1800-Congress forbade citizens to own an interest in vessels engaged in the slave trade or to serve on such vessels. 1956-The President signed Public Law 519, which brought all previously uninspected vessels on navigable waters carrying more than six passengers for hire under inspection laws. These were chiefly party-fishing motorboats, excursion sailboats, and ferry barges. Public attention had been focused on the inadequacy of existing inspection laws by the hundreds of lives lost on uninspected vessels. 1966-CGC Point Grey was on patrol near South Vietnam's Ca Mau peninsula when she sighted a 110-foot trawler heading on various courses and speeds. Suspicions aroused, Point Grey commenced shadowing the trawler.