It's hard to believe really, is this possible? A vmax of 13.5 kts in 6knots, and no not a formula, but a long skinny board???
Check it:
sure, see: en.wikipedia.org/wiki/Hull_speed
Design your displacement hull right wrt. the Froude number.
hards,matt and nebs your looking at what i think is the predecessor to the next outline for a speedboard that will easily break 50..it's always like a cycle they came out short and narrow, long and narrow, wide and stubby, less wide and longer and here it comes...
That was discussed on starboard a while back is a place in Greece and when the wind begins to blow apparantly doesn't hit water for a while, so it's supposed to be stronger than it looks????
That board wasn't planing, its a displacement board like the old Div 2s.
I imaging this board would be a shocker to gybe, tack or do anything except go fast in light winds, but thats the price you pay.
Div 2 boards do plane, although not as fast as other boards on a reach (they're not so slow square downwind).
The Serenity is interesting to sail but seems to turn much more slowly than a Div 2 and the fixed skeg, length and shape seem to make it much less versatile because it's harder to get it planing fast downwind.
Is it water or ice?
Maybe he's riding on a dugong?
Whatever...I'll have one of those!! 
It would be awesome to see a "video of that photo", how smooth a ride must that be!?!?!
