Well, here’s the Pup’s dirty little secret. These ballast tanks should hold around 750lbs of water per tank. For those of you doing the math at home, that’s 1500lbs of ballast in the stern alone, below decks, invisible.

These are the fill and vent ports installed. This system will be an open system, venting air above decks and overfill draining above the waterline. Pumps will move water in and out through the seacock, retaining the invisibility and keeping the system very, very simple.

surf boat ballast

surf ballast tank

More to come here…