2024 ISSA Keelboat National Invitational

# SchoolTeam A TOT
1 Tabor Academy Tabor Academy Seawolves 20 20
2 Point Loma High School Point Loma High School Pointers 43 43
3 Wayzata High School Wayzata High School Navy 45 45
4 St. George's School St. George's School Dragons 48 48
5 Hampton Roads Academy Hampton Roads Academy Navigators 50 50
6 Lake Forest High School Lake Forest High School Scouts 55 55
7 Corona del Mar High School Corona del Mar High School Sea Kings 57 57
8 Clear Lake High School Clear Lake High School Falcons Green 65 65
9 Immaculata La Salle High School Immaculata La Salle High School Royal Lions 78 78
10 Bainbridge High School Bainbridge High School Spartans 89 89
SchoolTeam R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 TOT
Tabor Academy Tabor Academy Seawolves 1 3 1 1 2 2 6 1 2 1 20
Point Loma High School Point Loma High School Pointers 2 1 4 4 5 10 1 6 8 2 43
Wayzata High School Wayzata High School Navy 4 2 3 5 4 1 8 5 7 6 45
St. George's School St. George's School Dragons 5 4 6 2 1 3 4 9 6 8 48
Hampton Roads Academy Hampton Roads Academy Navigators 3 6 9 3 6 6 5 4 4 4 50
Lake Forest High School Lake Forest High School Scouts 6 7 2 8 9 9 2 8 1 3 55
Corona del Mar High School Corona del Mar High School Sea Kings 9 5 7 6 3 4 7 2 9 5 57
Clear Lake High School Clear Lake High School Falcons Green 8 8 10 9 7 7 3 3 3 7 65
Immaculata La Salle High School Immaculata La Salle High School Royal Lions 7 10 5 7 10 5 10 10 5 9 78
Bainbridge High School Bainbridge High School Spartans 10 9 8 10 8 8 9 7 10 10 89

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  10 boats · 10 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Peter Herlihy '25Tabor Academy10/102.753.98+1.2399th → 99th5.04%2.0 / 4.1
2Ian Nyenhuis '25Point Loma High School10/102.402.32−0.0899th → 99th0.042%4.3 / 4.7
3Dominik Moncur '25Wayzata High School10/101.782.55+0.7799th → 99th2.820%4.5 / 5.9
4Pearse Dowd '25St. George's School10/102.532.22−0.3199th → 99th0.565%4.8 / 4.4
5Parker Moore '25Hampton Roads Academy10/101.802.34+0.5499th → 99th1.430%5.0 / 5.9
6Owen Kohut '25Lake Forest High School10/102.171.88−0.2999th → 99th0.561%5.5 / 5.1
7Siena Nichols '27Corona del Mar High School10/102.121.92−0.2199th → 99th0.264%5.7 / 5.2
8Jack Cronan '25Clear Lake High School10/101.561.60+0.0494th → 94th0.057%6.5 / 6.2
9Beck Brill '27Immaculata La Salle High School10/101.510.81−0.7092nd → 65th2.184%7.8 / 6.3
10Joseph Tappen '25Bainbridge High School10/101.040.66−0.3774th → 51st0.692%8.9 / 7.1

Conditions — 12/14/2024 (8am–6pm)

🌤️Mainly clear
Humidity 69%  ·  Pressure 1026.3 hPa

Temperature

70°F
↑ 76°F   ↓ 59°F
Feels like 67°F

Wind

● from   ▲ toward
11.9 kn
avg  ·  max 14.7 kn
Gusts to 30.1 kn
From NE (55°)

Sky & Precipitation

Cloud cover39% Sunshine9.7 hrs Humidity69% Pressure1026.3 hPa

What this breeze does at St. Petersburg — from fleet racing

Breeze: NE about 13 kn (weather reanalysis in the scorer’s units)
In fleet races at St. Petersburg in this breeze: a strongly favourites’ day (+0.14)
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 ±0.14 means a rating gap counts about 12% 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 St. Petersburg by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 5 labelled days at St. Petersburg, 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 →