Session Details
Mark Spierings
Sunday 19 April 2026
GPS
COROS VERTIX 2S
Average speed
27.53 kts (28.72 27.57 27.51 26.97 26.87)
100m
28.86 kts
250m
28.22 kts
500m
27.8 kts
½ hour
11.92 kts
Hour
9.44 kts
Duration
02:32:19
Naut. Mile
23.73 kts
Alpha
17.35 kts
Distance
56.43 km
Wind
0 knots
Gust
0 knots
Direction
( ( 270)
Filter Rankings
Day Rank - speed
| # | Rider | Avg | |
|---|---|---|---|
| 1 | Rob Allersma | 29.84 | |
| 2 | Peter Vernet | 27.75 |  |
| 3 | Mark Spierings | 27.53 | |
| 4 | Marcel Mulder | 27.49 | |
| 5 | Eric Wind | 26.88 | |
| 6 | André Oost | 25.51 | |
| 7 | Mark Oosterhuis | 25.49 | |
| 8 | Mandy van de Hoef | 25.00 | |
| 9 | John Overmeer | 24.73 | |
| 10 | Dinand van Harselaar | 24.55 | |
Day Rank - speed
Avg
| Rider | Avg | 2 Sec | 500m | Mile | Hour | Distance | Alpha | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | |
Rob Allersma | 29.84 | 30.84 | 28.66 | 24.53 | 11.81 | 54.97 | 0.00 | |
| 2 | |
Peter Vernet | 27.75 | 29.23 | 27.13 | 23.67 | 17.11 | 108.10 | 18.32 | |
| 3 | |
Mark Spierings | 27.53 | 29.27 | 27.80 | 23.73 | 9.44 | 56.43 | 17.35 | |
| 4 | |
Marcel Mulder | 27.49 | 27.90 | 27.07 | 25.72 | 6.90 | 39.49 | 7.19 | |
| 5 | |
Eric Wind | 26.88 | 28.82 | 27.34 | 0.00 | 6.11 | 11.37 | 0.00 | |
| 6 | |
André Oost | 25.51 | 27.40 | 25.09 | 21.19 | 7.60 | 30.02 | 19.19 | |
| 7 | |
Mark Oosterhuis | 25.49 | 26.79 | 24.84 | 19.32 | 10.27 | 23.33 | 15.66 | |
| 8 | |
Mandy van de Hoef | 25.00 | 25.63 | 24.05 | 22.00 | 14.21 | 78.52 | 9.06 | |
| 9 | |
John Overmeer | 24.73 | 25.70 | 23.62 | 22.92 | 8.92 | 32.65 | 0.00 | |
| 10 | |
Dinand van Harselaar | 24.55 | 25.36 | 23.76 | 22.65 | 12.78 | 25.07 | 17.81 | |
Gear size range
Sail (m²)
6.7
avg 7.9
9.6
Board (W)
71
avg 110
143
Fin (cm)
32
avg 39
46
Wind Observation
| 🕐 | 7h | 8h | 9h | 10h | 11h | 12h | 13h | 14h | 15h | 16h | 17h | 18h | 19h | 20h |
| ↗ | ||||||||||||||
| kts | 5 | 9 | 8 | 10 | 11 | 8 | 11 | 15 | 12 | 15 | 14 | 14 | 15 | 12 |
| kts* | 9 | 15 | 11 | 15 | 19 | 11 | 18 | 27 | 17 | 25 | 28 | 19 | 25 | 24 |
| °C | 6° | 7° | 11° | 12° | 12° | 12° | 13° | 13° | 13° | 13° | 12° | 12° | 11° | 10° |
| Time | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Direction | ||||||||||||||
| Wind | 5 | 9 | 8 | 10 | 11 | 8 | 11 | 15 | 12 | 15 | 14 | 14 | 15 | 12 |
| Gust | 9 | 15 | 11 | 15 | 19 | 11 | 18 | 27 | 17 | 25 | 28 | 19 | 25 | 24 |
| Degrees | 293° | 315° | 315° | 315° | 338° | 338° | 338° | 338° | 338° | 338° | 338° | 0° | 0° | 338° |
Session Achievements
| Category | Speed Type | Speed |
|---|---|---|
BestYear |
24hour | 30.47knots |
BestYear |
alpha racing | 17.35knots |