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
Article Book launch: “Marine Pilotage – The Arabic book”
published on 22 May 2021
“Marine Pilotage – The Arabic book" by Ahmed Sati, Marine Pilot at P&O Maritime, is the first of its kind in Arabic language and specifically concerned with maritime pilotage, it is a reference book and introduction to the basics of the Marine Pilot's work for Arabic readers who are willing to take the challenge and join the force of Pilotage and to act as a refresher to the experienced Pilots who are practicing Pilotage in local or foreign organizations.
Video Recorded Webinar: Pilot Ladder safety and Pilot Transfer procedures
published on 15 October 2020
Video Stern-First Method for POD Ships –Practical samples starting with Twin screw followed by POD ships
published on 12 August 2022
Practical samples for manoeuvres for ships going astern - as Stern-First-Method SFM. Introduction using as sample from the Master Thesis by Karel Wiegert for an arrival manoeuvre of a cruise vessel in Southampton port with a Twin-screw vessel under strong current. The same manoeuvre with the same ship model was used to show the advantage of Fast Time Simulation FTS using the SAMMON Planning Tool. This goes much faster than the manoeuvres in the real time simulator - and it can even be...
Video Very descriptive: Piston Effect when entering lock.
published on 10 May 2020
Two new locks were introduced in 2009 for training in the new Panama lock conditions with or without tug(s). This video shows the famous "piston effect" when entering the lock at an impressive speed of 10 knots with a high blockage factor.
Port Revel provides shiphandling training using manned models for maritime pilots, masters and officers: http://www.portrevel.com
Article The NZMPA Good Practice Guide for Pilots 2021
published on 4 April 2022
The Good Practice Guide for Pilots 2021 describes the knowledge and skills (technical and non-technical) that the NZMPA believe all pilots should aim to achieve and maintain. It is written primarily for pilots for their own guidance and professional development, but can be used as a framework for pilot training, proficiency and assessment. It is referenced to NZ Maritime Law and Codes.
Article NTSB Reports on Collision between Baxter Southern Tow and BNSF Coal Train
published on 19 September 2022
Video Marine Alutech Watercat 160 Pilot
published on 16 November 2022
The first of three Watercat 160 Pilot was delivered to the Finnish Finnpilot Pilotage Ltd. in spring 2022. This PILOT boat has a self-righting ability as well as the ability to sail in surface ice of up to five centimetres thick. It can also be operated in deeper offshore waters to accommodate transfers of pilots to deeper-draught ships. The Watercat 160 Pilot can operate even in more restrictive inner harbour waters. The bow has D-type rubber fendering while the hull sides are equipped...
