In this photo released by the U.S. Coast Guard, the scuttling valve of a self-propelled, semi-submersible craft seized Saturday, Sept. 13, 2008 is shown. The SPSS was interdicted by Coast Guard law enforcement detachment 404 about 350 miles west of Guatemala, with seven tons of cocaine aboard, with an estimated street value of more than $187 million. LEDET 404 was embarked aboard the USS McInerney in the Eastern Pacific Ocean. Scuttling valves are used by narco-traffickers to rapidly sink the SPSS upon detection by law enforcement, to send evidence of drug smuggling to the bottom of the ocean. (U.S. Navy Photo/Petty Officer 1st Class Nico Figueroa)