To amend title 46, United States Code, to require reporting of complaints of sexual offenses on documented vessels and to amend the Magnuson Fishery Conservation and Management Act to establish a criminal penalty for assaulting or interfering with observers and supplementary observers.

Amends provisions of Federal law relating to protection and relief of merchant seamen to require an individual in charge of a documented vessel to report to the Secretary of the department in which the Coast Guard is operating a complaint of a sexual offense prohibited under provisions of Federal criminal law relating to sexual abuse.

Amends the Magnuson Fishery Conservation and Management Act to make it unlawful to assault or interfere with an observer on a vessel under the Act. Adds such actions to provisions listing criminal offenses and their punishments.