Video

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


published on 7 April 2021 254 -

Found on YouTube. Created by "ISSIMS - Innovative Ship Simulation". Originally published on 2021-03-08.
Here are described some experiments to get data for voyage planning:
- how to measure wind effects and prepare ship specific diagrams to estimate required drift angles and also rudder angles for wind balance
- to be applied for voyage planning, considering expected operational conditions, specifically for preparing manoeuvring plans for Port arrival and departure planning!
- analysing theses data a simple formula could be derived to calculate the drift angle ß depending on absolute wind speed VA, encounter angle aA and ship speed Vs to:
ß= arctan (CD*(VA +Vs*cos aA)*sin aA)/Vs)
And all this is demonstrated by means of the unique SAMMON Planning software based on Fast Time Simulation of ship manoeuvres...
Enjoy, share and give some thumbs up, if you are satisfied with the movie - and my haircut!
Knud Benedict

Join the conversation...

Login or register to write comments and join the discussion!
SO
Mr Sean O’Toole ABP - Associated British Ports, United Kingdom
on 7 April 2021, 16:13 UTC

In my experience, a ship moving ahead, rudder amidships, the ship will develop a rate of turn into the wind. However the first manoeuvre on this simulator with rudder midships does not show this, in fact no RoT at all. Quite often at work, I will tell the bridge team I am about to start a turn to starboard/port, order midships and then try to crack a joke about the ship has been here before and knows where to go!!
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 Electronic Chart Standards: IHO ECDIS and ENC

published on 29 October 2019

Tom Mellor - C​hairman of the IHO Electronic Navigational Chart Working Group (ENC WG) and Head of Digital Standards at the UKHO - explains what the IHO's ECDIS and ENC Standards mean.

0

Article Securing pilot ladders at intermediate lengths

by Kevin Vallance deep sea pilot and author - published on 6 January 2020

Over the past few years a number of pilot transfer accidents have occurred resulting from total failure of the side ropes, one school of thought is that the methods of securing a pilot ladder is a factor in such occurrences.

0

Video Chart Projections and Chart Accuracy - ECDIS

published on 11 July 2020

With the increasing accuracy and reliability of navigational receivers, this part of the video module will try to establish a better understanding of the mathematical definition of the Earth’s surface and mapping of this curved shape onto a plane surface. Chart Projections and Chart Accuracy https://youtu.be/kOaWimnAN-U Principle Used For Creating Electronic Charts https://youtu.be/xY_MBubhUFs Display of Electronic Charts https://youtu.be/qnoFO0T-cLo Route Planning With ECDIS https://...

0

Video MAN ME-C and MAN ME-B Online Training

published on 23 April 2021

We have successfully implemented and tested our new online engine simulator trainings. Currently we offer four online trainings. - MAN Engines Operation and Analysis (ME) - MAN ME Engine Electrical Course - MAN ME-B Engine Operation and Analysis - MAN ME-B Engine Electrical Course Find more information and current schedules on https://mtc.hamburg/training Music: Better Day by BatchBug | https://soundcloud.com/batchbug Music promoted by https://www.free-stock-music.com Creative Commons...

0

Opinion What is a Tug's Bollard Pull and How İt is Calculated?

by Capt.Alpertunga Anıker - published on 24 November 2022

The Bollard Pull value, which can be interpreted as the maximum thrust that is developed for a specific amount of time by the propulsion systems of any vessel to the fullest , when it has zero speed in the forward direction, is the criterion that allows us to understand how suitable a tugboat is for a port maneuver or a towing operation.

3

Video Collision with Holtenau high bridge (Video in German)

published on 2 December 2022

Kollision mit Holtenauer Hochbrücke / NDR Schleswig Holstein Magazin 19:30

0

Video DNV GL Identifies ‘Safety Gap’ as Maritime Transforms

published on 19 February 2021

As the marine industry digests decarbonization, digitalization and autonomy, DNV GL warns that a keen eye must stay on identifying and mitigating safety risks.

0