Video

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


published on 7 April 2021 228 -

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
Sean O’Toole 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

Article SWATH & SWASH Technology - Smoother pilot boarding

by Marine-Pilots.com - published on 3 July 2020

SWATH and SWASH are interesting technologies that allow a vessel to sail much more calmly in high waves. A stable and calm position of the ship is especially important for pilot boarding.


0

Video Retired Houston channelpilot Lou Vest: "My Maritime Story"

published on 3 November 2020

Ships don't exactly have brakes. Lou Vest, a retired Houston ship channel pilot tells us about a close encounter between a ship and a barge.
https://houstonmaritime.org

1

Video The Insane Amount of Power a Ship Propeller Requires to Spin

published on 16 December 2021

A feature on the vital component that moves a heavy vessel - the propulsion system. With some ships carrying hundreds of tons of cargo, it requires a robust propulsion system to propel the massive vessel across the vast ocean.

0

Video Failed overtaking of another ship in a canal - Port Revel Shiphandling

published on 10 May 2020

Manoeuvring large ships at close quarters and on shallow water is one of the most difficult aspects of shiphandling because of the complex hydraulic interactions depending on the ships' speeds, on the water depth and on lateral restrictions like in canals. Training is conducted both on meeting and on overtaking ships in shallow waters. This video shows how overtaking in a canal can easily fail.
More information: http://www.portrevel.com/3781-shiphan...

0

Video How Stabilisers Reduce A Ship's Roll

published on 4 July 2019

Stabilisers are used to reduce the amount of roll experienced by large ships.
In this video, we look at a few different stabilisation techniques. We investigate how different methods work and how successful they are at reducing a roll.

0

Article Effects of the Chinese New Year on the global ship traffic

by Simone Moser, LuxSpace Sàrl - published on 29 January 2020

This year, the Chinese New Year holiday celebrates the year of the Rat. The Chinese New Year, also known as the Spring Festival or Lunar New Year is celebrated by more than 20% of the world’s population. More than that, it is also the longest seasonal holiday in China. Most of the population saves up its annual holidays to take a few weeks off and spend time with the family.

0

Video EfficientFlow - STM in ports and narrow waters

published on 22 September 2020

Improved traffic flow converts waiting times into increased safety and bunker savings for large ships in the narrow Swedish and Finnish archipelagos.
Found on YouTube. Created by "Sjöfartsverket".
In the STM EfficientFlow project, the Baltic ports of Rauma and Gävle implement efficient port calls using real-time information. Improved traffic flow converts waiting times into increased safety and bunker savings for large ships in the narrow Swedish and Finnish archipelagos.

1