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

Video SImulator Training

published on 2 February 2022

Practicing in the new port before we have todo it for real.

0

Opinion Pilot ladders: Compliance by design, failure by operator

by Herman Broers - published on 10 March 2022

It is not often that this blog is used to show bad practice, however in this case some pictures tell a whole story. Ship is compliant by design for rigging a combination. How about the operator(s)?

1

Video SAMMON Demo Planning FtLauderdale Arrival with comments

published on 20 January 2021

This updated video shows how easy it is to develop an arrival plan with the SAMMON Planning Tool. As a sample the arrival from appraoch until the berth to Ft. Lauderdale is used under strong current of 2kn. At the simulator training courses where we used this tool for preparation of a manoeuvring plan during the briefing sessions all nautical officers involved stated afterwards: "Why don't we have this tool on our ships?"

0

Article Improving Teams Performance in Pilotage Waters

by Herman Broers - published on 31 March 2022

This paper aims to explore the possibilities of improving team performance on the bridge in pilotage waters. The pilot and the bridge team have a common goal: to navigate the ship safely and smoothly.

0

Video Next Generation ECDIS

published on 2 November 2020

Next generation of Navigation. This video shows the new technologies put up on Navigation. #ecdis #lifeatsea #seafarer

1

Video Ice going pilot boat by Baltic Workboats

published on 3 June 2020

Baltic Workboats 16m ice going diesel electric pilot boat

0

Article Louisiana pilots launch state diversity initiative

published on 24 January 2022

"Last legislative session, river pilots committed to making African Americans and other minorities aware of the growing number of career opportunities in Louisiana's maritime industry," said river pilot Captain Lee Jackson in a statement.

0