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How GPS works? Trilateration explained


published on 4 July 2019 184 -

How GPS works? Trilateration explained
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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 Wind Balance on straight track with theory

published on 24 November 2020

Wind Balance on straight track - using SAMMON to learn the theory and the effect of rudder and drift to reach the balance in steady state equilibrium conditions on straight track. Limits of steerability will be shown and how turn under strong wind.

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Article Navigation alternative in the event of GNSS failure due to jamming or spoofing

by TRENZ GmbH - published on 7 April 2025

What happens when GNSS fails? In maritime navigation, this isn’t a hypothetical scenario – it’s a growing risk. Spoofing, jamming, and GNSS outages are increasing, especially in the Baltic Sea region. A failure can cripple navigation systems – with potentially serious consequences.

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Article 1,000 ways to secure a Pilot Ladder

by Arie Palmers, Netherlands - published on 10 January 2020

From that moment on I have been keeping a tally of the non compliant boarding arrangements I see in front of me on a daily base, and off course I participate in the annual safety campaign, conducted by IMPA each october.

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Opinion Pilot safety: a crucial component of navigation safety

by MS Amlin Marine - published on 22 October 2024

The latest MS Amlin Marine circular, compiled by theTechnical Loss Prevention Consultant Peter van der Kroft, focuses on the importance of pilot safety in marine navigation.

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Video Pilots Training in Brazil

published on 24 June 2022

Operators and supervisors of the operations center (atalaia) of Praticagem da Barra do Rio Grande participated in an update course in online and face-to-face mode. They had classes on nautical charts, electronic charts (ECDIS), radars, portable pilot units (portable electronic navigation equipment) and technical English. "There is no good operation without recurrent training with good tools", says pilotage operational director, practical Bernardo Ramos

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Article Associated Federal Pilots Orders Launch From Gladding-Hearn

published on 13 November 2020

The Associated Federal Pilots in Metairie, LA, has ordered a Chesapeake Class pilot boat from Gladding-Hearn Shipbuilding, Duclos Corporation. The pilots’ first launch, built by the Mass.-based shipyard, is scheduled for delivery in July 2021.

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Article Marking, Certification of Pilot Ladders

by Herman Broers - published on 5 January 2021

The name tag plate on this ladder displays a few important items that can be cross referenced with the certificate: Type, Model, Length, Production date, as well as the serial number (Prod.No) and the approval standard.

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