Video

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

published on 7 April 2021 - 254 -

Show comment section |

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

ISSIMS GmbH
Innovative Ship Simulation And Maritime Systems

Education

Join the conversation...

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!!

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

Video Maneuvering information onboard - Pilot Card, Wheelhouse Poster and ...

published on 14 July 2020

This video explains the IMO resolution on the provision and display of maneuvering information on board ships, particularly the pilot card, wheelhouse poster and maneuvering booklet. the layout and contents of each are explained as well. Contents of this video will benefit mariners preparing for exams (written and oral examinations). Mariners will also benefit by watching the following videos: Duties of the SAR mission coordinator: https://youtu.be/9J3q6XczIGE Duties of the on-scene...

Video Next Generation ECDIS

published on 2 November 2020

Next generation of Navigation. This video shows the new technologies put up on Navigation. #ecdis #lifeatsea #seafarer

Video First women boat pilot for Mozambique

published on 8 September 2020

Video Discussion on Wind effect - drifting with no propulsion, only thrusters

published on 11 July 2020

Theory on Wind drift will be shown together with demos using SAMMON planning on the effect of thrusters to have some effect on drift speed & direction

Opinion Scientific Fact: The ‘traditional’ understanding of the ship’s pivot point is wrong!

by Tim Cummins, Harbour Pilot, Portsmouth International Port - published on 9 July 2020

In fact, the pivot point that we “see” is a trick of the eye, it looks like the ship is rotating about this point but in fact it is elsewhere, a point that you cannot see.