The Marine Theft Bureau was established to combat intensifying theft problems involving vessels, motors, electronic devices, and other marine accessories. Marine Theft Bureau personnel work closely with the U.S. Coast Guard, federal enforcement agencies, state and local police, harbormasters and insurance agencies to prosecute criminals and recover stolen marine equipment. In addition, the Bureau's Questioned Documents Section cooperates with the Division's Registration and Titling Bureau on investigations involving disputed motorboat titles and registrations. Through cooperation with the Massachusetts Department of Revenue, the Marine Theft Bureau recovers substantial sales and excise tax revenue to the Commonwealth each year.