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A narco-submarine (also called a drug sub or narco-sub) is a type of custom ocean-going, self-propelled, semi-submersible or fully-
submersible A submersible is an underwater vehicle which needs to be transported and supported by a larger ship, watercraft or dock, platform. This distinguishes submersibles from submarines, which are self-supporting and capable of prolonged independent ope ...
vessel built by (or for) drug smugglers. Newer semi-submersibles are "nearly-fully" submersible in order to reduce likelihood of detection by visual,
radar Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ...
, sonar, or
infrared Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those ...
systems. Cargo capacity varies widely with vessel size, although several tons is typical. In 2015, the largest-known cargo of was seized on a semi-submersible craft. Some contemporary narco-subs are capable of crossing the
Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
. Meanwhile, recently captured vessels in the central Pacific during the mid 2020s indicate said vessels are increasingly durable enough for their operators to attempt voyages across the Pacific to Oceania.


History

During the
Prohibition in the United States The Prohibition era was the period from 1920 to 1933 when the United States prohibited the production, importation, transportation, and sale of alcoholic beverages. The alcohol industry was curtailed by a succession of state legislatures, an ...
, bootleggers used low-profile riverboats to evade authorities. In the 1980s, go-fast boats were the smuggling vessel of choice in many parts of the world. Go-fast boats became more vulnerable to radar detection as radar technology improved, leading to the development of semi-submersibles. In 1988, an uncrewed submarine was found off
Boca Raton, Florida Boca Raton ( ; ) is a city in Palm Beach County, Florida, United States. The population was 97,422 in the 2020 United States census, 2020 census and it ranked as the 23rd-largest city in Florida in 2022. Many people with a Boca Raton Address, ...
. It was designed to be towed by a boat and submerged by
remote control A remote control, also known colloquially as a remote or clicker, is an consumer electronics, electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics, a remote control can be used to operat ...
. The sub was empty, but officials and authorities believe it was used for smuggling after it was realized the hatch could be opened only from the outside.


2000s

In 2006 a "submarine" was seized southwest of
Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, as well as Maritime bo ...
. The U.S. Coast Guard dubbed it '' Bigfoot'' because they heard rumors of their existence, but had never seen any prior to this find. In 2006, the U.S. detected three vessels in total, and they estimated between twenty-five and forty semi-subs departed from South America in 2007. In 2006, a sub was discovered on the north coast of Spain, but its use is unknown. In March 2006, according to a press release, the
Calabria Calabria is a Regions of Italy, region in Southern Italy. It is a peninsula bordered by the region Basilicata to the north, the Ionian Sea to the east, the Strait of Messina to the southwest, which separates it from Sicily, and the Tyrrhenian S ...
n criminal organization
'Ndrangheta The 'Ndrangheta (, , ) is a mafia-type organized crime, criminal syndicate originating from the Calabria region of Italy. Gratteri & Nicaso, ''Fratelli di Sangue'', pp. 65–68 This body, also referred to as the Commission in reference to the ...
ordered a shipment of nine tons of cocaine to be transported by a narco-submarine from Colombia to
Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
, but according to a countering press release, the vessel was discovered by Colombian and Italian police during construction. During the first six months of 2008, the U.S. Coast Guard and U.S. Navy detected forty-two subs off the coasts of
Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually ...
, but few seizures resulted. According to various press-releases, the projected eighty-five narco-submarine voyages by the end of 2008 could potentially bring about 544 tons of
cocaine Cocaine is a tropane alkaloid and central nervous system stimulant, derived primarily from the leaves of two South American coca plants, ''Erythroxylum coca'' and ''Erythroxylum novogranatense, E. novogranatense'', which are cultivated a ...
to U.S. customers. In 2008, the Mexican Navy intercepted a submarine in
international waters The terms international waters or transboundary waters apply where any of the following types of bodies of water (or their drainage basins) transcend international boundaries: oceans, large marine ecosystems, enclosed or semi-enclosed region ...
about southwest of
Oaxaca Oaxaca, officially the Free and Sovereign State of Oaxaca, is one of the 32 states that compose the political divisions of Mexico, Federative Entities of the Mexico, United Mexican States. It is divided into municipalities of Oaxaca, 570 munici ...
. Mexican Navy Special Forces fast-roped from a helicopter on to its deck and arrested four smugglers. According to one press-release, the vessel carried 5.3 tons of cocaine; it was towed to Huatulco, Oaxaca, by a Mexican Navy patrol boat. Also in 2008, the U.S. Coast Guard captured a semi-submersible vessel in international waters about west of
Guatemala Guatemala, officially the Republic of Guatemala, is a country in Central America. It is bordered to the north and west by Mexico, to the northeast by Belize, to the east by Honduras, and to the southeast by El Salvador. It is hydrologically b ...
; it was carrying an even seven tons of cocaine. The steel/fiberglass vessel was detected by a U.S. Navy aircraft as part of Operation Panama Express, and was intercepted by Coast Guard Law Enforcement Detachment 402 aboard USS ''McInerney''. Five days later, an semi-submersible was seized in international waters by the USCGC ''Midgett'' about south of
Guatemala Guatemala, officially the Republic of Guatemala, is a country in Central America. It is bordered to the north and west by Mexico, to the northeast by Belize, to the east by Honduras, and to the southeast by El Salvador. It is hydrologically b ...
. Several other submarines were intercepted, but not seized because their crews scuttled them upon interception. In 2009, the U.S. detected "as many as sixty" submarine related events, and calculated they were moving as much as a ton of cocaine daily. In the same year, three submarines were seized on the shores of the
Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ...
coast, loaded with 1.5 tons of cocaine. The Colombian Navy had intercepted or discovered thirty-three submarines by 2009.


