Great Photo
A water spout that size would definitely tare up your sails, bimini, dodger and pretty much clean your deck for you. Oh, and probably your antennas also.
Seriously, that is a nice one and a perfect form. This looks a little bigger than normal, but they do come much much larger.
A waterspout is pretty much the same as a tornado, just over water. The real difference is being hit with water at 140 MPH is not as bad as being hit with trees and bricks at 140MPH.
They knock down pleasure boats with not too much of a problem, but usually dont sink them.
Usually when one goes over a platform out here, all of the life jacket boxes get ripped open and life jackets become airborne. Usually no major damage.
Tony B