Provide vehicle screening, inspection of passengers embarking on ferry vessels, waterborne patrol, surveillance, and traffic control to direct traffic onto the ferry vessels or staging areas for loading and unloading of vehicles and passengers for the TxDOT Galveston and Port Bolivar Ferry Operations. Subject to high noise levels including a variety of physical conditions, such as proximity to moving mechanical parts, moving vehicles, electrical current, exposure to high heat, extreme cold or exposure to chemicals.