Corrected time lets boats of different classes compete fairly in the same race. Each boat's elapsed time is divided by its Portsmouth Number and scaled up, so a faster class (with a lower PN) does not gain an unfair advantage. The boat with the lowest corrected time wins.
The formula
Corrected Time = Elapsed Time × 1000 ÷ Portsmouth Number
All times are in seconds.
Worked example
A Laser (PN 1100) sails the course in 44 minutes 00 seconds (2,640 seconds elapsed).
Corrected time = 2640 × 1000 ÷ 1100 = 2,400 seconds = 40 minutes 00 seconds.
Tied corrected times
When two or more boats finish with the same corrected time they are tied for those places. Under standard racing rules, tied boats share the points for the places they occupy. For example, if two boats tie for 2nd and 3rd they each receive (2 + 3) ÷ 2 = 2.5 points.
Average-lap racing
When boats complete different numbers of laps, a separate formula scales each boat's elapsed time to the leader's lap count before applying the PN correction. See the average-lap racing page for the full formula and worked calculators.
To calculate corrected times for a full fleet of boats, use the corrected time calculator.