Dartmouth College '24
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: 87.59 percentile among ICSA crews with 30+ races. Uncertainty ±0.076 rating points from 282 races with rated skippers.
How crew ratings work →| Season | Team | Rating | Range | League percentile |
Team percentile |
On team | Races | Team page |
|---|---|---|---|---|---|---|---|---|
| Spring 2024 | Dartmouth College | 4.69 | 96.34 | 87.50 | 2 of 12 | 41 | Team page | |
| Fall 2023 | Dartmouth College | 4.38 | 93.98 | 83.33 | 3 of 15 | 61 | Team page | |
| Spring 2023 | Dartmouth College | 3.72 | 87.79 | 61.11 | 4 of 9 | 26 | Team page |
Each discipline has its own scale, built from the sailor's main rating and their results in that discipline. The numbers are not comparable with the main rating or with each other.
How these ratings work →| Discipline | Rating | Rank | Races | Last raced |
|---|---|---|---|---|
| Singlehanded | 2.38 | unranked (fewer than 10 races or not active) | 12 | Fall 2018 |
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 |
|---|---|---|---|
| 2.44 (fleet 3.35) | unranked (fewer than 30 matches as skipper, or not active) | +0.01 ± 0.18 about what the fleet rating predicts |
as skipper 4–4 (50%) as crew 179–117 (60%) |
| Season | Regattas | Skipper W–L | Crew W–L |
|---|---|---|---|
| Spring 2024 | 7 | — | 63–44 |
| Spring 2023 | 6 | — | 54–33 |
| Spring 2022 | 7 | 4–4 | 59–38 |
| Spring 2021 | 1 | — | 3–2 |
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 22 graded regattas (304 matches) the record is 183–121 against 179.2 wins the pre-event forecasts expected (+3.8). 4 regattas clearly above the rating (P ≤ 20%), 6 clearly below (P ≥ 80%); 25 bits of surprise in all.
| Date | Regatta | Role | Value | Perf. | Record | Exp. wins |
Δ | Surprise (bits) |
P(this good or better) |
|---|---|---|---|---|---|---|---|---|---|
| 2024-04-28 | ICSA Women's Team Race National Championship | crew | 3.16 | 3.18 | 11–8 | 10.9 | +0.02 | 0.0 | 59% |
| 2024-04-25 | ICSA Open Team Racing National Championship | crew | 3.80 | 4.19 | 12–10 | 10.2 | +0.39 | 0.5 | 27% |
| 2024-04-13 | Thompson Trophy-CGA | crew | 3.78 | 4.32 | 12–7 | 10.1 | +0.54 | 0.8 | 22% |
| 2024-04-06 | NEISA Open Team Race Championship/Fowle | crew | 3.74 | 3.79 | 11–12 | 10.8 | +0.05 | 0.0 | 55% |
| 2024-03-30 | The 41st Cardinal Red Lynne Marchiando Trophy | crew | 3.07 | 4.93 | 7–2 | 4.0 | +1.86 | 4.0 | 2% |
| 2024-03-23 | Aaron Szambecki Team Race | crew | 3.63 | 3.39 | 6–2 | 6.3 | −0.24 | 0.1 | 78% |
| 2024-03-02 | Harvard Women's Team Race | crew | 2.79 | 2.32 | 4–3 | 4.5 | −0.47 | 0.2 | 84% |
| 2023-05-27 | College Sailing Team Race National Championship | crew | 3.58 | 3.87 | 14–9 | 12.7 | +0.29 | 0.3 | 35% |
| 2023-04-29 | Women's Team Race National Championship | crew | 2.84 | 0.39 | 1–9 | 5.1 | −2.45 | 6.2 | >99% |
| 2023-04-15 | NEISA Women's Team Racing Championship | crew | 2.67 | 3.40 | 12–5 | 9.6 | +0.73 | 1.2 | 15% |
| 2023-04-08 | NEISA Open Team Race Championship/Fowle | crew | 3.59 | 2.36 | 3–5 | 4.9 | −1.22 | 1.7 | 98% |
| 2023-04-01 | The 40th Cardinal Red Lynne Marchiando Team Races | crew | 3.65 | 3.00 | 9–3 | 10.1 | −0.65 | 0.5 | 90% |
| 2023-03-25 | Admiral Moore Open Team Race | crew | 2.91 | 4.33 | 15–2 | 11.5 | +1.42 | 3.2 | 4% |
| 2022-05-16 | College Sailing Team Race National Championship | crew | 3.49 | 2.49 | 7–8 | 10.1 | −1.00 | 2.3 | 98% |
| 2022-04-23 | Women's Team Race National Championship | crew | 2.48 | 2.37 | 7–7 | 7.3 | −0.12 | 0.0 | 69% |
| 2022-04-09 | 2022 NEISA Team Race Championship | crew | 3.60 | 3.55 | 9–6 | 9.1 | −0.05 | 0.0 | 65% |
| 2022-04-02 | NEISA Women's Team Race Champs/Dellenbaugh Trophy | skipper | 2.77 | 4.79 | 2–1 | 0.6 | +2.02 | 2.1 | 11% |
| 2022-04-02 | NEISA Women's Team Race Champs/Dellenbaugh Trophy | crew | 2.77 | 2.66 | 11–7 | 11.4 | −0.11 | 0.0 | 69% |
| 2022-03-26 | Joseph R. Duplin Trophy | skipper | 2.23 | 2.47 | 2–3 | 1.7 | +0.24 | 0.0 | 57% |
| 2022-03-05 | Sharpe Trophy Team Race | crew | 3.73 | 3.53 | 8–6 | 8.5 | −0.20 | 0.1 | 74% |
| 2022-02-26 | Phebe Corckran King Women's Team Race | crew | 3.65 | 4.22 | 17–4 | 15.6 | +0.57 | 0.6 | 29% |
| 2021-05-22 | Mystic Lake Team Racing Invite | crew | 3.77 | 2.10 | 3–2 | 4.2 | −1.67 | 1.5 | 98% |
| League | Name | School | Year |
|---|---|---|---|
| ISSA | Yumi Yoshiyasu |  Clear Lake High School |
'20 |
Short write-ups of what the ratings and results show, with the numbers and how they were computed.
