It could be one of the strangest naval encounters in recent history. On Friday, an Ecuador Navy <a href="https://www.thenationalnews.com/lifestyle/travel/australia-holiday-aboard-sailing-ship-is-a-worthy-endeavour-1.384547" target="_blank">tall ship</a> – an 80-metre sailing ship based on 19th century design – tracked down and intercepted a “<a href="https://www.thenationalnews.com/world/police-discover-europe-s-first-narco-submarine-linked-to-cocaine-smuggling-1.1184748" target="_blank">narco submarine</a>” near the Colombian coast. Narco submarines have been the bane of <a href="https://www.thenationalnews.com/world/2021/10/20/aryan-khan-refused-bail-by-indian-court-after-cruise-ship-drug-bust/" target="_blank">counter-narcotics</a> operations on the high seas in recent years. But coast guard forces more usually deploy aircraft and <a href="https://www.thenationalnews.com/world/the-americas/watch-us-coast-guard-raid-submarine-carrying-tonnes-of-cocaine-1.885474" target="_blank">fast patrol boats</a> to intercept them, rather than tall ships fitted with more than 1,400 square metres of sail – as in the case of the Ecuadorean ship involved, the <i>BAE Guayas.</i> Narco submarines are thought to have been used by <a href="https://www.thenationalnews.com/world/europe/2021/09/14/italy-code-crackers-bust-international-cocaine-ring/" target="_blank">drug cartels</a> since the 1980s, but no interceptions were made by police until 2006 when the US Coast Guard seized one near Costa Rica. The semi-submersed speed boats are sometimes big enough to carry several tonnes of drugs, taking advantage of a low profile in the water in order to be hard to detect visually or by radar. On October 20, the Costa Rica Coast Guard intercepted a narco submarine with nearly two tonnes of cocaine on board. The <i>BAE Guayas, </i>which was built in 1977 as a training ship for cadets, pulled up alongside the vessel. Its crew held “three Ecuadorians and one Colombian in international waters, near Columbia’s Exclusive Economic Zone”, reported Ecuadorean publication <i>Expreso</i>, on Saturday. The Ecuadorean Navy confirmed the arrest of the four suspects in a tweet on Saturday. Authorities said the men had been taken to the mainland for questioning.