Great Lakes IOR - T10 Division

# SchoolTeam A TOT
1 Northwestern University Northwestern University Wildcats 11 11
2 Purdue University Purdue University Boilermakers 22 22
3 University of Saint Thomas University of Saint Thomas Tommies 25 25
4 Miami University Miami University Red Hawks 25 25
5 Michigan Technological University Michigan Technological University Husky One 27 27
6 Michigan State University Michigan State University Spartans 30 30
7 Indiana University Indiana University Hoosiers 30 30
8 University of Wisconsin University of Wisconsin Honey Badgers 47 47
SchoolTeam R1 R2 R3 R4 R5 R6 TOT
Northwestern University Northwestern University Wildcats 2 3 1 1 3 1 11
Purdue University Purdue University Boilermakers 1 4 2 5 7 3 22
University of Saint Thomas University of Saint Thomas Tommies 4 6 4 6 1 4 25
Miami University Miami University Red Hawks 6 1 3 4 2 DNF 25
Michigan Technological University Michigan Technological University Husky One 7 5 5 2 6 2 27
Michigan State University Michigan State University Spartans 3 7 7 3 5 5 30
Indiana University Indiana University Hoosiers 5 2 6 7 4 6 30
University of Wisconsin University of Wisconsin Honey Badgers 8 8 8 8 8 7 47

Performance rating asks, for each skipper: holding every other boat fixed, which rating makes my actual race-by-race finishes least surprising? Boats are valued with the keelboat rating rather than the fleet rating: 0.41 × the skipper's fleet rating from the week before the event (unrated skippers start at 0.47); 0.28 × the mean fleet rating of the rated crew aboard; the skipper's own keelboat offset; the school's program effect. Non-finishes (OCS, DNF and similar) are left out of the fitting, as in the rating model.

Percentile places a rating among the 207 ICSA sailors with a keelboat rating who raced the discipline in the last three seasons. Surprise is how many bits more surprising the finishes were at the pre-event rating than at the performance rating. P(this good or better) simulates the event 3,000 times at the pre-event ratings, with the same regatta-form model as the fleet analysis pages, and reports how often the skipper would score this many points or fewer in the races they sailed.

The keelboat offsets are the current ones (the discipline files keep no weekly history), so a skipper's own offset has already seen this event; offsets are shrunk hard, so the effect is a few hundredths at most. Only skippers are rated.

  • — in the performance column: last in every race sailed, so no finite least-surprisal rating exists.

Division A  8 boats · 6 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Cole Abbott '26Northwestern University6/61.052.70+1.6676th → 99th5.14%1.8 / 3.9
2Sam Childers '27Purdue University6/60.501.29+0.7949th → 86th1.624%3.7 / 4.7
3Greg Bittle '25University of Saint Thomas6/61.031.02−0.0175th → 75th0.061%4.2 / 3.9
3Reed Porter '25Miami University6/6-0.151.66+1.8110th → 93rd6.016%4.2 / 5.6
5Nick Myneni '26Michigan Technological University6/61.010.84−0.1775th → 67th0.170%4.5 / 3.9
6Keegan Beyer '28Michigan State University6/6-0.100.80+0.9012th → 64th2.234%5.0 / 5.6
6Nithya Balachander '25Indiana University6/60.800.66−0.1465th → 57th0.174%5.0 / 4.2
8Sydney Mandell '26University of Wisconsin6/60.90——71st → —22.5>99%7.8 / 4.1

Conditions — 09/21/2024 (8am–6pm)

☀️Clear sky
Humidity 49%  ·  Pressure 1012.4 hPa

Temperature

81°F
↑ 87°F   ↓ 69°F
Feels like 82°F

Wind

● from   ▲ toward
6.4 kn
avg  ·  max 8.7 kn
Gusts to 15.4 kn
From ESE (112°)

Sky & Precipitation

Cloud cover28% Sunshine11.0 hrs Humidity49% Pressure1012.4 hPa

What this breeze does at Chicago — from fleet racing

Breeze: E about 9 kn (weather reanalysis in the scorer’s units)
In fleet races at Chicago in this breeze: a favourites’ day (+0.04)
Favourites’ conditions: in fleet racing here the results follow the ratings more closely than usual, and the top seeds hold their places.

Orderliness is how tightly a fleet race’s finishing order follows the pre-regatta ratings, relative to a typical event (0): positive is the favourites’ day, negative the underdogs’. A value of ±0.04 means a rating gap counts about 3% more than on a typical day. This event is not a fleet race the rating model scores, so there is no actual value for it: this is what this venue’s fleet racing history says about the breeze on the day, read off the chart at the star. How this is estimated · compare venues.

Orderliness beyond the fleet at Chicago by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 1 labelled days at Chicago, so the surface is mostly the all-venue pattern).

From the notes

Short write-ups of what the ratings and results show, with the numbers and how they were computed.

All notes →