In Missouri persons sitting on the hatch and/or standing on the deck would constitute a violation if the boat was in gear and not engaged in the process of mooring/casting off. The statutes may be less restrictive in Ct. A copy of the Mo reg follows:
Motorboats, regulations as to passenger seating while under way--person in water, flag required, when--slow speed required, when--penalty.
306.126. 1. The operator of a motorboat shall not allow any person to ride or sit on the gunwales, decking over the bow, railing, top of seat back or decking over the back of the motorboat while under way, unless such person is inboard of adequate guards or railing provided on the motorboat to prevent a passenger from being lost overboard. As used in this section, the term "adequate guards or railing" means guards or railings having a height parameter of at least six inches but not more than eighteen inches. Nothing in this section shall be construed to mean that passengers or other persons aboard a motorboat cannot occupy the decking over the bow of the boat to moor it to a mooring buoy or to cast off from such a buoy, or for any other necessary purpose. The provisions of this section shall not apply to vessels propelled by sail.