14.203—Voyages upon which shipping articles are not required.
Although they may be used for the voyage; shipping articles are not required for any voyage by—
(c)
A vessel aboard which the merchant mariners are by custom or agreement entitled to participate in the profits or results of a cruise or voyage;
(e)
A ferry, or a tug used in ferrying, if the vessel is employed exclusively in trade on the Great Lakes, other lakes, bays, sounds, bayous, canals, or harbors.