Found on YouTube. Created by "Dleep Fotedar". Originally published on 2021-01-29.
Educational and descriptive video Join the conversation...
MH
Mike Harrison
United Kingdom
on 22 September 2023, 11:38 UTC
I'm an Engineer, not a Mariner, but the physics are fascinating and I've experienced bank effects first hand on a number of transits. Closely related issues apply to moored vessel motions caused by passing ships and there are a few great YouTube examples of the initial big surge of a moored vessel, counterintuitively towards approaching passing ship (which can render the spring lines), before the onset of yaw and sway which, more dangerously, can render or break bow/stern lines. Speed, distance, draft, seabed profile and the inclination of approach (i.e. maybe not parallel on river bend berths etc) all play a big part. I've used high end PPUs to monitor and analyse moored vessel movements and the results are fascinating, sometimes alarming as the loads can quickly exceed the winch/bollard/line capacities.
A moored vessel will continue to oscillate for a long time after the other ship passes, which slows/delays cargo transfers, even if the moorings remain intact. Ships get bigger, docks and rivers don't, so clearance and speed are the key controllable factors.
A moored vessel will continue to oscillate for a long time after the other ship passes, which slows/delays cargo transfers, even if the moorings remain intact. Ships get bigger, docks and rivers don't, so clearance and speed are the key controllable factors.
on 4 July 2022, 14:55 UTC
Good representation of the specific aspects. One other aspect that appears to left mute is the fact that it is Speed Through Water that is the important factor. Working as a Pilot in a district where neap tides rates can range between 1.5 to 3.8 knots, and with Spring Tide Rates between 2.6 and 5 knots (subject to location); it is two widely different scenarios going with the tide as apposed to against the tide.
We experience all the aspects frequently within our district.
We experience all the aspects frequently within our district.
on 30 June 2022, 16:53 UTC
This is a very clear and helpful presentation about shallow water effects etc. However, please note that the equation of Bernouilli contains v^2, meaning that all effect are in square when the vessels speed is double. In my opinion this is very important for pilots/captains to understand. Again well done!
Read more...
Video How Ship Anchor Works? - Procedure For Anchoring a Ship at Sea
published on 11 July 2020
#Anchor #shipanchor #windlass Anchoring is one of the very frequent operations onboard ships. A number of variables and external factors influence the duration and location of an anchoring operation. While the type of seabed is of utmost importance during anchoring, soft muddy grounds or clay bottoms are best preferred. It should be taken care that the anchoring bottom is free of power lines, submarine cables, pipelines or rocks. Various methods on anchoring include consideration of...
Video How port pilot sail out ship from the port? Grimaldi lines catania roro ship
published on 22 April 2022
Video OMC International - DUKC® Explained
published on 14 October 2019
Article Rumos Práticos 62 by Praticagem do Brasil published in Portuguese and English
published on 4 November 2022
Video Current threats to GNSS: An update of incidents and impacts with Guy Buesnel
published on 20 February 2021
Video Physical Pilot Ladder Simulator (Chile)
published on 2 January 2020
Article Pilot Ladder Handbook by PTR Holland (latest version)
by PTR Holland® B.V. - published on 3 February 2024
Article A Day in the life of a Mentor Pilot
by North Queensland Bulk Ports Corporation - published on 1 November 2021
Luke Sorensen began his career as a Marine Pilot in 2011. Now the Manager of Pilotage Services, North Queensland Bulk Ports (NQBP), he mentors Pilots moving through the NQBP Training Framework to become competent and confident in bringing ships into berth at our ports. Luke explains the process of mentoring.
Article Interview with Marine Pilot Esil Abibula: Crossing the Northwest Passage
by Marine-Pilots.com - published on 18 December 2019
The Northwest Passage is the approximately 5780 km long sea route that connects the Atlantic Ocean with the Pacific Ocean north of the American continent. It crosses the Arctic Ocean and its marginal seas as well as the associated sea lanes through the Canadian-Arctic archipel ago.
Roald Amundsen made his first complete successfully crossing in 1903-1906 via the route discovered by John Rae through the James Ross Strait, Rae Strait and Simpson Strait on the small ship Gjøa.
