Video

Yaw Stability of Ships - Basic Principles by Knud Benedict


published on 18 November 2021 351 -

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.

Join the conversation...

Login or register to write comments and join the discussion!
FL
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.
0

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 Safety of Navigation vs. Commercial Pressure

published on 18 January 2021

Safety of Navigation vs. Commercial Pressure / ROMEILs Tv Commercial Pressures impacts the safety of the vessel, study says Seafarers are pressured to keep quiet and keep the ship moving by ship operators, who dont want to lose inccome. Ship's officers who bring safety issues to the attention of management are exposed to the risk of retaliation. As whistle-blowers they may face punishment, demotion or even termination. International Organization of Masters, Mates & Pilots (MM&P) has...

1

Article IMPA Information on Pilot Transfer Operations (May 2024)

published on 13 May 2024

This document aims to provide information to pilot organisations and/or competent pilotage authorities on the conduct of pilot transfer operations.

1

Video Maritime Pilot Training VI - Pilot Ladder Training

published on 12 May 2021

Training video VI on the correct use of the pilot ladder

0

Video Wind drift making headway - practical experiments for voyage planning and Rule of Thumb

published on 7 April 2021

Another good explaining video from Knud Benedict, ISSIMS

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 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.

2

Article Pilot Shortage is Causing Vessel Traffic Backup in China

by Maritime Direct - published on 10 November 2021

Traffic has began to become congested and slowed due to specialized river pilots being mandated to quarantine due to Covid-19 regulations when returning from duties along China’s Yangtze which happens to be the longest river in East Asia.

0