They are also called drug-subs or narco-subs.
It is a type of ocean-going semi-submersible or fully-submersible vessel for drug smuggling.
The new ones are almost fully-submersible to reduce detection.
Some are capable to cross the Atlantic Ocean.
Colombia’s Pacific coastline is thick jungle and waterways which can be used as shipyards. Some vessels are built in pieces and then assembled in the jungle.
The can cost up to 2 million USD and take 1 year to be built.
Some are one-time-use and they are abandoned after the delivery.
They can deliver from 2 to 10 tons of drugs and have a range of 3.000 to 3.500 kilometers. They are camouflaged with blue paint and they are equipped with satellite navigation and radio communication. They can be controlled by humans or remotely.
The Torpedo type is towed by a fishing boat to be released if a patrol ship is spotted. Then it is found by a location transmitter to continue the delivery.
[Source: en.wikipedia.org]
