Video

Zig-Zag-Test-Manoeuvre for Yaw Stability, IMO Manoeuvring Standards and Crash Stop


published on 26 November 2021 259 -

Found on YouTube. Created by "ISSIMS - Innovative Ship Simulation". Originally published on 2021-11-25.
This video is now the last of the Yaw Stability series. It shows an introduction on the Zig-Zag-Test-Manoeuvre and describes the procedure how to steer through this periodic rudder manoeuvre, switching the rudder depending on the heading change. Some characteristic parameters are explained, specifically the overshoot angles following counter rudder are suitable to decide on stable and unstable conditions as part of the IMO Standards for ships manoeuvrability.
Samples of stable and unstable ship behaviour demonstrations will be shown by Fast Time Simulation using the SAMMON Planning and the SIMOPT tool. The results are discussed with respect to the IMO limit values. Finally, the effect of yaw stability on the tracks of Crash Stop Manoeuvres are discussed, demonstrating the impact of small turning rates when starting to reverse the engines.
What's your opinion on this?
Login or register to write comments and join the discussion!
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 Maritime Pilot Training V - Pilot Ladder Training

published on 12 May 2021

Training video V on the correct use of the pilot ladder

0

Video IMPA Seminar on Maritime Pilots and Pilotage

published on 10 November 2022

The Seminar aims to inform Member States, intergovernmental organizations and non-governmental organizations in consultative status with IMO about the societal value of maritime pilots and pilotage as a public service. The IMO Secretary-General has recognised maritime pilots as having always been vital to ensuring the safety of navigation in key ports and shipping lanes globally and playing a crucial role in sustaining the global supply chain using specialized knowledge and expertise....

1

Video Characteristic Diagrams for ship behaviour under Wind Impact

published on 12 April 2021

This movie shows how to create the Characteristic Diagram for Wind effect on ships and limits of steerability under strong wind. It uses the previous demos made with the SAMMON Planning Software on turning tendency of ships on straight track and in turning motion.

0

Opinion Scientific Fact: The ‘traditional’ understanding of the ship’s pivot point is wrong!

by Tim Cummins, Harbour Pilot, Portsmouth International Port - published on 9 July 2020

In fact, the pivot point that we “see” is a trick of the eye, it looks like the ship is rotating about this point but in fact it is elsewhere, a point that you cannot see.

Article Securing pilot ladders at intermediate lengths

by Kevin Vallance deep sea pilot and author - published on 6 January 2020

Over the past few years a number of pilot transfer accidents have occurred resulting from total failure of the side ropes, one school of thought is that the methods of securing a pilot ladder is a factor in such occurrences.

0

Video Thrilling Sunrise Mission at the Port of Tyne

published on 11 April 2025

An unforgettable sunrise at sea as the pilot boat Hadrian delivers a pilot to the Grampian Tweed on approach to the Port of Tyne! With the sky blazing in incredible colours, we head out at first light to meet the Grampian Tweed offshore. Watch as the Hadrian carefully manoeuvres alongside to safely transfer the pilot, all against the backdrop of a stunning North Sea sunrise. This is a true behind-the-scenes look at life on the water — ship handling, teamwork, and breathtaking views from the...

0

Video The Hair-Raising Career of a Chesapeake Bay Pilot

published on 15 September 2020

Chesapeake Bay pilots guide massive cargo ships safely through the Bay's channels every day, but boarding them on a ladder attached to a moving ship is nothing short of breathtaking. Watch the video from a retired Bay Pilot.

0