Norfolk Collegiate School '19
How much better or worse boats do with this sailor crewing than their skipper's rating predicts, shown on the skipper scale so crews can be lined up across teams. Percentiles compare against rostered crews that season (league) or teammates (team).
How crew ratings work →Crew effect over their whole career, not scaled to a team: 99.78 percentile among ISSA crews with 30+ races. Uncertainty ±0.081 rating points from 277 races with rated skippers.
How crew ratings work →No season rating yet: needs 8+ crewed races in a season.
A team race rating is what the sailor brings to one of the three boats: 0.72 x their fleet rating plus a team-race offset learned from every match they sailed, shrunk toward zero so a few matches cannot move it far. Sides are compared by the sum of their three boats plus the school's team race strength.
| Rating | Rank | vs fleet rating | Record |
|---|---|---|---|
| 0.12 | unranked (fewer than 30 matches as skipper, or not active) | +0.00 ± 0.18 about what the fleet rating predicts |
as skipper 2–0 (100%) as crew 90–67 (57%) |
| Season | Regattas | Skipper W–L | Crew W–L |
|---|---|---|---|
| Spring 2019 | 2 | — | 8–3 |
| Fall 2018 | 1 | — | 8–5 |
| Spring 2018 | 4 | 2–0 | 35–28 |
| Fall 2017 | 1 | — | 7–4 |
| Spring 2017 | 2 | — | 11–15 |
| Fall 2016 | 1 | — | 8–4 |
| Spring 2016 | 2 | — | 6–7 |
| Fall 2015 | 1 | — | 7–1 |
For each regatta, the boat value that would have made this sailor's record least surprising: the shift applied to their boat alone, in the matches they sailed, with team-mates and opponents fixed at the pre-event forecast. A boat's skipper and crew share the boat, so they get the same number when they sailed every match together. Surprise is in bits at the pre-event value minus at the performance value; P(this good or better) treats the matches as independent at the forecast probabilities. Regattas forecast from fewer than 1,000 training matches are left out.
Over 12 graded regattas (153 matches) the record is 87–66 against 95.8 wins the pre-event forecasts expected (−8.8). 1 regatta clearly above the rating (P ≤ 20%), 6 clearly below (P ≥ 80%); 14 bits of surprise in all.
| Date | Regatta | Role | Value | Perf. | Record | Exp. wins |
Δ | Surprise (bits) |
P(this good or better) |
|---|---|---|---|---|---|---|---|---|---|
| 2019-04-06 | VISA NCS Team Race Championship | crew | 2.12 | 3.29 | 6–3 | 4.9 | +1.17 | 0.7 | 29% |
| 2018-10-13 | VISA NCS Team Race Regatta | crew | 2.11 | 1.70 | 8–5 | 8.4 | −0.41 | 0.1 | 81% |
| 2018-05-26 | 2018 NIT Team Racing Regatta | crew | 2.38 | 0.73 | 13–11 | 19.1 | −1.66 | 6.0 | >99% |
| 2018-05-12 | VISA 2v2 Team Race Regatta | crew | 2.44 | 0.84 | 7–5 | 9.8 | −1.59 | 2.6 | 99% |
| 2018-04-28 | MASSA Team Championship Baker Qualifier | crew | 2.53 | 3.47 | 14–6 | 12.0 | +0.95 | 1.0 | 19% |
| 2018-04-19 | VISA Team Race Chmpionship | crew | 2.61 | 0.83 | 1–6 | 1.7 | −1.79 | 0.6 | 97% |
| 2017-10-14 | VISA Team Race Championship | crew | 2.66 | 2.00 | 7–4 | 7.8 | −0.66 | 0.3 | 86% |
| 2017-04-22 | MASSA Spring Team Race Championship | crew | 2.30 | 2.97 | 7–7 | 5.7 | +0.66 | 0.5 | 30% |
| 2017-04-01 | VISA NCS Team Race Regatta | crew | 2.40 | 0.80 | 4–8 | 5.8 | −1.60 | 1.6 | 97% |
| 2016-10-29 | MASSA Fall Team Race Championship | crew | 2.50 | 2.10 | 8–4 | 8.6 | −0.40 | 0.1 | 79% |
| 2016-04-23 | VISA Maury 3v3 Team Race Regatta | crew | 1.48 | 1.13 | 5–6 | 5.4 | −0.36 | 0.1 | 78% |
| 2015-10-24 | VISA NCS 2x2 Team Race Champions | crew | 1.38 | 1.92 | 7–1 | 6.6 | +0.54 | 0.1 | 58% |
Short write-ups of what the ratings and results show, with the numbers and how they were computed.
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