Since the seminal events of September 11, 2001, it seems like every U.S. federal agency concerned with maritime commerce has enhanced its requirements relating to advance notices of arrival for ships, cargoes, and persons coming to the United States. One federal agency mariners had largely ignored also dipped its toes in these waters, only to withdraw, at least for the moment. This article will provide an overview of current federal requirements relating to advance notices of arrival. Like so much in the field of maritime security, these requirements change quickly and this article might be outdated by the time you read it - but here goes. Traditionally, the U.S. Coast Guard required ships coming to U.S.