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.

"ISSIMS GmbH - Marine Prediction Technology" SAMMON Lecturing Video describing "Theory behind turning dynamics of ships" ------------------------------------------------------------- SAMMON - the IDEAL tool to identify manoeuvring capabilities of a ship - SAMMON - learning the EFFECTIVE way Comment by Gunter Schütze via LinkedIn: "Prof. Benedict a very interesting video by HS Wismar / Maritime Simulation Center Warnemünde ( MSCW) & Innovative Ship Simulation and Maritime Systems GmbH...

OHB Digital Solutions GmbH develops systems for monitoring the GNSS frequency bands as well as detection, classification and localization of intentional or unintentional interference sources. Many stakeholders and applications as well as critical infrastructure providers are relying on GNSS to provide their services. Since Global Navigation Satellite Systems (GNSS) are widely used in safety and value critical applications, GIDAS detects, classifies and localizes any GNSS interference...

Manoeuvring large ships at close quarters and on shallow water is one of the most difficult aspects of shiphandling because of the complex hydraulic interactions depending on the ships' speeds, on the water depth and on lateral restrictions like in canals. Training is conducted both on meeting and on overtaking ships in shallow waters. This video shows how overtaking in a canal can easily fail.
More information: http://www.portrevel.com/3781-shiphan...

Required tug power and number of tugs needed in variable conditions of wind, current and waves isin most cases an assessment made by pilots based on their professional experience. However, assessments will raise questions by lawyers if something goes wrong. They will use tools to calculate what really is needed with respect to tug power and number of tugs. They have furthermore the advantage of time.

On April 20, 2026, the Columbia River Bar Pilots conducted a MOB drill with the U.S. Coast Guard Station Astoria.

Our Pilot Boats play a crucial role in maintaining the daily flow of maritime traffic to and from Belfast Harbour. Working 24/7, 365 days a year, in all kinds of weather conditions, this dedicated team carries out the vital task of bringing the Harbour Pilots out to arriving vessels, where they guide them safely into their berths, as well as disembarking them, often in challenging sea conditions on Belfast Lough.
Kayleigh Ward, our sole female pilot boat crew member, reveals how she gave up...

Time Lapse Video: An inbound LNG carrier arrives at the Port of Rotterdam. At sea, in the Eurogeul channel, two maritime pilots have joined the vessel. Between the breakwaters four harbour tugs (Smit Harbour Towage) make fast to assist her manoeuvre. In the Beerkanaal channel the LNG carrier is stopped and swung before entering the Nijlhaven harbour. While approaching LNG Jetty 1 the ship's mooring lines are taken ashore by mooringboats (Koninklijke Roeiers Vereeniging Eendracht).
Pilot...