Documentary creator fern opens their video with a blunt truth: cartels didn’t adopt submarines for romance or novelty – they did it because stealth at sea is profitable. Over the past decade, fern notes authorities have caught 200+ narco subs, but many more likely slipped through. The math is compelling: as Simon Whistler explains on Megaprojects, a single boatload can be worth $100 million at the destination, while a bespoke semi-submersible might cost $1–2 million to build. That kind of margin buys innovation, persistence, and a willingness to abandon the vessel the moment it’s done its job.
Jungle Shipyards And “Master Builders”
Fern’s reporting traces these boats to clandestine yards deep in the Colombian rainforest – far from roads, radars, and raids. There, small teams guided by highly skilled “master builders” fabricate hulls – often fiberglass – and rig propulsion, ballast, and minimal life support with limited tools and supply chains.
Naval analyst H.I. Sutton, interviewed by fern, calls the designs a masterclass in minimum viable product: good enough to push tons of cargo across oceans, rugged enough to fix underway, and cheap enough to scuttle with zero sentimentality. When one infamous builder, Oscar Moreno Ricardo, was arrested in 2022, the trade didn’t pause; as Whistler observes, replacements emerge quickly. Talent, tragically, is fungible when profits are this large.
Low-Profile Workhorses: The Semi-Sub That Won’t Quite Sink
The classic narco boat that fern profiles isn’t a true submarine; it’s a low-profile vessel (LPV) or self-propelled semi-submersible. Picture a 14–20-meter craft, hull riding inches above the surface, painted sea-gray, radar signature shaved to a nub. Fern describes three cramped compartments: cargo up front (think 7–8 tons of bricks), crew in the middle, diesel aft, plus just enough fuel and batteries to chug 15–20 km/h. If a maritime patrol aircraft spots one and vectors a cutter and helicopter, crews may hit the scuttling valve – more on that trick in a moment.
The Scuttling Playbook – And The Law That Killed It
In a separate video, YouTuber Tuxton Bein from the Not What You Think channel recounts a 2008 case: a semi-sub surrenders, crew hops overboard, and the vessel intentionally sinks, erasing evidence. For years that worked – “no trace, no case.” Then Congress closed the loophole with the Drug Trafficking Vessel Interdiction Act (2008), making it a felony simply to operate an unflagged semi-submersible, even without drugs aboard. Colombia followed in 2009 with a law criminalizing building them. Tuxton’s point is simple: law evolves like tactics. Once scuttling stopped being a legal escape hatch, interdictions could stick.
Why Authorities Still Sink Them Anyway
Here’s the twist Tuxton highlights: whether a go-fast, LPV, or semi-sub is caught, the U.S. Coast Guard scuttles the vessel after seizing evidence. Towing a jungle-built boat hundreds of miles is risky and resource-intensive, and leaving it afloat is a hazard to navigation. The Coast Guard typically keeps the engine cowling as a serial “souvenir” (and evidence), then sends the hull to the deep. It’s less cinematic than a pier-side perp walk with a captured sub – but far more practical.
Across The Atlantic In A Fiberglass Coffin
Fern’s most hair-raising vignette follows Agustín Álvarez, a former boxer captaining a 20-plus-meter semi-sub from the Brazilian Amazon to Galicia, Spain. No GPS (just a compass), 20,000 liters of fuel, sardines and energy bars for food, trash bags for toilets – then storms, near-collisions, and finally an empty tank after 27 days. After failed rendezvous with cartel boats, they scuttled near shore; Spanish authorities had already tracked the approach, refloated the hull, and recovered three tons of cocaine. Whistler adds this probably wasn’t the first transatlantic crossing – just the first confirmed because it broke down.
“Snorkel Subs” And The Art Of Almost Invisible
As fern details, the next evolutionary step is the snorkel sub – a sleeker, cylindrical hull capable of running awash, with only a mast-top air intake/camera above the surface. Still diesel-driven, often fiberglass, but equipped with ballast tanks and just enough electrical power to maneuver with finesse when patrol planes are near. Fern says none have yet been caught at sea – the ones authorities have seized were grabbed on land, implying a high success rate. That tracks with Whistler’s larger argument: the better the boat, the less likely we are to hear about it.
