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 The difference between Gross Tonnage and Net Tonnage

published on 14 July 2020

Using pictures and sketches, this video finally explains the difference between gross tonnage (GRT) and net tonnage (NRT); the ship spaces that are included/excluded in their calculation; and the importance of these terms to ship owners.
Contents of this video will benefit mariners preparing for exams (written and oral examinations).

0

Article Kongsberg Digital to provide the Panama Canal Authority with simulators for multi-vessel training scenarios

published on 16 April 2021

Kongsberg Digital has signed a contract with the Panama Canal Authority (ACP) to upgrade and extend the K-Sim Navigation simulators based in SIDMAR; the Center for Simulation, Research and Maritime Development of the Panama Canal Authority.

0

Article Intertanko Guide to Safe Navigation (2nd Edition-2021) released

published on 28 December 2021

Shipping has evolved significantly over the years. Research in maritime safety and operations over the past few decades has been intensive and has resulted in significant improvements.

0

Video Brazilian Pilotage Maneuver Simulation Center

published on 14 June 2022

Maneuvering ships are complex operations with high-risk involved. Just like nautical projects, they need to be simulated on training centers before approved. In a scenario of growing ships and limited waterways, state-of-the-art technology is essential to safely increase ports efficiency. That is why Brazilian Pilotage brought the most modern bridge simulator next to the maritime regulatory entities. Located a few minutes from government agencies, in the brazilian capital, our training...

1

Article Human Error in Pilotage Operations

published on 3 December 2024

This article was first published back in September 2021: Pilotage operations require close interaction between human and machines. This complex sociotechnical system is necessary to safely and efficiently maneuver a vessel in constrained waters.

0

Video Transit of the Panama Canal with an XDF LNG Carrier on the Newly expanded locks under pilotage

published on 19 December 2020

Join me as we transit through the Panama Canal from the North-East side to the South-West. An interesting vlog on how an XDF LNG carrier transits through the newly expanded Panama Canal.Find out its history and which vessel and Captain transited the Canal on its opening day on the 15th of August 1914.The interaction with the Pilot Captain Arnulfo Cepetno who assist me on transit the Cocoli locks.

2

Video Sea Shepherd - Pilot Boat - Port of Aberdeen

published on 20 October 2026

Commissioned by the Aberdeen Harbour Board the Sea Shepherd was built by the renowned Macduff Shipyards in Aberdeenshire. The vessel was designed by Murray Cormack, evolving from their highly successful "NorthBay 17" hull design. The primary design prompt called for an exceptionally rugged craft capable of handling the severe, choppy sea conditions found just outside the Aberdeen breakwater. To meet this requirement, Murray Cormack developed a single-chine displacement hull specifically...

0