U.S. Coast Guard pilots from the Aviation Training Center Mobile, Ala., participate in an official change of the watch ceremony where the HC-144A Ocean Sentry relieved the HU-25 Guardian, Friday Sept. 25, 2009.The Ocean Sentry has enhanced communications and search and rescue capabilities and greater endurance. Greater endurance will allow the aircrew to remain on station longer, collect more information, support other assets and track targets for longer periods of time.ATC Mobile is the first air station in the Coast Guard to fly the Ocean Sentry operationally. (U.S. Coast Guard photo/Petty Officer 3rd Class Elizabeth H. Bordelon)