Members of 1st Marine Special Operations Battalion practice boarding and searching ships. Marines train for Visit, Board, Search and Seizure (VBSS) at the highest level. This type of interdiction involves a non-compliant ship, underway, and opposed. - Members of 1st Marine Special Operations Battalion practice boarding and searching ships. Marines train for Visit, Board, Search and Seizure (VBSS) at the highest level. This type of interdiction involves a non-compliant ship, underway, and opposed.