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.

There are many things in both our everyday and professional lives which we take for granted and never question the origins of, an example of this might be the IMPA recommended ‘pilot mark or pilot line’, which is sometimes seen on the side of vessels indicating where a vessels freeboard exceeds 9 metres.

This video has already been published for the first time in 2020. Please also note the second, more recent video in the appendix. This physical ladder simulator was designed for crew training in the ladder arrangement and for all the users especially for pilots.

The Varna Pilot Station in Bulgaria has chosen Seably, the global online marketplace for bespoke maritime learning, to become the first pilot station to use the digital platform for its training.

Another valuable explanatory video by Knud Benedict:
Zig-Zag-Test-Manoeuvre for Yaw Stability, IMO Manoeuvring Standards and Crash Stop

The latest summary from PTR Holland on the subject of pilot ladders. Here is the most important information on maintenance, use and replacement & insepection record book.

Goodchild ORC 171 Pilot Boat "Ouse" recently delivered to Associated British Ports (Humber)

The Viking Mars is a brand new cruise ship, built this year (2022). While it is a relatively small ship when it comes to cruise liners, it's still an imposing vessel. It's big enough to enable them to fit a planetarium, fitness center, hair salon, a spa, and the usual shops, restaurants and cabins. We have filmed quite a few vessels coming in and out of Holyhead port now, and the Viking Cruise Line ships are, without doubt, some of the most classy and good looking vessels about. Lovely...