| Olle Martonen |
|
As a helmsman in 2025 in the Näsijärven Purjehdusseura/Näsijärvi Segelsällskap on 7922 |
| Olle Wenrup |
|
As a crew in 2025 in the SWE 505 Cup 2 on 8926 |
| Olli Karlsson |
|
As a crew in 1987 in the World Championship on 7802 |
| Ollie Boyes |
|
As a crew in 2011 in the Inlands on 8532 |
| Olly Hopkins |
|
As a helmsman in 2011 in the Winter Series on 8526 |
| Olof Bengtsson |
|
As a helmsman in 2019 in the Vårregatta on 8412 |
| Örjan Wesslén |
|
As a helmsman in 1997 in the Svenskt Mästerskap on 6143 |
| Oscar Angervall |
|
As a crew in 2015 in the Måndagsseglingar on 7937 |
| Oskar Lundberg |
|
As a crew in 2022 in the Nordiska och Svenska mästerskapen on 9143 |
| Oskari Jääskeläinen |
|
As a crew in 2002 in the Helsinki Regatta on 8405 |
| Othmar Zoller |
|
As a helmsman in 2015 in the Adonite Swiss Open on 8636 |
| Otto Toivanen |
|
As a helmsman in 2025 in the Näsijärven Purjehdusseura/Näsijärvi Segelsällskap on 8835 |
| Owen Mills |
|
As a crew in 2025 in the UK National Championship on 8881 |
| Owen Vale |
|
As a helmsman in 2025 in the Australian National Championships on 8796 |
| Ozzie Stewart |
|
As a helmsman in 1986 in the World Championship on 7915 |
| P Harinkcouck |
|
As a crew in 1959 in the Championnat de France on 0 |