How does GPS work?

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.

This video complements the earlier demonstration of wind effect on straight track and shows now wind effect on turning circles. It can be seen that during a turn under strong wind the ship reduces turning when it comes close to equilibrium on straight track - if the Wind-to-ship speed ratio is big enough then the ship even goes straight instead of turning. This is shown for three samples for Head, Stern wind and Beam wind. The turning can be increased if the ratio of Wind speed-to-ship...

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.

Port Revel is used for shiphandling training of maritime pilots, masters and officers on a 5 ha lake with 11 manned model ships representing 20 vessels, and 4 tugs at scale 1:25 and DGPS tracking system. Instructors are former maritime pilots.
Training on the scale models provides experience that could never be gained on real ships for the simple reason that neither ship-owners nor local authorities would allow such risks to be taken. Scale models allow the shiphandler to make mistakes....

Here is the latest version of the professional handbuch of "pilot Ladder Safety" for the rigging and the use of pilot ladders by Herman Broers from July 2021.

As a part of the ISTLAB project the impact of external factors on pilots’ activities in a remote pilotage situation has been examined in Rauma.

Here’s a video of recent Sea trials during ‘Storm Bram’ aboard the ‘all weather’ Interceptor 48 ‘Northeast Pilot III’ we built for the North East pilots at Newport, Rhode Island in the USA. With winds of Storm Force 11 and heavy breaking waves conditions were pretty wild, and proved a good test for her seakeeping abilities, especially her stability where she recovered nicely from a hard 90 degree knock down. Also respect to the seamanship of the captain aboard Fokko Ukena whom we filmed and...

Time for shift change. Captain Henry transferring from Pilot boat Texas City to Pilot boat Texas. Turn the sound up towards the end and hear those twin V12 Cummins sing.