2010s

After the November 5, 2010 arrest of Harold Mauricio Poveda, a key Mexican–Colombian link, enhanced interrogation revealed that the FARC ( Revolutionary Armed Forces of Colombia) were behind the construction of submarines and were collaborating with the Sinaloa Cartel to fund their activities.Detienen al Conejo, proveedor de El Barbas
''El Universal''. November 5, 2010 (in Spanish)
In 2012, United States Coast Guard officials expressed concerns such vessels could potentially be used for
terrorism Terrorism, in its broadest sense, is the use of violence against non-combatants to achieve political or ideological aims. The term is used in this regard primarily to refer to intentional violence during peacetime or in the context of war aga ...
. In 2015, the largest recorded seizure was after a cargo of was seized on a semi-submersible by . In 2016, the U.S. Coast Guard seized a semi-submersible in international waters about 300 miles west of
Panama Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and ...
, carrying about 6 tons of cocaine with a street value of about $200 million to U.S. customers. In 2017, the U.S. Coast Guard detained a semi-submersible off the coast of
Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
carrying of cocaine, and on 13 November the US Coast Guard located and seized another one off the coast of Panama. In 2019, Spanish authorities apprehended a 20 m semi-submersible off Galicia, containing 3,000 kg of cocaine, in the first known incident of a narco-submarine crossing the Atlantic Ocean. A narco-submarine was captured by the Peruvian Navy on 8 December 2019 carrying over 2,000 kg of cocaine off of the coast of the Department of Piura.


2020s

According to a press-release, on November 5, 2020, a submarine was seized in
Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...
. A further interception was made in October 2021 by the Ecuadorian naval training ship '' Guayas'' in the Pacific Ocean. The drug trafficker Laureano Oubiña affirmed the existence of a marine cemetery of narco-submarines near the
Canary Islands The Canary Islands (; ) or Canaries are an archipelago in the Atlantic Ocean and the southernmost Autonomous communities of Spain, Autonomous Community of Spain. They are located in the northwest of Africa, with the closest point to the cont ...
(
Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
). A long semi-submersible made of vinyl carbon fiber, christened by its builders ''Poseidón'' was found sunk without cargo by the Guardia Civil in the Ria of Arousa in March 2023. The vessel had a central hold with a load capacity of five tons, a forward ballast tank and a
diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
at stern. In 2024, the Colombian Navy captured a semi-submersible carrying 5 tonnes of cocaine 1,200 miles southwest of Clipperton Island in the Eastern Pacific in a 62 country operation. Having been captured over 3,000 miles from the Colombian Coast, the incident has been cited as proof that drug cartels are now willing to use narco-submersibles for direct drug smuggling to Australia and New Zealand over the 4,000-mile route in place of hiding smaller amounts of narcotics in commercial shipping.


