Forum: The Racing Rules of Sailing

Portsmouth Yardstick

Satish Kumar Kanwar
A race for Optimists, ILCAs and 420 needs to be conducted. using Portsmouth Yardstick. I solicit the forum members to guide me with any SIs or NoR instructions which will be helpful in the conduct of the races. What yardstick should be followed as there is no historical record of the boats performance is available in this format of racing. Any other issues which merit attention may also be highlighted.
Created: Today 13:19

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Angelo Guarino
Forum Moderator
Nationality: United States
Satish ... may I ask ... why are you not scoring them within their OD fleets instead of attempting to combine them?
Created: Today 13:54
Satish Kumar Kanwar
Angelo,

The format for the racing is designed in a manner where the different classes are intended to sail together.
Created: Today 13:57
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Angelo Guarino
Forum Moderator
Nationality: United States
PS:  if you wanted to crown a sort of "over all" winner .. an option is as follows. 

  1. Score each fleet individually. 
  2. Record the time separation between 1st and 2nd in each fleet. 
  3. Also record the total time for each first place. 
  4. Calc the Time-on-time delta % by subtracting the 2nd place time from the 1st, and dividing that by the total time of each OD first place. 
  5. Sort the TOT delta % high to low and that is your over all 1, 2, 3
Created: Today 14:00
Satish Kumar Kanwar
Thanks Angelo. 

will we be able to further score the other boats in a similar manner so that all boats have a score in the combined result?
Created: Today 14:05
Mark Townsend
Nationality: United States
The RYA website has information about using Portsmouth Yardstick https://www.rya.org.uk/racing/portsmouth-yardstick/ and some NoR and SI recommendations and a list of ratings.

The Portsmouth Yardstick for the five classes you referenced are.
  • 420 - 1110
  • ILCA 4 - 1218
  • ILCA 6 - 1156
  • ILCA 7 - 1103
  • Optimist - 1629  

Created: Today 15:22
Satish Kumar Kanwar
Thanks Mark. That would be very helpful.
Created: Today 15:33
Richard Jones
You can run a handicap race or a pursuit race.

For handicap race  all start together and finish when the race is long enough. All boats start at zero time. Record finish time and the number of laps completed for each boat.
Useful to record each boats time or position for each lap to guage when to finish the race.

You then calculate their individual PY  amended average lap time and multiply it by the number of laps for the leader to get an amended race time .

For a Pursuit race calculate a starting time for each class. Have a countdown display so they start at the correct time.

After the race duration sound a loud hooter and record each boats finish position on the water.

During the race record their positions after each lap.


Created: Today 18:48
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