| Event | Year | Start | End | Races | Teams |
|---|---|---|---|---|---|
| Flottenmeisterschaft Nordost | 1998 | 12 Sep | 13 Sep | 4 | 21 |
| Spéciale 505 | 1998 | 12 Sep | 13 Sep | 6 | 22 |
| Pre-Worlds & North American Championship | 1998 | 12 Sep | 17 Sep | 6 | 90 |
| Sommerschlußregatta | 1998 | 29 Aug | 30 Aug | ||
| Championnat du Léman | 1998 | 29 Aug | 30 Aug | 10 | 25 |
| Pacific Coast Championship | 1998 | 29 Aug | 30 Aug | 5 | 18 |
| Eastern Canadian Championship | 1998 | 28 Aug | 30 Aug | 9 | 19 |
| Belgium Open Championship | 1998 | 26 Aug | 27 Aug | 6 | 39 |
| Midwest Championship | 1998 | 22 Aug | 23 Aug | 7 | 20 |
| Möhne Cup | 1998 | 22 Aug | 23 Aug | 3 | 18 |
| Hospice Regatta | 1998 | 15 Aug | 16 Aug | 6 | 12 |
| No Name | 1998 | 15 Aug | 16 Aug | ||
| Pacific Northwest Regionals | 1998 | 15 Aug | 16 Aug | 7 | 6 |
| 1 Series | 1998 | 11 Aug | 12 Aug | 4 | 7 |
| UK National Championship | 1998 | 08 Aug | 14 Aug | 7 | 39 |
| 505er Regatta | 1998 | 08 Aug | 09 Aug | ||
| Fishing Bay Annual | 1998 | 08 Aug | 09 Aug | 6 | 7 |
| Zimbabwe Championship | 1998 | 01 Aug | 01 Aug | 12 | 9 |
| Gim Hobelman | 1998 | 01 Aug | 02 Aug | 8 | |
| Oberlandpütz Seeshaupt | 1998 | 01 Aug | 02 Aug | 3 | 23 |