According to author Captain Henry H. Hooyer, forces acting on the ship have an effective lever arm with respect to a hypothetical pivot point. The forces creating or affecting this pivot point include the ship's motion, underwater resistance, and momentum. The book will be particularly helpful to pilots and ships' officers, and those whose jobs require a thorough understanding of ship behavior.
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Video Pivot Point Demo - HS Wismar
published on 10 July 2020
Article Combinations Ladders: "1,000 combinations around" (by Arie Palmers)
by Arie Palmers, Netherlands - published on 13 July 2020
Video Salvage operation EEMSLIFT HENDRIKA
published on 8 April 2021
Video The difference between Gross Tonnage and Net Tonnage
published on 14 July 2020
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).
Video Launching Pilot Boat Indonesia
published on 21 February 2023
Opinion Sea Trials in Stroms at the Entrance to Cork Habour
by Safehaven Marine - published on 3 March 2020
The entrance to Cork Harbour situated on the South coast of Ireland can produce some pretty extreme sea states during the winter storm months. There are two main factors that influence the sea state at the entrance, the first being the ebbing tide, the second being shoaling waters over the Harbour Rock, this is situated at the entrance to the Harbour off Roches Point lighthouse, right in the middle between the Western and Eastern channel entrances.
Video 18 meter pilot boat built by Hart Marine, with ZF Marine Transmission
published on 28 February 2020
Video History: Trinity House Buoys (1966)
published on 18 May 2020
Harwich, Essex. Several shots of buoys at a warehouse on the quay. Various shots show the Trinity House Vessel 'Siren' setting out to sea to carry out maintenance on buoys; a naval flag showing the Union Jack and the Trinity House Jack is hoisted; officers are seen using sextants and plotting their course on a chart. Nice M/S of a sailor tying on a life jacket. Sailors drop anchor beside a buoy, hoist weather balloons and ring bells on the ship. The buoy is cleaned of mussels and limpets...