Video

Interaction Bank Effect


published on 30 June 2022 1021 -

Found on YouTube. Created by "Dleep Fotedar". Originally published on 2021-01-29.
Educational and descriptive video

Join the conversation...

Login or register to write comments and join the discussion!
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.
0

Mr. Frikkie Viljoen ABP - Humber Estuary Services, United Kingdom
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.
1

Captain Robert de Roos Loodswezen Rotterdam - Rijnmond, Netherlands
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!
2

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...

1

Video How port pilot sail out ship from the port? Grimaldi lines catania roro ship

published on 22 April 2022

In this video I will show you Grimaldi Lines Catania RoRo Ship

0

Article Pilot Transfer Arrangements and new Regulations

by Captain Jesus Señeriz Lopez - published on 4 February 2020

As we all know there is a new regulation established since July 2012, this new regulation refers to pilot transfer arrangements. There are other yearly safety campaigns such as IMPA that include SOLAS V.23 and IMO Resolution A 1045 and Resolution A.1108(29). Unfortunately, in this annual overview there were some accidents reported that could have been avoided.

0

Article New Study on GNSS Interference in the Baltic Sea

by GPSPATRON Sp. z o. o. - published on 12 March 2025

GNSS interference has become a growing challenge in the Baltic Sea, affecting maritime navigation, aviation, and critical infrastructure. While numerous datasets and services, such as gpsjam.org, spoofing.skai-data-services.com, and flightradar24, report high-altitude GNSS interference based on ADS-B data, there is a significant lack of studies focusing on ground-level interference.

3

Video Tug Boat and Pilot in Sorong

published on 25 August 2022

0

Video Jersey: Pierre Chays, Harbour Pilot and Marine Safety Manager

published on 27 May 2020

In the second of our series focusing on ‘Our people at ports’, we catch up with Pierre Chays, our Marine Safety Manager and Pilot who gives us a behind the scenes look at what our Harbours Team is doing during these difficult times in supporting the movement of essential freight services in and out of the Island. For him, it is very much ‘business as usual’ – and outside of his working hours he’s getting used to having another baby around the house.

0

Opinion Piloting in a Pandemic – A Personal Perspective

by William Hargreaves - published on 25 March 2021

Article and pictures by Captain W J M Hargreaves, Retired Southampton Pilot

0

Video Jacobsen Pilot Service's New Pilot Boat - The Orion - at the Port of Long Beach

published on 23 January 2021

Jacobsen Pilot Service, the Port's pilot service since 1924, has acquired a new state-of-the-art pilot boat, The Orion. Learn all about The Orion in this video.

0