2018 ISSA National Keelboat Invitational

# SchoolTeam A TOT
1 Corona del Mar High School Corona del Mar High School Sea Kings 25 25
2 Ranney School Ranney School Panthers 30 30
3 Newport Harbor High School Newport Harbor High School Sailors 41 41
4 St. Mary's High School (MD) St. Mary's High School (MD) Saints 42 42
5 Antilles School Antilles School Hurricanes 47 47
6 Minnetonka High School Minnetonka High School Skippers 62 62
7 Clear Falls High School Clear Falls High School Knights 68 68
8 Mt. Desert Island HS Mt. Desert Island HS Varsity 74 74
9 Gig Harbor High School Gig Harbor High School Tides 80 80
10 Portland High School Portland High School Bulldogs 81 81
SchoolTeam R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 TOT
Corona del Mar High School Corona del Mar High School Sea Kings 3 1 2 1 3 6 4 2 2 1 25
Ranney School Ranney School Panthers 6 8 1 3 2 2 1 1 1 5 30
Newport Harbor High School Newport Harbor High School Sailors 2 3 6 5 5 1 2 4 5 8 41
St. Mary's High School (MD) St. Mary's High School (MD) Saints 5 2 7 2 4 4 6 5 3 4 42
Antilles School Antilles School Hurricanes 1 6 5 4 1 7 3 7 10 3 47
Minnetonka High School Minnetonka High School Skippers 7 5 10 6 6 5 9 8 4 2 62
Clear Falls High School Clear Falls High School Knights 8 4 4 10 9 3 10 6 7 7 68
Mt. Desert Island HS Mt. Desert Island HS Varsity 9 10 3 8 10 9 7 3 9 6 74
Gig Harbor High School Gig Harbor High School Tides 4 7 9 9 8 10 8 10 6 9 80
Portland High School Portland High School Bulldogs 10 9 8 7 7 8 5 9 8 10 81

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.
1Max Mayol '19Corona del Mar High School10/102.443.37+0.9399th → 99th3.49%2.5 / 4.3
2Luke Arnone '19Ranney School10/102.542.83+0.2999th → 99th0.421%3.0 / 4.2
3Scott Mais '19Newport Harbor High School10/102.302.39+0.1099th → 99th0.039%4.1 / 4.6
4James Golden '20St. Mary's High School (MD)10/102.192.48+0.2999th → 99th0.438%4.2 / 4.8
5Christopher Sharpless '19Antilles School10/102.041.95−0.1099th → 99th0.042%4.7 / 5.1
6Matthew Kickhafer '19Minnetonka High School10/101.631.50−0.1395th → 92nd0.161%6.2 / 5.8
7Cade Morrell '21Clear Falls High School10/101.351.13−0.2292nd → 82nd0.265%6.8 / 6.2
8Alec Fisichella '19Mt. Desert Island HS10/101.030.94−0.0874th → 73rd0.064%7.4 / 6.8
9Axel Stordahl '20Gig Harbor High School10/101.380.78−0.6092nd → 63rd1.988%8.0 / 6.2
10Hal Clews '19Portland High School10/100.990.88−0.1173rd → 71st0.181%8.1 / 6.9

Conditions — 12/08/2018 (8am–6pm)

☁️Overcast
Humidity 66%  ·  Pressure 1022.0 hPa

Temperature

71°F
↑ 78°F   ↓ 61°F
Feels like 70°F

Wind

● from   ▲ toward
8.5 kn
avg  ·  max 11.4 kn
Gusts to 21.4 kn
From ESE (118°)

Sky & Precipitation

Cloud cover69% Sunshine9.5 hrs Humidity66% Pressure1022.0 hPa

What this breeze does at Lakewood/Osceola Fundamental/Shorecrest Prep/St. Petersburg — from fleet racing

Breeze: SE about 11 kn (weather reanalysis in the scorer’s units)
In fleet races at Lakewood/Osceola Fundamental/Shorecrest Prep/St. Petersburg 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 Lakewood/Osceola Fundamental/Shorecrest Prep/St. Petersburg by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (no labelled days at Lakewood/Osceola Fundamental/Shorecrest Prep/St. Petersburg: the all-venue pattern is shown).

From the notes

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

All notes →