NYISA-NW Keelboat Qualifier

# SchoolTeam A TOT
1 Irondequoit High School Irondequoit High School Eagles 4 4
2 St. Joseph's Collegiate Institute St. Joseph's Collegiate Institute Marauders 8 8
3 Fairport High School Fairport High School Red Raiders 8 8
4 Brighton High School Brighton High School Bauins 11 11
SchoolTeam R1 R2 R3 TOT
Irondequoit High School Irondequoit High School Eagles 2 1 1 4
St. Joseph's Collegiate Institute St. Joseph's Collegiate Institute Marauders 1 DSQ 2 8
Fairport High School Fairport High School Red Raiders 3 2 3 8
Brighton High School Brighton High School Bauins 4 3 4 11
School Team Sailors
Brighton High School Brighton High School Bauins SkipperJoe Seiffert '21
CrewTeddy Bernold '22
CrewFinn Mahan '22
CrewGreg Wilt '22
Fairport High School Fairport High School Red Raiders SkipperAdam Strobridge '22
CrewBenjamin Hosford '21
CrewCameron Bernabei '21
CrewMegan Thurley '21
Irondequoit High School Irondequoit High School Eagles SkipperCooper Petzing '23
CrewJuliana Lanz '23
CrewNora VanDerMeid '23
CrewGenevieve Heiermann '23
St. Joseph's Collegiate Institute St. Joseph's Collegiate Institute Marauders SkipperMark Hofmeister '20
CrewColin Marcolini '22
CrewGarrett Grenauer '20
CrewBraeden Bommarahau '21

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 78 ISSA 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  4 boats · 3 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Cooper Petzing '23Irondequoit High School3/30.452.19+1.7535th → 99th2.014%1.3 / 2.4
2Adam Strobridge '22Fairport High School3/30.180.18−0.0014th → 13th0.065%2.7 / 2.6
2Mark Hofmeister '20St. Joseph's Collegiate Institute3/30.501.86+1.3637th → 99th1.071%2.7 / 2.4
4Joe Seiffert '21Brighton High School3/30.02——6th → —4.693%3.7 / 2.7

Conditions — 11/04/2018 (8am–6pm)

☁️Overcast
Humidity 66%  ·  Pressure 1032.6 hPa

Temperature

44°F
↑ 48°F   ↓ 33°F
Feels like 38°F

Wind

● from   ▲ toward
4.2 kn
avg  ·  max 6.2 kn
Gusts to 15.0 kn
From ESE (120°)

Sky & Precipitation

Cloud cover82% Sunshine9.7 hrs Humidity66% Pressure1032.6 hPa

What this breeze does at Irondequoit — from fleet racing

Breeze: SE about 7 kn (weather reanalysis in the scorer’s units)
In fleet races at Irondequoit in this breeze: a typical day (+0.01)
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 ±0.01 means a rating gap counts about 1% 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 Irondequoit by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 1 labelled days at Irondequoit, 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 →