Today, the Tayrona semisubmersible sits on a strip of grass at the ARC Bolívar naval base in Cartagena. It’s exposed to the elements; rain has streaked its paint. To one side lies an older, bulkier narco sub seized a decade ago, a blue cylinder with a clumsy profile. The Tayrona’s hull looks lower, leaner, and more refined.
Up close, it is also unmistakably handmade. The hull is a dull gray-blue, the fiberglass rough in places, with scrapes and dents from the tow that brought it into port. It…

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