NEISA Sportboat Invite #2

# SchoolTeam A TOT
1 U. S. Coast Guard Academy U. S. Coast Guard Academy Bears 1 25 25
2 Tufts University Tufts University Jumbos 2 28 28
3 Connecticut College Connecticut College Camels 28 28
4 Brown University Brown University Bears 31 31
5 University of Rhode Island University of Rhode Island Rams 38 38
6 U. S. Coast Guard Academy U. S. Coast Guard Academy Bears 2 43 43
7 Tufts University Tufts University Jumbos 1 43 43
8 U. S. Coast Guard Academy U. S. Coast Guard Academy Bears 3 52 52
SchoolTeam R1 R2 R3 R4 R5 R6 R7 R8 TOT
U. S. Coast Guard Academy U. S. Coast Guard Academy Bears 1 6 4 2 3 5 1 1 3 25
Tufts University Tufts University Jumbos 2 4 1 5 8 1 5 2 2 28
Connecticut College Connecticut College Camels 8 2 8 2 2 2 3 1 28
Brown University Brown University Bears 2 3 4 1 3 3 7 8 31
University of Rhode Island University of Rhode Island Rams 1 5 1 6 7 7 5 6 38
U. S. Coast Guard Academy U. S. Coast Guard Academy Bears 2 5 6 7 4 4 4 6 7 43
Tufts University Tufts University Jumbos 1 7 7 3 5 6 6 4 5 43
U. S. Coast Guard Academy U. S. Coast Guard Academy Bears 3 3 8 6 7 8 8 8 4 52

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 207 ICSA 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.

  • u no fleet rating — the model's level for unrated skippers is the baseline.

Division A  8 boats · 8 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1William Colomb '18U. S. Coast Guard Academy Bears 18/81.58u2.40+0.8291st → 99th2.313%3.1 / 4.4
2Logan Russell '19Tufts University Jumbos 28/81.501.99+0.4991st → 99th0.824%3.5 / 4.5
2Walter Florio '18Connecticut College8/81.301.80+0.4986th → 96th0.716%3.5 / 4.8
4Reid Secondo '16Brown University8/81.641.77+0.1393rd → 96th0.140%3.9 / 4.3
5Camden Tougas '17University of Rhode Island8/81.211.60+0.3982nd → 91st0.646%4.8 / 5.0
6Gary Nelthropp '19U. S. Coast Guard Academy Bears 28/81.58u1.41−0.1791st → 88th0.179%5.4 / 4.4
6Samuel Shea '19Tufts University Jumbos 18/81.641.37−0.2793rd → 87th0.381%5.4 / 4.3
8Andrew Goetz '18U. S. Coast Guard Academy Bears 38/81.58u0.24−1.3491st → 36th6.398%6.5 / 4.4

Conditions — 04/23/2016 (8am–6pm)

☁️Overcast
Humidity 69%  ·  Pressure 1009.1 hPa

Temperature

62°F
↑ 67°F   ↓ 56°F
Feels like 61°F

Wind

● from   ▲ toward
5.2 kn
avg  ·  max 7.8 kn
Gusts to 21.2 kn
From N (354°)

Sky & Precipitation

Cloud cover89% Sunshine7.1 hrs Humidity69% Pressure1009.1 hPa Rain0.06 in

What this breeze does at Coast Guard — from fleet racing

Breeze: N about 8 kn (weather reanalysis in the scorer’s units)
In fleet races at Coast Guard 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 Coast Guard by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (57 labelled fleet-race days at Coast Guard).

From the notes

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

All notes →