Sailor · 2010–2026

Aidan Koster

rvicyc Melges 24 PHRF handicap J/70

Search sailors · About these ratings

Events: 15
Win rate: 13%
Podium rate: 53%
Typically beats: 62%
Best class ranking: #96
Longest win streak: 4

Most successful partnership: Mitchell Horn
Best trio: Mitchell Horn & Drew Ernst
Biggest lift: Fraser McMillan
Longest-running crew: Fraser McMillan
Nemesis: Kevin Welch
Best day: 24 Jun 2016
Signature result: 2nd of 28

Partnerships · 27 sailors

Most successful partnership: Mitchell Horn — 1 wins · 2 podiums in 3 events together

Fraser McMillan · Fraser McMillan, Sunnyvale, SUNNYVALE · Melges 24, PHRF handicap 5events 1 wins together · 3 podiums · 20% win rate · 8 of 29 races won Beat 94% of the fleet together(+27 vs. without) · best 1st · Jun 2016 – Sep 2021
Mitchell Horn · Great White · J/70, PHRF handicap 3events 1 wins together · 2 podiums · 3 events · 7 of 29 races won Beat 60% of the fleet together(−19 vs. without) · best 1st · Oct 2023 – Aug 2025
Drew Ernst · Great White · J/70, PHRF handicap 3events 1 wins together · 2 podiums · 3 events · 7 of 29 races won Beat 60% of the fleet together(−19 vs. without) · best 1st · Oct 2023 – Aug 2025
Sarah Turpie · White Noise · M242, Martin 242 2events 0 wins together · 2 podiums · 2 events · 4 of 19 races won Beat 74% of the fleet together · best 2nd · Oct 2025 – Jun 2026
Keegan Moynihan · Sunnyvale · Melges 24 2events 0 wins together · 1 podiums · 2 events · 0 of 12 races won Beat 94% of the fleet together · best 2nd · Jun 2016 – Aug 2019
Rich Mundell · White Noise · M242, Martin 242 2events 0 wins together · 2 podiums · 2 events · 4 of 19 races won Beat 74% of the fleet together · best 2nd · Oct 2025 – Jun 2026
Alexander Levkovskiy · Sunnyvale, SUNNYVALE · Melges 24 2events 1 wins together · 1 podiums · 2 events · 8 of 21 races won Beat 96% of the fleet together · best 1st · Aug 2019 – Sep 2021
Chris Vassallo · Goes To Eleven, SUNNYVALE · Melges 24 2events 1 wins together · 1 podiums · 2 events · 8 of 25 races won Beat 83% of the fleet together · best 1st · Oct 2016 – Sep 2021
Kieran Horsburgh · Sunnyvale · Melges 24 1events 0 wins together · 1 podiums · 1 events · 0 of 6 races won Beat 96% of the fleet together · best 2nd · Jun 2016 – Jun 2016
Gordon Shannon · Honey Badger · Melges 24 1events 0 wins together · 1 podiums · 1 events · 1 of 7 races won Beat 92% of the fleet together · best 2nd · May 2014 – May 2014

Lift shows how much better this sailor finishes with that partner aboard.

Rating history

— Helm rating, all classes · - - Crew rating, all classes

Event history · 15

Date	Event	Boat	Class	Role	Finish
19 Jun 2026	THRASH Keelboat Regatta	White Noise	M242	Crew	3rd / 6
4 Oct 2025	Thermopylae Regatta 2025	White Noise	Martin 242	Crew	2nd / 10
13 Aug 2025	Atlantic Yacht Sales Chester Race Week 2025	Great White	PHRF handicap	Other	2nd / 5
14 Aug 2024	2024 Helly Hansen Chester Race Week	Great White	J/70	Other	1st / 9
31 Oct 2023	2023 J/70 World Championship	Great White	J/70	Other	78th / 83
29 Sep 2021	Thermopylae Regatta 2021 &Melges 24 Canadian Championship	SUNNYVALE	Melges 24	Crew	1st / 6
1 Nov 2020	Virtue Cup 2020	Fraser McMillan	PHRF handicap	Crew	5th / 29
18 Oct 2020	Whitehouse Trophy 2020	SUNNYVALE	PHRF handicap	Crew	2nd / 24
16 Aug 2019	2019 Melges 24 North American Championship	Sunnyvale	Melges 24	Tactician	4th / 41
6 Oct 2016	2016 Melges 24 US National Championship presented by Line Honors	Goes To Eleven	Melges 24	Spinnaker trimmer	17th / 47
24 Jun 2016	2016 Melges 24 Canadian National Championship	Sunnyvale	Melges 24	Tactician	2nd / 28
16 May 2014	2014 Sperry Top-Sider Seattle NOOD Regatta	Honey Badger	Melges 24	Other	2nd / 13
6 Oct 2012	North/North	University of Victoria (Thunder 4)	College fleet racing	B Skipper	7th / 20
19 Jul 2012	2012 Laser North American Championship	191533	Laser	Skipper	28th / 51
26 Mar 2010	2010 Laser Midwinter West	1533	Laser Radial	Skipper	17th / 50

