Video

Spiral-Test -Manoeuvre for detailed identification of Yaw Stability using Samples of Cruise Ship

published on 29 September 2021 - 92 -

Show comment section |

Found on YouTube. Created by "ISSIMS - Innovative Ship Simulation". Originally published on 2021-09-01.

This video shows an introduction on the Spiral-Test-Manoeuvre and describes the procedure how to steer through this manoeuvre and measure the data needed. The results will be displayed in a characteristic diagram allowing to identify stable and unstable conditions and related, detailed information, e.g. spiral loop width and height, rudder angle of neutral effect. Samples of stable and unstable ship behaviour demonstrations will be shown by Fast Time Simulation using the SAMMON Planning tool. Finally, a discussion of of ship’s hull form with loading conditions and elements like appendages completes the overview on effects of Yawing stability.
The next videos to follow will demonstrate other manoeuvres (e.g. Pull-out Test and Zig-Zag Test) which are also helpful 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

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

Opinion Snakes or Ladders

by Ewan Rattray, UK - published on 12 March 2021

A MIXED METHODOLOGY REVIEW INTO THE BOARDING AND LANDING OF MARITIME PILOTS.

Video So Long Solina! The Local Captain Takes His Leave November 2, 2021

published on 9 February 2022

A more unique angle regarding freighter departures; I was able to film the routine disembarking of one of our local ship captains and officers after piloting Solina out of the harbor. This is a required procedure, as per US Maritime Laws, all international freighters must be piloted in and out of a US harbor by a US Captain. Here we have out local pilot vessel Sea Bear running up alongside the Solina to allow the two officers to depart the freighter before she heads out across Lake Superior

Article Reminder: The 134th UKMPA Conference

published on 1 September 2022

Program, Speakers & Booking here

Video Suezmax Tanker Northbound İstanbul Strait

published on 22 September 2020

www.turkishpilots.org.tr , Maritime Pilot , Turkish Straits , İstanbul Strait

Article Kiel Pilots Operating on Emergency Basis

published on 3 June 2024

Since October, pilots from Kiel have been unable to use their offshore transfer station. Long detours and limited rest periods have complicated their workdays, with no end in sight.

Article Hong Kong pilotage dues set to rise for the first time since 2016

published on 20 October 2022

The Hong Kong Pilotage (Amendment) Bill 2022, which was gazetted on 14 October, provides for an adjustment to pilotage fees and clarification of the regulations governing pilot medical examinations.

Video TRENZ PPU SIRIUS - New Generation Portable Pilot Unit

published on 18 February 2025

TRENZ proudly present you the next generation portable pilot unit. "SIRIUS" has been redesigned to allow more functionality and precision now and new features in the future. www.trenz-ppu.com SIRIUS Features: High-precision Rate of Turn (ROT) achieved through dual gyroscope and accelerometer integration, utilizing the TRENZ Sensor Fusion algorithm Standard-precision GNSS receiver supporting four concurrent constellations (GPS, GLONASS, Galileo, Beidou) and augmentation via SBAS Advanced AIS/...