time on time

A good post on a subject that most of us have no idea…

Our club is going to use ToT scoring this year. We plan on using the 3 B factors for light, medium and heavy air. We are wondering:

  • What wind speed should be attributed to Light, Medium and heavy?
  • How do you determine the strength? From the signal boat? Mast head reading?
  • When do you determine the wind strength? At the start? Mid race?
  • How do you select the B factor with a building or dying breeze?

Any knowledgeable guidance would be appreciated.