The difference between Gross Tonnage and Net Tonnage

This article was first published back in September 2021: Pilotage operations require close interaction between human and machines. This complex sociotechnical system is necessary to safely and efficiently maneuver a vessel in constrained waters.

When the bow thruster has been in operation for a while, pilots often notice that the ship not only turns but also gains speed. But why is this? Opinion by Capt. Hugues Cauvier.

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...

In this movie the efficiency of two different pod operation strategies is compared: With azimuth propeller ships the Pods can be used in two ways to control the speed, e.g. for speed reduction: 1. by adjusting the engine orders, e.g. by reducing the RPMs to get lower speed - this means to drive the ship in the same conventional way as for twin screw vessels, 2. by turning both pods either in- or outward (TOE-IN or TOE-OUT) to reduce the forward thrust and therefore reducing the speed – the...

What happens when GNSS fails? In maritime navigation, this isn’t a hypothetical scenario – it’s a growing risk. Spoofing, jamming, and GNSS outages are increasing, especially in the Baltic Sea region. A failure can cripple navigation systems – with potentially serious consequences.

Earlier this year ABP announced an investment of around £9 million to build nine new pilot boats. These vessels were ordered from Goodchild Marine Services Limited and are being built in Norfolk along with much of the supply chain coming from East Anglian suppliers.

The pilot plays a crucial role in the safe navigation of the vessel to her destination. Expert in the local waters, a Pilot is imperative to the Bridge Team. Berthing/un-berthing, anchoring, transiting narrow channels etc. are very specialized operations and require expertise of a very objective manner that results in efficient planning, monitoring and execution of safe passage. When a ship needs to enter or leave a harbor, marine pilots are sent aboard via a small pilot boat to safely...

A cargo ship is guided into Port by the Pilot boat on a breezy February morning- Filmed with a Sony RX10 Mk iv
Ship - Fast Sim
Port- Shoreham

This is a short documentary done in the 1980s of San Diego Harbor Pilots. It shows the old pilot boat built in 1914. The boat was donated to the Maritime Museum and provides daily bay rides for the public. The film shows arrival of the cruise ship SS Azure Seas.