submarine capable of smuggling up to 12 metric tons of cocaine

Colombian marines seized a makeshift submarine capable of smuggling up to 12 metric tons of cocaine through the Pacific to Central America, making it one of the largest such craft found, authorities said.
The nearly completed fiberglass submarine, found in a rural area in south Narino province, had space for four crew members, the Navy said in a statement.
Colombia's Pacific coast has become a key transport route for traffickers looking to access commercial sea lanes north to Mexico and the United States. Guerrillas, paramilitaries and traffickers often fight to control Pacific drug routes.
Rudimentary submarines and submersible containers dragged behind container ships are among the more inventive transport methods used by traffickers. Since 2005, Colombia's navy has captured 11 homemade submarines.