Ratings

Class	Rating	Rank	Adj. ±
All classes Crew	506 provisional	#1522 band 755–2937	—
Melges 24 Crew	367 provisional	#96 band 62–151	+10.2
All classes Helm	100 provisional	#32675 band 17164–54339	—

6 more classes, not yet ranked

J/70 · Crew · 21 races, 2 events · rating 112
Laser · Helm · 14 races, 1 event · rating 16
Martin 242 · Crew · 10 races, 1 event · rating 113
M242 · Crew · 9 races, 1 event · rating 40
College fleet racing · Helm · 8 races, 1 event · rating 73
Laser Radial · Helm · 7 races, 1 event · rating 20

Rank among sailors with ten or more rated races over three or more events, all time. In brackets, the ranks this rating cannot be told apart from. Adj. ± is the adjusted plus-minus in points of fleet beaten.

Helm and crew

As helm	3 events	0 wins	beats 61%
As crew	12 events	2 wins	beats 80%

Positions: Tactician (2) · Spinnaker trimmer (1) · B Skipper (1)

How they race

Closer	−3 pts	last race of an event vs. the rest
Comeback	−24 pts	the race after a bottom-half finish
Consistency	51%	100% = the same result every event
Big fleets (25+)	66%	of the fleet beaten
Small fleets (<12)	85%	of the fleet beaten

Head to head

Helm	Races	W–L
Kevin Welch	28	4–24
Duncan Stamper	28	22–6
Reid Cannon	23	8–14
Wes Whitmyer Jr	22	12–10
Nicolas Hamel	21	9–12
Richard Reid	21	7–14
David Cormack	21	11–10
Alex Fox	19	12–7
Robert Britten	19	9–10
Lucas Veinotte	19	18–1
Mike Cannon	19	5–14
Todd Marri	18	16–2

Most-beaten opponent: Lucas Veinotte (18–1).

Seasons

Year	Events	Wins	Beat
2026	1	0	60%
2025	2	0	82%
2024	1	1	100%
2023	1	0	6%
2021	1	1	100%
2020	2	0	91%
2019	1	0	93%
2016	2	0	81%
2014	1	0	92%
2012	2	0	57%
2010	1	0	67%

Boats

SUNNYVALE · Melges 24, PHRF handicap · 4 events · 2016–2021
Great White · PHRF handicap, J/70 · 3 events · 2023–2025
White Noise · M242, Martin 242 · 2 events · 2025–2026
Fraser McMillan · PHRF handicap · 1 events · 2020
Goes To Eleven · Melges 24 · 1 events · 2016
Honey Badger · Melges 24 · 1 events · 2014
University of Victoria (Thunder 4) · College fleet racing · 1 events · 2012
191533 · Laser · 1 events · 2012
1533 · Laser Radial · 1 events · 2010

Where they race

Royal Victoria Yacht Club · 4 events
Chester, Nova Scotia, Canada · 2 events
Washington · 1 events
Traverse City, MI, USA · 1 events
Cascade Locks, OR · 1 events
Victoria, BC · 1 events

Is this you?

Claim it to merge duplicates and remove results that aren’t yours. Changes apply at the nightly rebuild.

Crew rating across all classes: 506 (±163), #1,522.Helm rating across all classes: 100 (±241), #32,675. Compiled from public results; not an official ranking.