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.

With ships as large as 175 feet wide and a channel a maximum of 500 feet wide, how to you safely pass? Former Houston ship channel pilot, Lou Vest, explains how ships fight against hydrodynamics to pass with such narrow margins.
https://houstonmaritime.org

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!

Tips by Captain Kris.
kris@mes.de
krisdedecker

Visit https://www.maritimetraining.com to purchase the full-length version. Produced by Maritime Training Services.

Maritime pilots trace the roots of their profession back to the ancient Greeks and Romans when incoming ship captains employed experienced local fisherman to guide their merchant vessels safely into port. It’s a legacy of skill, strength, and sharp wits, and our Houston Pilots (“Pilots”) have been meeting vessels at Galveston’s bar to carry on these proud traditions for just shy of 100 years.

February 23, 2020.
During high seas, smaller ships board Maritime Pilots in the mass entrance to Port of Rotterdam.

(Please note: Anthony F Hoy has CASA Operational Certification for UAV Aerial Photography & Aerial Survey).
The Svitzer Marloo, a Z-Tech 2800 ASD Tug, is one of the few vessels in the world to regularly use the complex and potentially dangerous Centre Lead Forward manoeuvre to assist inbound and outbound bulk carriers in the execution of a 110 degree turn on entering and leaving Port Kembla. Tug Master Phil Jones explains how a dangerous maritime exercise, if properly executed, can deliver...