Session Details
Martin Koolma
Saturday 11 April 2026
GPS
Average speed
30.4 kts (31.06 30.77 30.12 30.11 29.93)
100m
31.49 kts
250m
30.42 kts
500m
28.59 kts
½ hour
15.5 kts
Hour
13.78 kts
Duration
02:20:43
Naut. Mile
26.21 kts
Alpha
12.86 kts
Distance
69.81 km
Wind
12 knots
Gust
12 knots
Direction
SE ( 135)
Pittige chop, met 7.5/117 begonnen tot dit echt niet meer te houden was, later over op de 6.5/97 , wind was helaas al over het hoogtepunt.
Lekker lange rakken gevaren met Johan en Peter..
Veel Dark Horses op het water vandaag.
Filter Rankings
Day Rank - speed
| # | Rider | Avg | |
|---|---|---|---|
| 1 | Marco Bos | 33.36 |  |
| 2 | Hans Prins | 32.17 | |
| 3 | Martin Koolma | 30.40 | |
| 4 | Tim Heeringa | 30.22 | |
| 5 | Johan Bulthuis | 30.03 | |
| 6 | Peter Kuiter | 29.86 | |
| 7 | Martijn Mobach | 29.27 | |
| 8 | Johan Gelling | 27.65 | |
| 9 | Marc Roosendaal | 26.75 | |
Day Rank - speed
Avg
| Rider | Avg | 2 Sec | 500m | Mile | Hour | Distance | Alpha | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | |
Marco Bos | 33.36 | 34.86 | 31.99 | 27.94 | 16.93 | 67.79 | 19.09 | |
| 2 | |
Hans Prins | 32.17 | 34.10 | 30.47 | 27.56 | 17.37 | 61.21 | 19.40 | |
| 3 | |
Martin Koolma | 30.40 | 32.12 | 28.59 | 26.21 | 13.78 | 69.81 | 12.86 | |
| 4 | |
Tim Heeringa | 30.22 | 33.60 | 30.69 | 0.00 | 6.22 | 23.00 | 15.93 | |
| 5 | |
Johan Bulthuis | 30.03 | 31.34 | 28.63 | 26.48 | 14.75 | 61.15 | 20.11 | |
| 6 | |
Peter Kuiter | 29.86 | 31.19 | 29.52 | 25.04 | 10.96 | 46.37 | 12.09 | |
| 7 | |
Martijn Mobach | 29.27 | 31.28 | 26.33 | 23.18 | 13.15 | 32.92 | 13.80 | |
| 8 | |
Johan Gelling | 27.65 | 30.39 | 27.14 | 23.93 | 15.18 | 45.96 | 14.89 | |
| 9 | |
Marc Roosendaal | 26.75 | 29.13 | 26.42 | 22.46 | 12.07 | 38.43 | 0.00 | |
Gear size range
Sail (m²)
6.5
avg 7.2
8.4
Board (W)
63
avg 95
117
Fin (cm)
32
avg 35
37
Wind Observation
| 🕐 | 7h | 8h | 9h | 10h | 11h | 12h | 13h | 14h | 15h | 16h | 17h | 18h | 19h | 20h |
| ↗ | ||||||||||||||
| kts | 6 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 13 | 15 | 12 | 11 | 13 | 8 |
| kts* | 6 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 13 | 15 | 12 | 11 | 23 | 8 |
| °C | 4° | 5° | 7° | 9° | 11° | 12° | 14° | 15° | 16° | 16° | 16° | 17° | 16° | 14° |
| Time | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Direction | ||||||||||||||
| Wind | 6 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 13 | 15 | 12 | 11 | 13 | 8 |
| Gust | 6 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 13 | 15 | 12 | 11 | 23 | 8 |
| Degrees | 90° | 113° | 90° | 113° | 113° | 113° | 135° | 113° | 135° | 135° | 135° | 135° | 158° | 158° |
Session Achievements
| Category | Speed Type | Speed |
|---|---|---|
BestYear |
24hour | 37.69knots |