PETALUMA, Calif. - Seaman Andrew Calvert learns to speak on a marine radio at the Coast Guard Training Center Petaluma's Operations Specialist "A" School Thursday, Feb. 10, 2011. Operations Specialists coordinate responses to Coast Guard missions, including search and rescue, law enforcement, environmental protection, and national security. U.S. Coast Guard photo by Petty Officer Pamela J. Manns.
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