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 Simplified Vector Approach for POD forces – samples and limitations

published on 23 February 2022

This movie belongs to the operation of ships with POD propellers and discusses the approach for using a vector model from only the pods’ thrust forces as resulting force to imagine the potential effect of the pods on manoeuvring motion.

1

Opinion Ladders and Liability

by Arie Palmers - published on 19 September 2026

Who pays when a pilot is injured on a ladder that should never have been rigged?
An opinion piece by Arie Palmers, maritime pilot, the Netherlands

2

Article Rumos Práticos 62 by Praticagem do Brasil published in Portuguese and English

published on 4 November 2022

In the 62nd edition of Rumos Práticos the editors visited the Paranaguá and Antonina Pilotage Zone (Paraná-PR) to portray the challenges faced by the pilots in one of the largest port complexes in South America.

3

Article What is a Portable Pilot Unit (PPU)?

by TRENZ GmbH - published on 1 April 2024

A portable pilot unit (PPU) is a portable navigation aid system designed specifically for ship pilots, such as the SIRIUS series from TRENZ in Germany (www.trenz-ppu.com).

2

Video Promo Video - Shallow Water Effects - Maritime/ Marine/ Shipping Safety Training Video.

published on 17 June 2021

'Shallow Water Effects' - The New KARCO video which promises to bring immense training value for navigators, has been developed using very effective 3D Animation &VFX.

0

Article A contempt for pilot safety and total disregard for the contents of the SOLAS Convention.

by Captain Kevin Vallance MNI - published on 4 October 2019

Tuesday, October 1st is the start date of the latest International Maritime Pilot Association's annual Safety Campaign.

Previous campaigns by the association have consistently shown results of pilot ladder deficiencies around the 20% mark.

0

Article Safe Passage - Edition Winter 2021

by Australasian Marine Pilots Institute - published on 21 July 2021

In this issue:
- Feauture Article - Threat an Error Managment
- Presidents Report
- Pilot Boat Special Reviews

1