Keywords: Harness - 01.jpg en Center for Operational Oceanographic Products and Services staff installs an air gap sensor on the Don Holt Bridge in Charleston South Carolina The sensor is part of the Charleston Harbor Physical Oceanographic Real-Time System or PORTSĀ® Information from the sensor is critical for under bridge clearance as ships continue to maximize channel depths and widths while at the same time push the bounds of bridge heights 2013-04-28 08 46 16 http //oceanservice noaa gov/gallery/image php siteName nosimages cat Charleston 20Air 20Gap http //oceanservice noaa gov/ other versions PD-USGov Uploaded with UploadWizard Climbing harnesses Files by User Anna Frodesiak Taken with Samsung SCH-I535 |