Vessel types


Manned smuggling vessels


Semi-submersible

Colombia's Pacific coastline possesses thick jungles and waterways, which can be used as clandestine
shipyard A shipyard, also called a dockyard or boatyard, is a place where ships are shipbuilding, built and repaired. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Compared to shipyards, which are sometimes m ...
s. A Colombian Navy
commander Commander (commonly abbreviated as Cmdr.) is a common naval officer rank as well as a job title in many army, armies. Commander is also used as a rank or title in other formal organizations, including several police forces. In several countri ...
stated that it is most striking to notice the logistical capacity required in order to transport all the required materials into the jungle, including heavy equipment such as propulsion gear and generators. Some vessels are built in pieces and then reassembled in other locations under the jungle canopy, in camps outfitted with sleeping quarters for workers. The narco-submarines can cost about $2 million USD and take upward of a year to build. Despite the costs, some of the craft are intended for one-time use, being abandoned at sea after a successful delivery, given that their cargoes carry a street value of up to $400 million. On other seized craft however, officials found
zinc Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic tabl ...
bars used as sacrificial anodes, reducing
corrosion Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engine ...
on metal parts exposed to seawater. As corrosion would not be a concern on a single trip, but would affect long-term durability, this is an indication that the vessel was intended to be used for multiple voyages. The design and manufacturing techniques employed in their construction have improved over time: the boats have become faster, more seaworthy, and of higher cargo capacity. An long narco-submarine can reach speeds of and carry up to 10 tons of cocaine. They are typically made of
fiberglass Fiberglass (American English) or fibreglass (English in the Commonwealth of Nations, Commonwealth English) is a common type of fibre-reinforced plastic, fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened i ...
, powered by a 225–260 kW
diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
and crewed by a complement of four. They have enough cargo space to carry two to ten tons of cocaine, carry large fuel tanks which give them a range of , and are equipped with
satellite navigation A satellite navigation or satnav system is a system that uses satellites to provide autonomous geopositioning. A satellite navigation system with global coverage is termed global navigation satellite system (GNSS). , four global systems are ope ...
systems and long-range HF- SSB radio communications capabilities. There is no
head A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple ani ...
(toilet), and accommodation is cramped. As much of its structure is fiberglass and it travels just under the surface, the vessel is nearly impossible to detect via sonar or
radar Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ...
, and very difficult to spot visually. The newer models pipe their exhaust along the bottom of the hull to cool it before being exhausted, making the boat even less susceptible to infrared detection. They are most easily spotted from the air, though even that is difficult as they are
camouflage Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the leopard's spotted coat, the b ...
d with blue paint and produce almost no wake. They have ballast tanks to alter the vessel's
buoyancy Buoyancy (), or upthrust, is the force exerted by a fluid opposing the weight of a partially or fully immersed object (which may be also be a parcel of fluid). In a column of fluid, pressure increases with depth as a result of the weight of t ...
so that they ride low in the water.


=Typical characteristics

= These are the typical characteristics for semi-submersibles as stated by the U.S. Joint Interagency Task Force South: *Hull material: wood, fiberglass, or steel *Length 12–24 m * Freeboard 0.5 m *Engines: single or twin diesel *Fuel capacity: 5.6 cubic metres *Range: 3200 kilometers *Speed: 11 km/h or more *Crew: 4 *Capacity 4–12 metric tons *Control: human or remote


True submarines

Narco-submarines were considered by officials to be an oddity until 2000, when Colombian Anti-Narcotics Police discovered what was reported to be a half-built 36 m-longEl 'narcosubmarino' Colombiano
''El Pais''. 11 September 2000.
true submarine in a warehouse outside
Bogotá Bogotá (, also , , ), officially Bogotá, Distrito Capital, abbreviated Bogotá, D.C., and formerly known as Santa Fe de Bogotá (; ) during the Spanish Imperial period and between 1991 and 2000, is the capital city, capital and largest city ...
. The double-hulled steel vessel could have traveled 3,700 kilometers, dived 100 m, and could have carried about 15 tonnes of cocaine. On July 3, 2010 the Ecuadorian authorities seized a fully functional, completely submersible diesel-electric submarine in the jungles bordering
Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...
and Colombia. It had a cylindrical
fiberglass Fiberglass (American English) or fibreglass (English in the Commonwealth of Nations, Commonwealth English) is a common type of fibre-reinforced plastic, fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened i ...
and kevlar hull long, a conning tower with
periscope A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with ...
, and
air conditioning Air conditioning, often abbreviated as A/C (US) or air con (UK), is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature, and in some cases, also controlling the humidity of internal air. Air c ...
. The vessel had the capacity for about 10 tonnes of cargo, a crew of five or six people, the ability to fully submerge down to , and the capacity for long-range underwater operation. Ecuadorean authorities seized the vessel before its maiden voyage. On February 14, 2011 another submarine was seized by the Colombian Navy. The 31 m-long fiberglass and Kevlar vessel was found hidden in a jungle area in Timbiquí, in south-western Colombia. It was capable of travelling below water and it could carry four people and up to 8 tonnes of cargo.


Unmanned underwater vehicles

In 2022, Spanish police seized three unmanned underwater vehicles used to smuggle drugs across the Strait of Gibraltar from Morocco, the first known interception of such devices. The drones, carrying up to 200 kg of narcotics each, were linked to French cartels. The operation led to eight arrests and exposed a gang using advanced drones and modified vehicles for trafficking across Europe (BBC, 2022).


Whale-shaped mini-submarines

In 2025, international drug cartels began using sophisticated whale-shaped mini submarines to smuggle cocaine into Australia via Cyprus. These vessels are transported on cargo ships, dropped in international waters, then retrieved by smaller boats to deliver drugs ashore, posing a significant challenge to law enforcement detection efforts.


