Em operação

The U.S. National Transportation Safety Board (NTSB) has released a Marine Accident Brief about an accident that occurred in March 2019, involving the towing vessel Dixie Vandal, noting that the BNWAS alarm didn't prevent the fatigued pilot from falling asleep.

As my colleagues know, IMPA conducts a “safety campaign” in the fall every year. The 2022 safety survey report was released a few days ago. First of all, we would like to thank the pilots who participated in this survey from all over the world.

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...

ER88 Sea Trials - 16m Pilot Boat: MED-P16

Research on hydrodynamic interaction indicates that if the speed of the ship near a bank is too high, the rudder may be less able to cope with the forces induced and control will be lost. The Nautical Institute highlights this in its latest Mars Report, in which an LPG carrier hit a barge being towed by a tugboat as a result of hydrodynamic forces.

This movie shows how to create the Characteristic Diagram for Wind effect on ships and limits of steerability under strong wind. It uses the previous demos made with the SAMMON Planning Software on turning tendency of ships on straight track and in turning motion.

Another video by Knud Benedict: This movie reveals some practical insight into regions of course stable / unstable conditions under wind. And I dare to say you can get some insight into other stability types and analogies, too!