Coast Guard Invite — Analysis

← Results

Performance rating answers one question for each skipper: holding every other skipper's rating fixed, which rating makes my actual race-by-race finishes least surprising? It is the maximum-likelihood rating under the same Plackett–Luce model that produces the power rankings (how accurate it is), with each opponent fixed at their rating from the last rated week before this event (2026-W43). Substitute skippers are scored only on the races they sailed, and races the boat did not finish (OCS, DNF and similar) are left out.

Percentile places a rating among the 2,062 ICSA skippers who were rated within the year before this event, so it reads as “better than X% of the skippers racing in this league right now”. The arrow shows where the sailor stood going in and where this performance would put them.

Surprise is how many bits more surprising the sailor's finishes were at their pre-event rating than at their performance rating (0 = exactly as expected). P(this good or better) simulates the regatta 3,000 times with the sailor at their pre-event rating against the actual fleet, and reports how often they would score this many points or fewer in the races they skippered. Races in one regatta are not independent, so each simulation also gives every skipper a good or bad regatta, form that drifts from race to race, and the speed of each boat the rotation puts them in (why). Low means an unusually good regatta, high means an unusually poor one. It deliberately ignores how rivals actually sailed, so it agrees with the performance rating rather than with the division finish, which also depends on everyone else's day. Ratings are shown on the rankings scale (model rating × 100). Only skippers are rated; crews are not part of the model.

Combined divisions  18 boats · 7 races

Fin Skipper School Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
Rating
after
1 Eli Shainker '30 Yale University Bulldogs B 7/7 233 383 +150 79th → 96th 6.2 4% 3.9 / 9.6 234
2 Liam Marcell '30 U. S. Coast Guard Academy Bears 1 A 7/7 320 384 +64 90th → 96th 1.4 22% 4.6 / 6.8 320
3 Rory Murray '29 Connecticut College Camels 1 A 7/7 301 370 +69 88th → 95th 1.6 19% 4.7 / 7.4 301
4 Peter Judge '29 U. S. Coast Guard Academy Bears 2 A 7/7 295 363 +67 87th → 94th 1.6 21% 5.3 / 7.6 296
5 David Vinogradov '28 U. S. Coast Guard Academy Bears 2 B 7/7 272 274 +2 84th → 84th 0.0 38% 7.3 / 8.3 272
6 John Fichtenholtz '29 U. S. Coast Guard Academy Bears 1 B 7/7 299 294 -6 88th → 87th 0.0 57% 7.7 / 7.4 299
6 Thomas O'Grady '30 Yale University Bulldogs A 7/7 305 293 -13 89th → 87th 0.1 59% 7.7 / 7.3 305
8 Keegan Chatburn '29 Connecticut College Camels 1 B 7/7 277 273 -4 85th → 84th 0.0 53% 8.1 / 8.1 277
8 Pierson Falk '28 University of Rhode Island Rams A 7/7 247 273 +26 81st → 84th 0.3 37% 8.1 / 9.3 248
10 Colin Auvil '30 Roger Williams University Hawks B 7/7 220 263 +43 77th → 83rd 0.7 35% 9.0 / 10.2 220
11 Cole Amaral '28 Bowdoin College Polar Bears A 4/7 256 209 -47 82nd → 75th 0.6 71% 11.0 / 9.1 256
11 Henry Ladd '29 Bowdoin College Polar Bears A 3/7 269 212 -57 84th → 75th 0.6 76% 10.7 / 8.5 269
12 Paul Chapman '30 Roger Williams University Hawks A 7/7 247 206 -41 81st → 74th 0.8 73% 11.1 / 9.1 246
13 Noah Reischmann '29 Bowdoin College Polar Bears B 4/7 255 263 +8 82nd → 83rd 0.0 57% 9.5 / 9.1 255
13 Mairéad Reitzel '28 Bowdoin College Polar Bears B 3/7 232 162 -71 79th → 67th 1.1 91% 14.3 / 9.6 232
14 Leif Carlson '30 Connecticut College Camels 2 A 4/7 237 251 +14 79th → 81st 0.1 59% 10.2 / 9.5 237
14 Jeremiah Mccarthy '30 Connecticut College Camels 2 A 3/7 102 130 +28 56th → 61st 0.1 55% 14.3 / 13.5 102
15 Alexander Van Doren '30 Brown University Bears B 4/7 181 61 -120 70th → 47th 3.3 92% 16.0 / 11.3 179
15 Ethan Huang '30 Brown University Bears B 3/7 202 258 +56 74th → 82nd 0.5 29% 8.7 / 10.8 208
16 Ava Mcdermott '30 University of Rhode Island Rams B 7/7 22 101 +79 39th → 55th 1.6 37% 15.0 / 15.3 30
17 Quinn Brighton '27 Brown University Bears A 7/7 176 55 -121 69th → 46th 4.8 91% 15.4 / 11.3 174
18 Lily Stemhagen '29 Connecticut College Camels 2 B 7/7 134 102 -32 62nd → 56th 0.4 85% 15.7 / 12.7 131

From the notes

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

All notes →