Laser North

Boat Speed Analyzer
SlowExpected boat effectFast
−0.110+0.11
Places per race a team should expect to gain or lose in this boat against what its sailors' ratings predict, from a model of this fleet fitted on every regatta sailed here since Spring 2011 (22 regattas). Shown at the 40% that holds up on regattas the model never saw; hover a sail for its value and uncertainty. Grey = boat not in the fit. How this is estimated.

Division A

Team1A2A3A4A
Fordham UniversityFordham University Rams 11122
Fordham UniversityFordham University Rams 22211
Hobart and William Smith CollegesHobart and William Smith Colleges Herons4433
Hobart and William Smith CollegesHobart and William Smith Colleges Statesmen 13344
Hobart and William Smith CollegesHobart and William Smith Colleges Statesmen 25566
Hobart and William Smith CollegesHobart and William Smith Colleges Statesmen 36655
U. S. Merchant Marine AcademyU. S. Merchant Marine Academy Mariners 17788
U. S. Merchant Marine AcademyU. S. Merchant Marine Academy Mariners 28877
U. S. Merchant Marine AcademyU. S. Merchant Marine Academy Mariners 3991010
U. S. Merchant Marine AcademyU. S. Merchant Marine Academy Mariners 4101099
SUNY Maritime CollegeSUNY Maritime College Privateers 111111212
SUNY Maritime CollegeSUNY Maritime College Privateers 212121111
SUNY Maritime CollegeSUNY Maritime College Privateers 313131414
Queen's UniversityQueen's University Gaels 114141313
Queen's UniversityQueen's University Gaels 215151616
Syracuse UniversitySyracuse University Orange16161515
Webb InstituteWebb Institute Clippers17171818

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 singlehanded rating rather than the fleet rating: 0.79 × the skipper's fleet rating from the week before the event (unrated skippers start at 1.11); the skipper's own singlehanded offset. Strength differences are scaled by 0.80 before they become probabilities, the value that calibrates the model on seasons it had not seen. Non-finishes (OCS, DNF and similar) are left out of the fitting, as in the rating model.

Percentile places a rating among the 309 ICSA sailors with a singlehanded 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 singlehanded 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  17 boats · 4 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Olin Paine '16Fordham University Rams 14/42.878.75++5.8878th → 99th10.1<1%1.0 / 6.0
2Nick Valente '16SUNY Maritime College Privateers 24/42.233.15+0.9258th → 84th1.010%4.0 / 7.5
3Alex Jacob '16Fordham University Rams 24/42.472.74+0.2662nd → 73rd0.126%4.8 / 7.0
4Timothy Zacher '13Hobart and William Smith Colleges Statesmen 14/42.052.25+0.2153rd → 59th0.117%5.2 / 8.0
5Wheeler Morris '16Hobart and William Smith Colleges Herons4/41.722.47+0.7543rd → 62nd0.721%6.0 / 8.8
6Mike Carr '15SUNY Maritime College Privateers 14/41.871.97+0.1047th → 51st0.042%7.5 / 8.4
7Nathan Fast '14Webb Institute4/41.123.10+1.9825th → 84th3.125%8.0 / 10.3
8Austin Neuman '16U. S. Merchant Marine Academy Mariners 34/41.471.52+0.0537th → 38th0.048%9.0 / 9.3
9John Darby '14Hobart and William Smith Colleges Statesmen 24/42.220.69−1.5358th → 17th4.681%9.8 / 7.6
10Dylan Marohn '16U. S. Merchant Marine Academy Mariners 44/41.041.24+0.2024th → 29th0.148%10.2 / 10.4
11Nicholas Lachance '16Hobart and William Smith Colleges Statesmen 34/41.291.49+0.2130th → 38th0.065%11.0 / 9.9
12Samuel Watterson '16U. S. Merchant Marine Academy Mariners 24/41.00-0.29−1.2922nd → 4th1.758%11.2 / 10.5
12Scott Lubliner '13SUNY Maritime College Privateers 34/41.310.22−1.1030th → 10th1.767%11.2 / 9.9
14Andrew Bates '15U. S. Merchant Marine Academy Mariners 14/41.652.17+0.5241st → 57th0.288%12.8 / 9.0
15Harmen Rockler '13Syracuse University4/40.11-0.23−0.348th → 4th0.180%15.0 / 12.6

Conditions — 09/08/2012 (8am–6pm)

🌤️Partly cloudy
Humidity 84%  ·  Pressure 1005.8 hPa

Temperature

77°F
↑ 79°F   ↓ 74°F
Feels like 80°F

Wind

● from   ▲ toward
12.7 kn
avg  ·  max 15.4 kn
Gusts to 30.3 kn
From S (180°)

Sky & Precipitation

Cloud cover62% Sunshine10.9 hrs Humidity84% Pressure1005.8 hPa Rain0.06 in

What this breeze does at Kings Point — from fleet racing

Breeze: S about 14 kn (weather reanalysis in the scorer’s units)
In fleet races at Kings Point in this breeze: a favourites’ day (+0.04)
Favourites’ conditions: in fleet racing here the results follow the ratings more closely than usual, and the top seeds hold their places.

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% 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 Kings Point by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (80 labelled fleet-race days at Kings Point).

From the notes

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

All notes →