“The apparatus was manned by four Colombians who were captured. The suspects, on noting the presence of the authorities, opened the valves and sank the device,” the Colombian navy said. The vessel was spotted by the guided missile frigate USS Simpson during an anti-drug operation in the Pacific Ocean. Drug traffickers use the self-propelled semi-submersible vessels to transport up to 12 tons of cocaine. Read more here. Semana International delivers news about Colombia in English. Find more in our home.