MAISA Match Race Championship

# SchoolTeam A TOT
1 Georgetown University Georgetown University Hoyas 1 1
2 St. Mary's College of Maryland St. Mary's College of Maryland Seahawks 2 2
3 U. S. Merchant Marine Academy U. S. Merchant Marine Academy Mariners 3 3
4 SUNY Maritime College SUNY Maritime College Privateers 4 4
5 Fordham University Fordham University Rams 5 5
6 George Washington University George Washington University Colonials 6 6
7 Hobart and William Smith Colleges Hobart and William Smith Colleges Statesmen 7 7
8 U. S. Naval Academy U. S. Naval Academy Midshipmen 8 8

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 · 1 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Nevin Snow '16Georgetown University1/13.117.00++3.8999th → 99th2.124%1.0 / 3.3
2Alexander Curtiss '16St. Mary's College of Maryland1/12.614.32+1.7199th → 99th0.927%2.0 / 4.2
3Charles Lomax '18U. S. Merchant Marine Academy1/12.223.56+1.3499th → 99th0.732%3.0 / 4.7
4Arthur Libby '17SUNY Maritime College1/11.563.11+1.5591st → 99th1.028%4.0 / 5.6
5Will Holz '17Fordham University1/12.022.69+0.6699th → 99th0.254%5.0 / 5.0
6Colin Kennedy '17George Washington University1/11.782.40+0.6296th → 99th0.261%6.0 / 5.4
7Greiner Hobbs '18Hobart and William Smith Colleges1/12.362.01−0.3599th → 99th0.189%7.0 / 4.5
8Michael Madigan '17U. S. Naval Academy1/13.29——99th → —7.0>99%8.0 / 3.3

Conditions — 10/24/2015 (8am–6pm)

☁️Overcast
Humidity 67%  ·  Pressure 1028.1 hPa

Temperature

51°F
↑ 53°F   ↓ 44°F
Feels like 46°F

Wind

● from   ▲ toward
6.0 kn
avg  ·  max 6.5 kn
Gusts to 13.0 kn
From ESE (115°)

Sky & Precipitation

Cloud cover99% Sunshine4.5 hrs Humidity67% Pressure1028.1 hPa

What this breeze does at Kings Point — from fleet racing

Breeze: SE about 9 kn (weather reanalysis in the scorer’s units)
In fleet races at Kings Point in this breeze: a typical day (+0.02)
Nothing in this breeze favours either side in fleet racing here: results follow the ratings about as usual.

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 ±0.02 means a rating gap counts about 2% 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 Kings Point by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (80 labelled fleet-race days at Kings Point).

From the notes

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

All notes →