An air gap (bridge clearance) sensor was installed on the Gerald Desmond Bridge, in Long Beach, California, to help ships know whether or not they can safely pass underneath the bridge.
With the NOAA 200th Celebration coming to a close at the end of 2007, maintenance of this Web site ceased. Updates to the site are no longer being made.
An air gap (bridge clearance) sensor was installed on the Gerald Desmond Bridge, in Long Beach, California, to help ships know whether or not they can safely pass underneath the bridge.