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
Opinion Maritime Pilotage - Yesterday, Today and Tomorrow
by André Gaillard - published on 17 February 2021
Video Quadcast: EVER GIVEN a physical disruptor: Part 1
published on 29 April 2021
Video Different methods of steering, navigating and maneuvering the Celebrity Edge
published on 3 January 2022
HOW WE DRIVE- Different methods of steering, navigating and maneuvering the Celebrity Edge, a 130,818 gross ton, 306 meter, $1.2 billion dollar new luxury liner. When we’re underway and I walk around the ship and guest's see the Captain, the question I get asked ALL. THE. TIME is “If you’re here, who is driving the ship”. The answer is the Officer of the Watch. We have a minimum of 3 very qualified and licensed officers manning the bridge at ALL times. 3 separate teams rotate every 4...
Article St. Andrew’s Bay Pilots Mourn the Loss of Captain Phillip Brady
by Florida Harbor Pilots Association - published on 16 January 2026
Video OXE Marine in Indonesia
published on 13 May 2025
Video Pilotage with PPU (Portable Pilot Unit) - Indonesia
published on 16 December 2021
Video Dali Timeline from Data Recorder in Striking Francis Scott Key Bridge in Baltimore, March 26, 2024
published on 4 April 2024
Dali Timeline What's Going on With Shipping? March 29, 2024 In this episode - maritime historian at Campbell University (@campbelledu) and former merchant mariner - discusses the timeline released by the NTSB from the Dali's Vessel Data Recorder and lays out some of the questions, issues that have been raised, and questions that need to be answered. #dali #baltimorebridge #baltimore #shipping #brdigecollapse #supplychain #containerships #containerships Support What's Going on With...
