| Event | Year | Start | End | Races | Teams |
|---|---|---|---|---|---|
| Pfingstbusch | 1998 | 30 May | 01 Jun | 6 | 31 |
| Pfingstwettfahrten | 1998 | 30 May | 01 Jun | 4 | 20 |
| Inland Championship | 1998 | 24 May | 26 May | 8 | |
| ABYC Memorial Day Regatta | 1998 | 23 May | 24 May | 7 | 12 |
| Eck-Days | 1998 | 23 May | 24 May | 4 | 36 |
| West River MidAtlantics | 1998 | 23 May | 24 May | 3 | 9 |
| Riva del Garda | 1998 | 21 May | 24 May | 7 | 36 |
| Hampton Trapeze | 1998 | 16 May | 17 May | 3 | 5 |
| Seattle One-design Centerboard and Keelboat Series | 1998 | 16 May | 17 May | 6 | 4 |
| European Championship | 1998 | 09 May | 16 May | 5 | 36 |
| Hoover Spring Regatta | 1998 | 09 May | 10 May | 10 | 11 |
| Richmond High Performance Invitational | 1998 | 09 May | 10 May | 5 | 14 |
| Auftakt Ammersee | 1998 | 02 May | 03 May | 3 | 19 |
| PreRace Euro | 1998 | 01 May | 03 May | 8 | 22 |
| Régional Est | 1998 | 25 Apr | 26 Apr | 4 | 19 |
| Santa Cruz Spring Open Regatta | 1998 | 25 Apr | 26 Apr | 5 | 15 |
| Trapezregatta | 1998 | 25 Apr | 26 Apr | 4 | 24 |
| West River Spring | 1998 | 25 Apr | 26 Apr | 6 | 10 |
| Open Meeting | 1998 | 18 Apr | 19 Apr | 5 | 18 |
| Cavalaire | 1998 | 10 Apr | 12 Apr | 6 | 92 |