Video

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

published on 26 November 2021 - 259 -

Show comment section |

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.

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 Technical Seminar - The role of the Habourmaster by The Nautical Institue

published on 29 November 2022

The SW England Branch debates the varied and critical role of the Harbourmaster.

Article How many Navy vessels are compliant to SOLAS ch.V reg23?

by Arie Palmers - published on 25 April 2022

A 1,000 Navy Vessels around... Quite often those vessels have the tendency of presenting themselves with a pilot transfer arrangement which is non-compliant.

Opinion New guidance for PBAs with trapdoors. Released 4.11.2020 by NZMPA

by New Zealand Maritime Pilot's Association - published on 6 November 2020

New guidance for PBAs with trapdoors. Released 4.11.2020 at NZMPA Conference in Dunedin, NZ. Distinct difference to suggestions in many other countries, is that we challenge operators who have the ladder suspended from the accommodation ladder (gangway) and not secured to the ship. SOLAS states that pilot ladder shall be secured to the ship, and securing strongpoints, shackles and ropes shall be as strong as the sideropes.

Article Overview of Associated British Ports Marine Pilot Apprenticeships

published on 8 November 2020

by Rhys Davies, current Apprentice. Published already in Feb. 2020 by ABP.

Article Investigation of ship maneuvering with hydrodynamic effects between ship and bank

by Marine-Pilots.com - published on 12 July 2021

When a vessel navigates in confined waters, such as in a harbour or narrow channel, it is well known among experienced pilots that the ship handling is greatly affected by the hydrodynamic forces and moments acting between ship and bank or sidewall of the channel.

Article Mapping Safe Maritime Pilotage: Understanding Complexity in Maritime Pilotage

by University of York - published on 9 February 2026

University of York: Here, Dr Kate Preston explains why we need to fully understand the complexity maritime pilotage before we can integrate technology like autonomy.