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 Company of Master Mariners of India - Chennai Chapter, cordially invites you to a virtual meeting on "BRM During Pilotage" by Capt. Russell D'Cruz.

To monitor the vessel’s progress, the pilot had set up his portable pilotage unit (PPU). He had connected the rate-of-turn generator to the vessel’s pilot plug and had set a variable range marker on the radar with a radius of 0.5 nm.

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.

Pilotage is being able to navigate safely into and out of a harbour/anchorage/port knowing where you are at all times, where your hazards are and a safe route in/out. This is particularly useful if you are heading into somewhere new or a challenging/busy area – or both!

Ships have reported an increasing number of cases of significant GPS interference and jamming in recent months. The geographic areas with more than one reported incident include the eastern and central Mediterranean Sea, the Persian Gulf, and multiple Chinese ports.

Container vessel ALDIVIA (IMO 9333395) was dangerously close to public beach at Vlissingen Netherlands, on May 21, while heading out to sea, en route from Antwerp to Helsinki Finland.
The cause of dangerous approach is unknown, but the ship wasn’t detained, she continued her voyage.

The vessel "ELSE" didn't stopped at the pilot station and tried to enter the closed lock without a pilot.
Following the crash on 29.08.2020, the official investigations into the accident are now beginning on site.