MDISA Keelboat Qualifier @ Annapolis Yacht Club

# SchoolTeam A TOT
1 Broadneck High School Broadneck High School Bruins 10 10
2 St. Mary's High School (MD) St. Mary's High School (MD) Saints 11 11
3 Key School Key School Zags 12 12
4 Archbishop Spalding Archbishop Spalding Cavaliers 17 17
5 Severna Park Severna Park Falcons 25 25
SchoolTeam R1 R2 R3 R4 R5 TOT
Broadneck High School Broadneck High School Bruins 1 4 2 1 2 10
St. Mary's High School (MD) St. Mary's High School (MD) Saints 2 1 3 2 3 11
Key School Key School Zags 3 3 1 4 1 12
Archbishop Spalding Archbishop Spalding Cavaliers 4 2 4 3 4 17
Severna Park Severna Park Falcons 5 5 5 5 5 25
School Team Sailors
Archbishop Spalding Archbishop Spalding Cavaliers SkipperAva Farley '22
CrewClaire Woynerowski '22
CrewMichael Hinrichs '22
CrewOwen MacWilliams '24
Broadneck High School Broadneck High School Bruins SkipperJonJon Weed '22
CrewAnabel Chambers '24
CrewAden Keithley '23
CrewWill Harding '22
Key School Key School Zags SkipperMason Cook '22
CrewAndrew Baker '24
CrewMolly Roden '22
CrewMarissa Loftus '22
Severna Park Severna Park Falcons SkipperPeter Judge '25
CrewGavin Morris '25
CrewMadison Cannon '25
CrewRyan Burgett '22
St. Mary's High School (MD) St. Mary's High School (MD) Saints SkipperChase Conway '22
CrewAndrew Tollefson '22
CrewJack Powers '24
CrewWilliam Donald '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.

  • — in the performance column: last in every race sailed, so no finite least-surprisal rating exists.

Division A  5 boats · 5 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1JonJon Weed '22Broadneck High School5/51.162.26+1.1083rd → 99th1.815%2.0 / 3.0
2Chase Conway '22St. Mary's High School (MD)5/51.652.09+0.4497th → 99th0.441%2.2 / 2.6
3Mason Cook '22Key School5/51.321.75+0.4392nd → 99th0.335%2.4 / 2.8
4Ava Farley '22Archbishop Spalding5/51.560.80−0.7694th → 64th1.386%3.4 / 2.6
5Peter Judge '25Severna Park5/5-0.08——1st → —3.0>99%5.0 / 4.0

Conditions — 11/11/2021 (8am–6pm)

☁️Overcast
Humidity 75%  ·  Pressure 1022.0 hPa

Temperature

60°F
↑ 65°F   ↓ 50°F
Feels like 57°F

Wind

● from   ▲ toward
6.5 kn
avg  ·  max 9.1 kn
Gusts to 18.7 kn
From SE (127°)

Sky & Precipitation

Cloud cover98% Sunshine9.6 hrs Humidity75% Pressure1022.0 hPa

What this breeze does at Annapolis Yacht Club — from fleet racing

Breeze: SE about 9 kn (weather reanalysis in the scorer’s units)
In fleet races at Annapolis Yacht Club in this breeze: an underdogs’ day (−0.04)
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 ±0.04 means a rating gap counts about 3% 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 Annapolis Yacht Club by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 1 labelled days at Annapolis 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 →