Members of U.S. Coast Guard Sector Boston’s Prevention Team conduct a commercial vessel inspection aboard a 590-foot, roll-on/roll-off ship in Boston, Monday, July 30, 2018. Roll-on/roll-off ships- also commonly known as “ro-ros”- are vessels designed to carry wheeled cargo that is driven on and off the ship, such as cars, trucks, semi-trailer trucks. (U. S. Coast Guard photo by Petty Officer 2nd Class Lara Davis)