Christchurch School '18
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: 59.76 percentile among ISSA crews with 30+ races. Uncertainty ±0.100 rating points from 85 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 |
|---|---|---|---|
| 0.80 (fleet 1.30) | unranked (fewer than 30 matches as skipper, or not active) | +0.00 about what the fleet rating predicts |
as crew 44–6 (88%) |
| Season | Regattas | Skipper W–L | Crew W–L |
|---|---|---|---|
| Fall 2017 | 1 | — | 6–0 |
| Spring 2017 | 3 | — | 28–4 |
| Fall 2016 | 1 | — | 10–2 |
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 5 graded regattas (50 matches) the record is 44–6 against 41.4 wins the pre-event forecasts expected (+2.6). 2 regattas clearly above the rating (P ≤ 20%), 1 clearly below (P ≥ 80%); 8 bits of surprise in all.
| Date | Regatta | Role | Value | Perf. | Record | Exp. wins |
Δ | Surprise (bits) |
P(this good or better) |
|---|---|---|---|---|---|---|---|---|---|
| 2017-11-04 | MASSA 2017 Fall Team Race Championship | crew | 2.94 | 5.95 | 6–0 | 5.6 | ≥+3.00 | 0.5 | 66% |
| 2017-05-27 | ISSA Team Race Championship (Baker Trophy) | crew | 2.66 | 0.25 | 2–3 | 3.7 | −2.41 | 2.3 | 99% |
| 2017-04-22 | MASSA Spring Team Race Championship | crew | 2.50 | 4.25 | 14–1 | 12.1 | +1.75 | 1.6 | 16% |
| 2017-04-01 | VISA NCS Team Race Regatta | crew | 2.48 | 5.48 | 12–0 | 9.9 | ≥+3.00 | 3.2 | 8% |
| 2016-10-29 | MASSA Fall Team Race Championship | crew | 2.25 | 2.08 | 10–2 | 10.2 | −0.16 | 0.0 | 74% |
| Regatta | Role | Div | Races | Avg | Rating |
|---|---|---|---|---|---|
| Fall 2017 Team page Season | |||||
| MASSA 2017 Fall Team Race Championship | Crew | TR | 10 | 90% | — |
| 2017 MASSA Fall Fleet Gold Championships | Crew | B | 4 | 6.2 | — |
| Spring 2017 Team page Season | |||||
| VISA NSA Fleet Race Regatta | Crew | B | 6 | 1.7 | — |
| VISA NCS Team Race Regatta | Crew | TR | 11 | 91% | — |
| VISA HCS Fleet Race Regatta | Crew | A, B | 9 | 3.3 | — |
| VISA CCS Leukemia Cup Fleet Race Regatta | Crew | A | 5 | 1.8 | — |
| MASSA Spring Team Race Championship | Crew | TR | 15 | 93% | — |
| MASSA Mallory Qualifier | Crew | A | 8 | 4.9 | — |
| ISSA Team Race Championship (Baker Trophy) | Crew | TR | 5 | 40% | — |
| ISSA Fleet Racing Championship (Mallory Trophy) | Crew | B | 19 | 9.2 | — |
| Fall 2016 Team page Season | |||||
| VISA Maury Fleet Race Regatta | Crew | B | 5 | 1.2 | — |
| VISA Fall Fleet Race Championship | Crew | B | 4 | 1.2 | — |
| VISA NA Fleet Race Regatta | Crew | B | 5 | 1.2 | — |
| MASSA Fall Team Race Championship | Crew | TR | 12 | 83% | — |
| MASSA Fall Fleet Gold Championship | Crew | B | 10 | 2.2 | — |
| Atlantic Coast Championship | Crew | A, B | 12 | 5.0 | — |
| Fall 2014 Team page Season | |||||
| HCS/HRA Fleet Race Regatta JV | Skipper | A | 4 | 3.2 | 1.25 |
Short write-ups of what the ratings and results show, with the numbers and how they were computed.
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