1. A Quick Guide Session Two
Speed Charts
A Quick Guide
Session Two

2. Recent Changes
Normal Trapezoid is “Olympic” version with separate finish
Youth Charts have had IX/OX course configurations added
Primary Leg length is nm with metres conversion
Last update was March 2017

3. Useful to calculate expected times at each mark

4. Beat Length is ~0.65nm (just a bit more)
Beat Time is 9.8mins, Run 4.9 mins so Mark 1 would be 10 minutes

6. Dayboats & IRC Classes In same area as Speed Charts (Data Reference)
Graphs of VMG vs Wind Speed for Dayboats and IRC Classes
Charts to then give distance from VMG and time
A guide to their use is included in the spreadsheet

9. Given a course size in nm (total distance) how long does it take to do X laps or
Given a race duration in time and VMG, what course size (total) is required

10. Speed Charts