ISSA Keelboat Invitational

# SchoolTeam A TOT
1 Lake Travis High School Lake Travis High School Cavaliers 21 21
2 St. George's School St. George's School Dragons 22 22
3 Christchurch School Christchurch School Seahorses 23 23
4 Shorecrest Preparatory School Shorecrest Preparatory School Chargers 24 24
5 Broadneck High School Broadneck High School Bruins 29 29
6 Corona del Mar High School Corona del Mar High School Sea Kings 32 32
7 Minnetonka High School Minnetonka High School Skippers 36 36
8 Lincoln Academy Lincoln Academy Eagles 42 42
9 Ballard High School Ballard High School Beavers 48 48
10 New Trier HS New Trier HS Trevian 54 54
SchoolTeam R1 R2 R3 R4 R5 R6 TOT
Lake Travis High School Lake Travis High School Cavaliers 1 3 3 4 3 7 21
St. George's School St. George's School Dragons 6 7 4 2 2 1 22
Christchurch School Christchurch School Seahorses 3 2 1 8 6 3 23
Shorecrest Preparatory School Shorecrest Preparatory School Chargers 2 1 6 5 1 9 24
Broadneck High School Broadneck High School Bruins 5 6 5 1 4 8 29
Corona del Mar High School Corona del Mar High School Sea Kings 4 8 2 3 5 10 32
Minnetonka High School Minnetonka High School Skippers 8 4 7 6 9 2 36
Lincoln Academy Lincoln Academy Eagles 7 5 9 9 7 5 42
Ballard High School Ballard High School Beavers 10 9 10 7 8 4 48
New Trier HS New Trier HS Trevian 9 10 8 10 RAF 6 54
School Team Sailors
Ballard High School Ballard High School Beavers SkipperCatie Vandervort '22
CrewColeman Barnes '23
CrewArden Rathopf '23
CrewMeimei Peterson '22
Broadneck High School Broadneck High School Bruins SkipperJonJon Weed '22
CrewWill Harding '22
CrewAnabel Chambers '24
CrewAden Keithley '24
Christchurch School Christchurch School Seahorses SkipperCarlos Bermudez de Castro Castro '22
CrewMarina Dryer '22
CrewAidan Iaconis '22
CrewMaison Koepke '23
Lake Travis High School Lake Travis High School Cavaliers SkipperJames Brock '24
CrewRyder Getson '25
CrewVivian Heitkoetter '23
CrewWilliam Cranney-Fee '23
Lincoln Academy Lincoln Academy Eagles SkipperToby Clarkson '24
CrewBobby Clarkson '23
CrewOtto Schoenthal '25
CrewKate Mason '23
Minnetonka High School Minnetonka High School Skippers SkipperJacob Zils '23 [1-6]
CrewTryg van Wyk '22 [1-6]
CrewMax Sigel '22 [1-6]
CrewMarley Barrett '23 [1-6]
Shorecrest Preparatory School Shorecrest Preparatory School Chargers SkipperGuthrie Braun '22
CrewKate Danielson '24
CrewEthan Danielson '22
CrewAndrew Tang '22
St. George's School St. George's School Dragons SkipperPearse Dowd '25
CrewCourtland Doyle '22
CrewTim Hibben '23
CrewDylan Balunas '24

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 · 6 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1James Brock '24Lake Travis High School6/61.872.85+0.9899th → 99th2.515%3.5 / 5.4
2Pearse Dowd '25St. George's School6/62.362.60+0.2499th → 99th0.230%3.7 / 4.5
3Carlos Bermudez de Castro Castro '22Christchurch School6/62.182.46+0.2899th → 99th0.230%3.8 / 4.9
4Guthrie Braun '22Shorecrest Preparatory School6/62.362.33−0.0299th → 99th0.043%4.0 / 4.5
5JonJon Weed '22Broadneck High School6/61.162.34+1.1883rd → 99th3.714%4.8 / 6.7
7Jacob Zils '23Minnetonka High School6/61.891.47−0.4299th → 92nd0.567%6.0 / 5.3
8Toby Clarkson '24Lincoln Academy6/61.441.48+0.0492nd → 92nd0.069%7.0 / 6.2
9Catie Vandervort '22Ballard High School6/60.990.81−0.1773rd → 65th0.176%8.0 / 6.9

Conditions — 12/11/2021 (8am–6pm)

☁️Overcast
Humidity 79%  ·  Pressure 1018.9 hPa

Temperature

75°F
↑ 79°F   ↓ 69°F
Feels like 78°F

Wind

● from   ▲ toward
7.6 kn
avg  ·  max 9.3 kn
Gusts to 17.9 kn
From S (182°)

Sky & Precipitation

Cloud cover64% Sunshine9.7 hrs Humidity79% Pressure1018.9 hPa

What this breeze does at Shorecrest Prep — from fleet racing

Breeze: S about 10 kn (weather reanalysis in the scorer’s units)
In fleet races at Shorecrest Prep in this breeze: an underdogs’ day (−0.07)
Underdogs’ conditions: in fleet racing here the fleet bunches up and lower-rated boats beat the seeds more often than 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 ±0.07 means a rating gap counts about 6% less 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 Shorecrest Prep by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 5 labelled days at Shorecrest Prep, 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 →