KANEOHE, Hawaii -- Ensign Seth Craven, a vertical insertion team leader from Honolulu-based Maritime Safety and Security Team 91107, secures a perimeter after rappelling from a Marine Corps CH-53 helicopter during vertical insertion training at Marine Corps Base Hawaii, Thursday, Jan. 7, 2009.
A vertical insertion is a maritime-based tactic used to board high interest vessels using the element of surprise.
U.S. Coast Guard photo by Petty Officer 3rd Class Luke Clayton
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