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There are many things in both our everyday and professional lives which we take for granted and never question the origins of, an example of this might be the IMPA recommended ‘pilot mark or pilot line’, which is sometimes seen on the side of vessels indicating where a vessels freeboard exceeds 9 metres.
Using pictures and sketches, this video finally explains the difference between gross tonnage (GRT) and net tonnage (NRT); the ship spaces that are included/excluded in their calculation; and the importance of these terms to ship owners.
Contents of this video will benefit mariners preparing for exams (written and oral examinations).
A handy and simple tool to determine in a minimum time what is really needed as tug assistance, is the Bollard Pull Calculator which calculates in an approximate way the total required tug power for ships in various conditions of wind and current. This tool can be loaded as an app on the smart phone.
Here’s some cool video footage we captured of the Cork Pilots in their Interceptor 48 pilot boat ‘Failte’ undertaking pilot transfers off Cork Harbour during the recent days of strong SE gales. Roches Point lighthouse recorded 50kts of wind on the 13th as the Cosco bulk carrier passed and the Cork wave buoy 2nm off the harbour entrance recorded waves to 6.7m at the time. The pilot boat coxwain managed to get alongside and safely disembark the pilot despite the challenging sea state....
Understanding the fundamentals of the pivot point is highly required for understanding the alteration of the courses. Pivot point is an imaginary point on the vessel which turns on a circular path on the perimeter of vessel’s turning circle when the vessel makes a turn. The knowledge about the position of the pivot point in a manoeuvring situation provides the ship handler with the information on the geometry of motion of the ship.