Boat of the water police patrolling on the Rhine river at Duisburg, North Rhine-Westphalia, Germany, Europe

at blur blurred blurring blurry boat boat boats bodies body check checking checks control controlling controls day daylight daytime duisburg during europe european exterior exteriors fast federal frg german germany harbor harbour inspect inspecting inspection inspections inspects interception monitor monitoring monitors motion north nrw observation of on one operation operations outdoor patrol patrolling photo photos police policemen polilceman quick quickly quickness republic rhine rhine westphalia rhine westphalian river rivers separate separately shot shots single singly speed speedily speedy supervision surveillance swift swiftly swiftness the velocity vessel vessels watch watches watching water waters waterway waterways westphalia westphalian