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.

The Nautical Institute (NI) and the International Maritime Pilots’ Association (IMPA) have been concerned for many years at the needlessly high rate of Pilot Ladder casualties. The NI is continuously reminded of the problem from its Members and through its Mariners’ Alerting and Reporting Scheme (MARS). The issue features frequently in our publications, and we recently dedicated an edition of our award winning magazine The Navigator to the topic, emphasising the importance of good...

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.

SAMMON Lecturing Video describing
"Pivot Point Demonstration"
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SAMMON - the IDEAL tool to identify manoeuvring capabilities of a ship - SAMMON - learning the EFFECTIVE way

Over the past few years a number of pilot transfer accidents have occurred resulting from total failure of the side ropes, one school of thought is that the methods of securing a pilot ladder is a factor in such occurrences.

How to get information for wind & current limits to be potentially encountered by thrusters – or current? - this will be described in this movie:
- Measure Drift speed, due to beam wind with no propulsion;
- Measure drift speed using full thrusters
- Estimate wind & current limits to be potentially encountered by thrusters – or current...
- Finally there is a simple formula as Rule of Thumb: the transverse drift speed is about 7-8% of wind speed!

As Taiwan’s first female maritime pilot, Huang Chao-ling battles wind and waves every day as she guides ships safely into port. Her profession is high-risk and ultra-specialized, requiring years of experience at sea. Huang’s remarkable career is featured in Episode 50 of "The Soul of the Craftsman," a video series produced by the General Association of Chinese Culture. As strong winds blow and the rope ladder sways, maritime pilot Huang Chao-ling clambers up the ship, so that she can guide...

Since 2022, there is a solution in Germany that helps pilots to report defects in pilot ladders or pilot transfer arrangements quickly and easily. The apps are available for Android & iOS.