Sub-surface oil surveillance near Mobile, Ala. 7

DAUPHIN ISLAND, Ala.--Coast Guard Petty Officer 1st Class Thomas Brown, a trumpet player with the Coast Guard Band in Groton, Conn., readies sub-surface oil surveillance gear on board a local fisherman's vessel of opportunity boat near Dauphin Island in the southwestern corner of Mobile Bay, Ala., Aug. 26, 2010. Sub-surface oil assessment is a critical step in the Deepwater Horizon oil spill response, allowing responders to thoroughly map, track and collect crucial underwater data.U.S. Coast Guard photo by Petty Officer 2nd Class Annie R. B. Elis.