The concept of using submarines for drug smuggling emerged in the 1990s, with initial sightings reported in Colombia. Early versions were rudimentary, often referred to as "semi-submersibles ...

The Colombian navy has intercepted a semi-submersible vessel packed with cocaine in the Pacific Ocean, as part of an operation in which hundreds of arrests have been made. It said the vessel had ...

A security source told AFP the narco-submarines had initially been used to transfer drugs out of Colombia and on to ships off the coast. “It has been found that these semi-submersibles ...