"Effect of Drift Force and unstable moment"
-------------------------------------------------------------
SAMMON - the IDEAL tool to identify manoeuvring capabilities of a ship - SAMMON - learning the EFFECTIVE way
How to get information for wind & current limits to be potentially encountered by thrusters – or current? - this will be described in this movie:
- Measure Drift speed, due to beam wind with no propulsion;
- Measure drift speed using full thrusters
- Estimate wind & current limits to be potentially encountered by thrusters – or current...
- Finally there is a simple formula as Rule of Thumb: the transverse drift speed is about 7-8% of wind speed!
Another very good explanatory video by Knud Benedict. Absolutely worth seeing.
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
We we’re out on sea trials with the two newly launched Interceptor 48 pilot boats when the Port of Cork pilot boat ‘Failte’ passed by to undertake a pilot transfer from an outbound ship. It was a nice opportunity to capture some cool video of the action as the boats ran alongside before the ship turned to create a lee for the pilot to disembark. Although the seas weren’t very big, it was blowing hard at the time with gusts of over 50kts recorded at Roches PT lighthouse as we passed.