Nonslip surfaces can be tape or preferably built into the fiberglass deck. The deeper more pronounced the the surface the better the gripping power with sharper angles being better than rounded bubbles. The fiberglass should not creak or flex. The gas tank should be removable. There must also be access to all fittings and clamps.
Many boats now have the stringers made of fiberglass which is better than wood sealed in fiberglass.
Also bronze is preferred to plastic. There should be a handle or railing for every passenger to hold on to. The longer the better. At least three steps. Rub Rail Should be straight and even.