NWISA Keelboat Championship

# SchoolTeam A TOT
1 Sehome High School Sehome High School Mariners V 8 8
2 Lincoln High School - Portland, OR Lincoln High School - Portland, OR Cardinals 11 11
3 Squalicum High School Squalicum High School Storm 11 11
SchoolTeam R1 R2 R3 R4 R5 TOT
Sehome High School Sehome High School Mariners V 1 1 3 1 2 8
Lincoln High School - Portland, OR Lincoln High School - Portland, OR Cardinals 2 2 1 3 3 11
Squalicum High School Squalicum High School Storm 3 3 2 2 1 11
School Team Sailors
Lincoln High School - Portland, OR Lincoln High School - Portland, OR Cardinals SkipperMatthew Reynolds '16
CrewRebecca Reynolds '17
CrewSpencer Daigle '17
CrewIan Stewart '17
Sehome High School Sehome High School Mariners V SkipperLiam Hood '16
CrewShea Walker '16
CrewMallory Hood '18
CrewJeffrey Werner '16
Squalicum High School Squalicum High School Storm SkipperBenjamin Stark '16
CrewConnor McGreevy '16
CrewCasey Malone '20
CrewNicholas Bourlier '16

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  3 boats · 5 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Liam Hood '16Sehome High School5/51.461.92+0.4692nd → 99th0.339%1.6 / 1.9
2Benjamin Stark '16Squalicum High School5/50.841.07+0.2467th → 77th0.156%2.2 / 2.2
2Matthew Reynolds '16Lincoln High School - Portland, OR5/51.370.76−0.6092nd → 60th0.577%2.2 / 1.9

Conditions — 10/17/2015 (8am–6pm)

☁️Overcast
Humidity 83%  ·  Pressure 1011.2 hPa

Temperature

59°F
↑ 60°F   ↓ 55°F
Feels like 59°F

Wind

● from   ▲ toward
2.3 kn
avg  ·  max 2.9 kn
Gusts to 8.9 kn
From SW (215°)

Sky & Precipitation

Cloud cover92% Sunshine8.4 hrs Humidity83% Pressure1011.2 hPa Rain0.01 in

What this breeze does at Sehome — from fleet racing

Breeze: SW about 6 kn (weather reanalysis in the scorer’s units)
In fleet races at Sehome in this breeze: a strongly underdogs’ day (−0.12)
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 ±0.12 means a rating gap counts about 11% 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 Sehome by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (only 2 labelled days at Sehome, 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 →