Nathaniel Hartwell

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Keelboat0.90unranked (fewer than 10 races or not active)12Spring 2025

Team Race Rating

Rating Rank vs fleet rating Record
1.61 (fleet 2.18) unranked (fewer than 30 matches as skipper, or not active) +0.04 ± 0.18
about what the fleet rating predicts
as skipper 12–6 (67%)
as crew 0–4 (0%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2026212–6—
Spring 20251—0–4

Team race surprisal: regatta by regatta

Over 3 graded regattas (22 matches) the record is 12–10 against 11.0 wins the pre-event forecasts expected (+1.0). 1 regatta clearly above the rating (P ≤ 20%), 1 clearly below (P ≥ 80%); 3 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2026-03-21Admiral Moore Team Raceskipper1.861.986–35.9+0.120.064%
2026-03-14WAC Team Race @ Fordhamskipper1.622.836–34.3+1.211.514%
2025-03-22Admiral Moore Team Racecrew1.27-1.730–40.9≤−3.001.5>99%

Regatta results

Regatta Role Div Races Avg Rating
Fall 2026 Team page Season
Nevins Trophy Skipper A 12 13.5 2.23
Luce Trophy Skipper B 6 2.0 3.55
KP Dinghy Open Invite Skipper B 4 15.0 —
Hewitt Trophy Skipper A 8 9.1 2.26
Spring 2026 Team page Season
WAC Team Race @ Fordham Skipper TR 13 77% —
Vietor Trophy Skipper B 4 8.2 2.14
The Grant Skipper A 14 5.9 2.10
America Trophy Skipper A 8 15.5 1.21
Admiral Moore Team Race Skipper TR 9 67% —
Admiral's Cup Skipper A 8 9.9 1.90
Fall 2025 Team page Season
War Memorial Skipper B 4 13.5 1.51
Northeast Qualifier #1 Skipper A 5 1.6 2.69
Luce Trophy Skipper A 5 8.4 1.31
Kennedy Cup Keelboat Crew A 4 6.2 —
Jack Boehringer '52 Open Invite Skipper A 11 13.2 0.19
Hewitt Trophy Skipper A 11 7.9 2.07
David Lee Arnoff Trophy Skipper A 11 5.9 1.22
Spring 2025 Team page Season
Vietor Trophy Skipper A 13 7.8 2.43
The Grant Skipper A 12 4.7 2.39
America Trophy Skipper A 12 14.8 1.51
Admiral’s Cup Skipper A 6 13.7 1.57
Admiral Moore Team Race Crew TR 14 43% —
2025 J70 Invite #2 Keelboat Skipper A 12 5.2 0.25
Fall 2024 Team page Season
War Memorial Skipper A 18 12.8 2.12
Open Atlantic Coast Tournament Skipper A 11 11.0 2.83
NY Maritime Fall Open Skipper A 14 5.2 2.08
Nevins Trophy Skipper A 8 14.8 1.90
KP Open Invite Skipper B 8 10.4 -1.40
Jack Boehringer '52 Open Invite Skipper C 8 12.5 —

From the notes

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

All notes →