Namchief
Contributor
On a boat dive in St Thomas they used a sheath to cover the flags. But I too am putting a dive boat together from a pontoon. and plan on using pvc with the staionary part(bottom) having an inner diameter Just a lil bigger than the mounted (upper) outer diameter Holes drilled in both with either a tab lock pin or a wire lock pin (cotter key) so if I want it raised remove sheath remove the lock pin pull top part to the raised position then put the lock pin back in and let the upper part slide back down onto the lock pin or drill a hole in the upper pvc and reinsert the lock pin through both sections you could do this with 3 pieces of pvc for higher installations. Just a thought have not made it yet but will be working on it next week.