Video

Pull-Out-Test-Manoeuvre for fast Identification of Yaw Stability – and Lyster-Diagram

published on 14 January 2022 - 156 -

Show comment section |

Found on YouTube. Created by "ISSIMS - Innovative Ship Simulation". Originally published on 2021-09-28.

This video shows an introduction on the Pull-out Test-Manoeuvre and describes the procedure how to steer through this simple manoeuvre: Turning circle and then put the rudder amidships. The final rate of turn allows to identify stable and unstable conditions. Samples of stable and unstable ships will be shown by Fast Time Simulation using the SAMMON Planning tool. The role of the rudder angle of neutral effect are explained together with a comparison of Spiral test and Pull-out manoeuvres – and also for the so called “Lystergram”. The difference in stability for ahead and astern motion is demonstrated for a tanker in ballast condition.
Finally, a funny discussion of my experience in a rowing boat with my family will boost your imagination and completes the overview on effects of Yawing stability.
The next videos to follow will demonstrate other manoeuvres (Zig-Zag Test) which are also helpful to identify and discuss the yaw stability for ships.

ISSIMS GmbH
Innovative Ship Simulation And Maritime Systems

Education

What's your opinion on this?

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 Critical Ship navigation done with perfection

published on 31 January 2022

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

Video Live test: Backpack & Lifejacket?

published on 30 September 2021

When publishing articles or pictures about pilots and their pilot ladders, very often we see the use of backpacks. The use of backpacks is controversial, since its weight, or buoyancy, can influence the functioning of the lifejacket used.

Video Safety training course for German maritime pilots II -"Person over board"

published on 12 June 2026

"Person over board - all pilot boat crewmembers and pilots should be trained in recovery as realistic as possible. Don’t wait for a real emergency to find out that something doesn’t work as intended!"

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?"