTS using the SAMMON Planning Tool. This goes much faster than the manoeuvres in the real time simulator - and it can even be...

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Video Maritime Pilot Training IV - Man overboard manoeuvre

published on 12 May 2021

Training video IV on the correct behaviour in case of man overboard

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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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Article Houston Pilots Practice Part Art, Part Science in Guiding Ships to Port

published on 11 November 2020

Maritime pilots trace the roots of their profession back to the ancient Greeks and Romans when incoming ship captains employed experienced local fisherman to guide their merchant vessels safely into port. It’s a legacy of skill, strength, and sharp wits, and our Houston Pilots (“Pilots”) have been meeting vessels at Galveston’s bar to carry on these proud traditions for just shy of 100 years.

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Article Study: increasing competition in ports and the underlying pressure

published on 2 October 2021

A study of increasing competition in ports and the underlying pressure to improve port performance. This thesis is the final deliverable for the completion of the degree of Master of Science in Transport, Infrastructure and Logistics (TIL) at the faculty of Civil Engineering and Geo-sciences at the Delft University of Technology.

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Video THIS is Safehaven Marine Interceptor 60 PILOT BOAT

published on 26 August 2025

While filming for the Voyager T2000, Frank from Safehaven Marine asked if I wanted to make a video about the brand new Pilot Interceptor 60. There was no way I was going to miss this opportunity!
If you would like to find out more about this boat or would like to get in touch with me about anything mentioned in this video: 👉🏻 https://linktr.ee/john_johnson 👈🏻
Voyager T2000 Yacht Tour: https://youtu.be/Z8m7mWNWGAs
Voyager T2000 sea trial: https://youtu.be/ihgjtrgV0O4

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Article Capt. Kevin Vallance awarded the Merchant Navy Medal

by Marine-Pilots.com - published on 13 November 2020

Captain Kevin Vallance awarded the Merchant Navy Medal for services to Maritime Safety.

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