Video

Yaw Stability of Ships - Basic Principles by Knud Benedict

published on 18 November 2021 - 351 -

Show comment section |

Found on YouTube. Created by "ISSIMS - Innovative Ship Simulation". Originally published on 2021-08-29.

Yaw Stability is an important element of Ships Manoeuvrability - both for course keeping and turning ability. This first video in a series explains the Basic Principles of stability in steady state equilibrium conditions and the forces / moments involved. The role of the unstable moment due to drift angel and the stabilising damping moment due to rate of turn in the yawing motion will be discussed. Definitions of yaw stability during turning motion and on straight motion will be given. Samples of stable and unstable ship behaviour will be shown by Fast Time Simulation using the SAMMON Planning tool.
The next videos will demonstrate manoeuvres (e.g. Spiral Test, Pull-out Test and Zig-Zag Test) to identify and discuss the stability condition for ships and the different aspects contributing to yaw stability.

ISSIMS GmbH
Innovative Ship Simulation And Maritime Systems

Education

Join the conversation...

Francesco Lo Nostro Italy

on 18 January 2022, 00:07 UTC

Nice explanation on turning and yaw stability. I think it’s important to consider all forces involved to the Pivot point and point of application of external disturbance, which changes according incidence of heading.

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

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.

Video New podded cruise ship at Port Revel

published on 24 October 2019

A new 1:25 cruise ship manned model, the "Voyager", was added to our fleet in 2014. She is 311 m long and is fitted with 2 azimuthing pods (and one Fixipod) and powerful bow thrusters. Training is conducted in emergency conditions like engine failures, crash stops, tight turns ...

Article 1,000 ways to secure a Pilot Ladder

by Arie Palmers, Netherlands - published on 10 January 2020

From that moment on I have been keeping a tally of the non compliant boarding arrangements I see in front of me on a daily base, and off course I participate in the annual safety campaign, conducted by IMPA each october.

Video Operation of POD Ships - Discussion on Efficiency comparing Conventional and IN-OUT POD strategy

published on 8 June 2022

In this movie the efficiency of two different pod operation strategies is compared: With azimuth propeller ships the Pods can be used in two ways to control the speed, e.g. for speed reduction: 1. by adjusting the engine orders, e.g. by reducing the RPMs to get lower speed - this means to drive the ship in the same conventional way as for twin screw vessels, 2. by turning both pods either in- or outward (TOE-IN or TOE-OUT) to reduce the forward thrust and therefore reducing the speed – the...

Video First women boat pilot for Mozambique

published on 8 September 2020

Article Pilot fell into water in Keelung Port, Taiwan. Ship’s responsible.

published on 7 November 2022

Pilot ladder broke when pilot was boarding general cargo ship CREST CRANE at night Nov 5 at Keelung Port, Taiwan, to take the ship out.

Video M+ I Poor planning & lacking Master Pilot teamwork leads to collision of ship with Jetty

published on 8 July 2020

Maritime Training Videos series by Dhhunki Productions. Contact us for production of Maritime training & safety videos,Training Shoots & Films,Incident Analysis,Case Study Videos Corporate & Ad Films,Intro-Seminar-Conference Shoots,Documentary & Short films,Music Videos www.dhhunkiproductions.com E-mail: dhhunkiproductions@gmail.com Editors Note: For people in Europe and in the days of a general me-too debate, it may seem a little strange that a male captain meets a female pilot and seems...