Would agree. It's definitely not double hulled, and from the drawings
I'd say it's not completely double bottomed.

Jeff Morris wrote:
Its funny, the drawing on the web site don't show this to be "double hulled".
The water ballast is on the center line, not around the chine - it would be easy
to penetrate the hull with a glancing blow to a rock.

BTW, what would happen to the daggerboard if it touched bottom?