Corrected time decides the finishing order for a handicap class (A3). These are the corrections
applied. E is elapsed time in seconds, C corrected time, D the course length in nautical miles.
For an introduction to choosing between systems, see
handicap systems explained.
Choose a class's system on the race office's Class scoring tab. Each system asks for the rating fields below on each boat, and for its race inputs on each race.
| System | Rating input | Correction | Race input |
|---|---|---|---|
| One design | None | C = E; or finishing order only |
None |
| PHRF time on distance | Seconds per mile R |
C = E − R × D |
Course length |
| PHRF time on time | Seconds per mile R |
C = E × A / (B + R) |
Constants A and B for the fleet |
| PHRF triple number | Low, medium and high (or distance) ratings | As above, with the band chosen | Band per race |
| PHRF pursuit | Seconds per mile R |
Start (R_slowest − R) × D after the slowest boat; finishing order is the result |
Course length |
| ORC GPH | General Purpose Handicap, seconds per mile | C = E − GPH × D |
Course length |
| ORC time on time | Inshore or offshore ToT | C = E × ToT |
Which number |
| ORC triple number | Low, medium and high ToT or ToD | ToT or ToD with the band chosen | Band per race |
| ORC performance curve | Certificate polar allowances | Implied wind from the course; ranked by implied wind | Course legs, or a course type |
| ORC Club | As ORC, from a Club certificate | As the ORC option chosen | As the ORC option chosen |
| ORR | Factors by course type and wind; GPH | C = E × factor, C = E − factor × D, or GPH time on distance |
Course type, wind band |
| ORR-EZ | 6 × 6 grid of course model and wind band, with non-spinnaker variants; GPH | C = E × factor, or GPH time on distance |
Course model, wind band |
| IRC | Time Correction Coefficient (TCC) | C = E × TCC |
None |
| CSA | Time-on-time factor | C = E × factor |
None |
| Portsmouth (US D-PN) | Number N |
C = E × 100 / N |
None |
| Portsmouth (RYA PN) | Number N |
C = E × 1000 / N |
None |
| Portsmouth, laps | Number N, on either scale |
Elapsed time averaged per lap, then corrected as above | Laps sailed |
| SCHRS | Time dividing factor | C = E / rating |
None |
| Texel | Texel rating TR |
C = E × 100 / TR |
None |
| MOCRA | Time-on-time factor | C = E × factor |
None |
| Organizer ToT or ToD | A factor, or seconds per mile | C = E × factor, or C = E − R × D |
Course length for ToD |
| Organizer expression | A number per boat | A formula the scorer writes from elapsed time, rating and distance | As the formula needs |
Rounding
Each system rounds as its own rule says: some round corrected times to the nearest second, others keep full precision. The class settings say which applies. Ties on corrected time share the points for the places involved (A7).
Mixed systems in one event
Each class has one system. A boat that holds certificates in several systems can be entered in a class for each. Ratings are stored per boat per system, so the same boat can be PHRF 96 in one class and IRC 1.012 in another.
Ratings and locking
The scorer enters each rating, or imports an ORC certificate, and reviews it: a rating stays proposed until it is accepted, and only accepted ratings are scored. Lock a class's ratings before racing; changes after the lock are recorded and need the scorer's role.
HPR and NHC are not offered.