MDISA Fall Keelboat Qualifier

# SchoolTeam A TOT
1 Annapolis High School Annapolis High School Panthers 6 6
2 St. Mary's High School (MD) St. Mary's High School (MD) Saints 11 11
3 Archbishop Spalding Archbishop Spalding Cavaliers 11 11
4 Severna Park Severna Park Falcons 12 12
5 Broadneck High School Broadneck High School Bruins 20 20
SchoolTeam R1 R2 R3 R4 TOT
Annapolis High School Annapolis High School Panthers 2 2 1 1 6
St. Mary's High School (MD) St. Mary's High School (MD) Saints 1 4 4 2 11
Archbishop Spalding Archbishop Spalding Cavaliers 4 1 2 4 11
Severna Park Severna Park Falcons 3 3 3 3 12
Broadneck High School Broadneck High School Bruins 5 5 5 5 20
School Team Sailors
Annapolis High School Annapolis High School Panthers SkipperPorter Kavle '18
CrewGeorge Kaye '18
CrewKimberly Leonard '18
CrewNicholas Salvesen '18
Archbishop Spalding Archbishop Spalding Cavaliers SkipperJake Vickers '18
CrewCaroline Kelly '19
CrewJack Irvin '17
CrewLeah Sweeney '19
Broadneck High School Broadneck High School Bruins SkipperSander Miller '18
CrewEmma Snead '19
CrewLucien Parker '20
CrewSean Jahnige '18
Severna Park Severna Park Falcons SkipperKate Riley '18
CrewBenjamin Podlich '18
CrewStanley Galloway '18
CrewIan Mathiesen '18
St. Mary's High School (MD) St. Mary's High School (MD) Saints SkipperJames Golden '20
CrewTrevor Davis '20
CrewMichael Bisson '18
CrewAllison Forsyth '18

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 · 4 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Porter Kavle '18Annapolis High School4/42.063.31+1.2599th → 99th1.616%1.5 / 2.4
2Jake Vickers '18Archbishop Spalding4/41.761.36−0.4099th → 92nd0.260%2.8 / 2.7
2James Golden '20St. Mary's High School (MD)4/41.751.36−0.4099th → 92nd0.261%2.8 / 2.7
4Kate Riley '18Severna Park4/41.141.80+0.6682nd → 99th0.745%3.0 / 3.2
5Sander Miller '18Broadneck High School4/40.14——12th → —2.4>99%5.0 / 4.0

Conditions — 10/02/2017 (8am–6pm)

☀️Clear sky
Humidity 59%  ·  Pressure 1029.6 hPa

Temperature

65°F
↑ 69°F   ↓ 53°F
Feels like 64°F

Wind

● from   ▲ toward
2.7 kn
avg  ·  max 4.6 kn
Gusts to 13.2 kn
From E (80°)

Sky & Precipitation

Cloud cover0% Sunshine10.9 hrs Humidity59% Pressure1029.6 hPa

What this breeze does at Annapolis/Severna Park/St. Marys (MD) — from fleet racing

Breeze: E about 6 kn (weather reanalysis in the scorer’s units)
In fleet races at Annapolis/Severna Park/St. Marys (MD) in this breeze: a typical day (+0.00)
Nothing in this breeze favours either side in fleet racing here: results follow the ratings about as 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 ±0.00 means a rating gap counts about 1% 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 Annapolis/Severna Park/St. Marys (MD) by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 2 labelled days at Annapolis/Severna Park/St. Marys (MD), 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 →