Dugout filling with water...is the normal?

[LoudounSUP]

My 2020 NSP Ninja has 4 drain holes that "immediately expel excess water from the dugout"; however, I think its doing the opposite, and actually filling the dugout with water. Is this normal?

[TallDude]

I've heard ... that if you slow down or just float idle the footwell will fill up a little. You need to get moving at a decent clip to get the Venturi draw the water out.

[mrbig]

I had the dubious honor of owning a 2015 Starboard Race which had drain holes. It was also the most unstable board evah!

Sucker would fill on quiet water couple of inches, in the ocean blub blub.

A guy with serious skills bought it as it was FAST. Starby made it for one year...

[PonoBill]

I'll never understand why board designers don't simply use the drain systems that OC and surfski designers have used for decades, and that NACA--the predecessor to NASA--designed 50 or more years ago. But any passive below-the-waterline system that doesn't have a check flapper is going to fill while you're standing still. The flappers are unreliable, fill with debris, and restrict draining while you're moving, so except for boats (or boards) that are expected to move slowly, they aren't used.

The drain on my Scorpius OC1 will slowly let water enter the cockpit if I sit still, but a couple of strokes of the paddle to get the boat moving at perhaps one mph will suck the cockpit dry. That's about what you should expect, though I'd say that drain is going to be a lot less efficient than a bridged NACA duct.