It suddenly slewed sideways off the track and rolled. Once slewed, the cargo vessel was swamped and then foundered. The Viscount slewed off the runway and onto the soft grass. In particular, tracks were easily slewed causing difficulties. The cannon is slewed by hydraulic-electrical system, with a manual backup. The line from Chesterfield was slewed into its present course to serve the new platforms. An oblique wing (also called a slewed wing) is a variable geometry wing concept. He slewed off left, cracking up the plane somewhat by making a wing-first landing. The Ground-Based Radar Prototype (GBR-P) is an X-band mechanically slewed phased array radar system.