Operations


Operators

* Clan del Golfo * National Liberation Army (ELN) * Oliver Sinisterra Front * Revolutionary Armed Forces of Colombia (FARC) * Sinaloa Cartel


Routes

The western Colombian shore is ideal for smuggling. Of the two tons of cocaine coming out of Colombia daily, about a third leave via the Pacific coast in semi-submersibles. Homeland Security estimate submarines carry one-third of smuggled maritime goods to United States customers, while claiming they "are clueless" about the rest. Elsewhere, the U.S. Coast Guard say smugglers are evolving complete logistics: fishing vessels along the way warn the crews against patrols and provide them with refreshments, while offshore refueling vessels provide unlimited loiter time so smugglers can avoid coastal areas. For smugglers, the trips are worth the investment—a nine-ton load earns nearly
US$ The United States dollar (Currency symbol, symbol: Dollar sign, $; ISO 4217, currency code: USD) is the official currency of the United States and International use of the U.S. dollar, several other countries. The Coinage Act of 1792 introdu ...
200 million wholesale from U.S. customers. Professional fishermen are often at the controls and earn about US$3,000 after completing the excursion. Submarine smugglers unload their cargo onto fast-boats for the final leg to shore. According to press-releases, none of the submarines are known to unload at North American ports or beaches. Drug mules of the Chipitos branch of the Sinaloa Cartel reportedly hate submarine duty.


Countermeasures


Surveillance

In 2007, the U.S. Coast Guard adjusted their underwater acoustic sensors to listen for submarines. According to a 2019 press-release, the U.S. Coast Guard reports they capture only 11% of submarines on the East Pacific route. The same source acknowledged that the U.S. Coast Guard was overstretched at the time.


Legal

If various militaries attempt to seize the semi-submersibles in international waters, the crews usually scuttle them. Until 2008, in accordance with international maritime law, the crew was rescued, and, if there was no evidence of wrongdoing, released. To address this loophole, the US Drug Trafficking Vessel Interdiction Act in September 2008 made it a "felony for those who knowingly or intentionally operate or embark in a self-propelled semi-submersible (SPSS) without nationality and that is or ever navigated in international waters, with the intent to evade detection". The penalty is a prison term of up to twenty years in the U.S. The U.S. law does not apply to flagged vessels (i.e., registered with some officially recognized government). The bill grants
extraterritorial jurisdiction Extraterritorial jurisdiction (ETJ) is the legal ability of a government to exercise authority beyond its normal boundaries. Any authority can claim ETJ over any external territory they wish. However, for the claim to be effective in the external ...
over international waters and makes it illegal to lack relevant documents. Instead of an anti-narcotics operation turning into a rescue mission after submarines are sunk, the crew can be detained and interrogated using exigent methods. In 2009,
Congress of Colombia The Congress of the Republic of Colombia () is the name given to Colombia's bicameral national legislature. The Congress of Colombia consists of the 108-seat Senate, and the 188-seat Chamber of Representatives, Members of both houses are e ...
passed a law punishing builders of semi-submersible vessels with up to 12 years in prison, or 14 years if they are used to transport drugs. Security issues related to "torpedo-style cargo containers", semi-submersible vessels, and submarines were reviewed in an August 2012 article in the U.S. publication Homeland Security Affairs.


See also

*
Anti-submarine warfare Anti-submarine warfare (ASW, or in the older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations ar ...
*
Illegal drug trade The illegal drug trade, drug trafficking, or narcotrafficking is a global black market dedicated to the cultivation, manufacture, distribution and sale of drug prohibition, prohibited drugs. Most jurisdictions prohibitionism, prohibit trade, exce ...
* Illegal drug trade in Colombia * Merchant submarine * Mérida Initiative *
Mexican Drug War The Mexican drug war is an List of ongoing armed conflicts, ongoing Asymmetric warfare, asymmetric armed conflict between the Federal government of Mexico, Mexican government and various Drug cartel#Mexico, drug trafficking syndicates. When the ...
* Narco tank * Plan Colombia * Prohibition of drugs


References


Further reading

*"''Ayer Médico, Hoy Narco – El Mexicano que Quizo ser Pablo Escobar''" (In Spanish) Author: Miguel Angel Montoya. Publisher: Oveja Negra. . Biography, includes one chapter on the narco-submarine and narco torpedo development.


External links


Drug Submarines' CultureDoes 'Smuggler's Corridor' Now Extend to South America?Authorities in Awe of Drug Runners' Jungle-Built, Kevlar-Coated SupersubsAnatomy of a narco-submarine, El Pais (In Spanish)
;Videos:
Colombian traffickers moving drugs in submarines

US Coast Guard intercepts drug running submarine

Rep Poe Worried About Drug Running Submarines
;Photo gallery:

by H. I. Sutton.
Drug cartels; secret weapon
{{DEFAULTSORT:Narco Submarine Merchant submarines Illegal drug trade techniques Illegal drug trade in the Americas