The Silent Leap: Battery Boats You Don’t Expect
The most startling find in fern’s film is a fully electric, fully submersible craft discovered in 2020: 12 meters, 10 tons of batteries, twin electric motors, dive planes, bunks, and an endurance of about 12 hours at 5 km/h – only ~60 km on its own. The telltale detail is a towing ring: hauled unseen for most of the voyage by a mothership, the sub detaches for the last, deniable miles. As Whistler notes, a similar electric build turned up in 2017. Nobody’s caught one “in the wild,” which suggests they either rarely fail or we’re simply not looking in the right places.
Detection Vs. Deception: How The Coast Guard Fights Back
Tuxton walks through the layered defense: wide-area search by P-3 Orions and HC-130J Super Hercules; intelligence from DoD, DHS, NSA, CIA, FBI; then fast-action interdiction by cutters, MH-65E “Dolphin” helicopters under HITRON, and Long-Range Interceptor boats. Helicopter crews start with sirens and M240 warning shots; if runners flee, they use precision rifle fire to disable engines. When smugglers try “engine shielding” – standing between the rifle and the outboards – the LRI closes to shotgun range where shielding doesn’t work. Frankly, it’s cat-and-mouse with a very big ocean for a maze.
The Numbers Game – And Why Estimates Clash
How effective are interdictions? Tuxton notes the Coast Guard seized 106 metric tons of cocaine in 2024, and roughly the same in the first half of 2025, while estimating that by 2025, ~80% of U.S.-bound narcotics are seized at sea (i.e., the share of seizures happens offshore). Whistler counters with an older U.S. estimate: authorities capture barely 10% of submarine traffic specifically. These aren’t contradictions so much as different denominators. One figure is about where seizures occur. The other is about how many narco subs evade detection. My take: the cartels are moving so much product by sea that both can be true – and both are sobering.
Why Water Wins: Capacity, Cover, And Cost
Tuxton’s two reasons the cartels love boats are hard to beat. First, capacity: maritime platforms haul tons, not suitcases. Second, cover: the maritime transit zone spans six million square miles – nearly twice the lower 48. Whistler adds the economic kicker: even if a sub costs seven figures and gets used once, it still makes sense when a single trip can pay for dozens more hulls. That’s why fern sees a trend toward smaller payloads but more boats – risk diversified across many voyages. From a supply-chain lens, it’s just portfolio management in a wetsuit.
The Next Iteration: Remote Control And Starlink
Tuxton flags a 2025 Colombian Navy find: a narco sub sporting a Starlink antenna, indicating experimentation with remotely controlled, unmanned runs. Remove the crew and you remove the weakest link – panic, fatigue, confessions. It also neuters some legal leverage and reduces the human cost to the cartels if the boat is seized or rammed. Combine that with fern’s electric “towed last mile” concept and Whistler’s observation of freelance shipyards for hire, and you see where this is heading: cheaper, quieter, semi-autonomous logistics with zero loyalty to the platform.
The Human Reality Behind The Tech
It’s easy to be dazzled by the ingenuity – and it is ingenious – but all three sources remind us why this matters. Tuxton ties maritime interdictions to downstream harms: weapons trafficking, terror finance, political corruption, and the grisly domestic toll of overdose deaths (with fentanyl now leading). Fern’s vignettes show crews living in suffocating conditions, and Whistler calls some early hulls “coffins” for a reason. My opinion: narco subs are a grim paradox – engineering brilliance in service of human misery. Admire the craft if you must; don’t romanticize the mission.
What It All Means – And What Comes Next
Put together, the reporting from fern, Tuxton Bein, and Simon Whistler sketches a feedback loop: cartels iterate from LPVs to snorkel subs to electric “last-mile” minis and now remote piloting; authorities answer with better sensors, case law, and interdiction tactics; the jungle yards professionalize; the ocean stays big.
No one is “winning” outright. But the fight at sea increasingly decides what does – and doesn’t – reach American and European streets. If the past decade is a guide, tomorrow’s narco sub will be smaller, smarter, cheaper, and less human. That’s a hard target for any coast guard. And it’s why this quiet, technical arms race under the waves matters far beyond the shoreline.
Growing up in the Pacific Northwest, John developed a love for the great outdoors early on. With years of experience as a wilderness guide, he’s navigated rugged terrains and unpredictable weather patterns. John is also an avid hunter and fisherman who believes in sustainable living. His focus on practical survival skills, from building shelters to purifying water, reflects his passion for preparedness. When he’s not out in the wild, you can find him sharing his knowledge through writing, hoping to inspire others to embrace self-reliance.
