Drug trafficking using submarines

The Criminal and Terrorist Threat of Narco Submarine Technology

Drug trafficking, semi-submersibles: Drug cartels take to the seas in tiny submarines filled with cocaine.

Pictures: First True Cocaine Submarine

Colombian drug submarines – an annotated graphic – Engineering & Technology magazine

Narco-Submarines Guide: The Underwater World of Drug Trafficking

In too deep: the epic, doomed journey of Europe's first narco-submarine, Drugs

Narco-subs and the Colombian drug trade: the ultimate white whale

Narco-Submarines: Drug Cartels' Innovative Technology

Ghost submarine with $87.7 million of cocaine, two bodies aboard seized off coast of Colombia

Rare Electric Narco Submarine Seized in Colombia - USNI News