PCISA Keelboat Challenge

# SchoolTeam A TOT
1 Newport Harbor High School Newport Harbor High School Sailors 11 11
2 Corona del Mar High School Corona del Mar High School Sea Kings Varsity 18 18
3 Long Beach Wilson High School Long Beach Wilson High School Bruins 25 25
4 Cathedral Catholic High School Cathedral Catholic High School Dons 26 26
SchoolTeam R1 R2 R3 R4 R5 R6 R7 R8 TOT
Newport Harbor High School Newport Harbor High School Sailors 1 1 3 1 1 1 2 1 11
Corona del Mar High School Corona del Mar High School Sea Kings Varsity 3 2 2 3 2 3 1 2 18
Long Beach Wilson High School Long Beach Wilson High School Bruins 4 3 4 2 3 2 4 3 25
Cathedral Catholic High School Cathedral Catholic High School Dons 2 4 1 4 4 4 3 4 26

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.

Division A  4 boats · 8 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Sean Segerblom '16Newport Harbor High School8/82.583.69+1.1099th → 99th2.113%1.4 / 2.0
2Rhodes Garner '16Corona del Mar High School8/82.222.25+0.0399th → 99th0.053%2.2 / 2.3
3Trent Turigliatto '18Long Beach Wilson High School8/81.521.29−0.2392nd → 91st0.175%3.1 / 2.8
4Jesse McKnight '16Cathedral Catholic High School8/81.380.70−0.6892nd → 55th0.978%3.2 / 2.9

Conditions — 10/17/2015 (8am–6pm)

🌤️Mainly clear
Humidity 80%  ·  Pressure 1011.8 hPa

Temperature

73°F
↑ 75°F   ↓ 69°F
Feels like 76°F

Wind

● from   ▲ toward
6.9 kn
avg  ·  max 10.0 kn
Gusts to 18.3 kn
From WNW (287°)

Sky & Precipitation

Cloud cover52% Sunshine9.1 hrs Humidity80% Pressure1011.8 hPa Rain0.01 in

What this breeze does at San Diego Yacht Club — from fleet racing

Breeze: W about 9 kn (weather reanalysis in the scorer’s units)
In fleet races at San Diego Yacht Club in this breeze: a favourites’ day (+0.06)
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 ±0.06 means a rating gap counts about 5% 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 San Diego Yacht Club by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 3 labelled days at San Diego Yacht Club, 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 →