CIMSEC continues their series on “non-navies” with “Narco-Submarines: Drug Cartels’ Innovative Technology,” by Byron Ramirez. It provides an overview of the state of narco-sub development, employment, and countermeasures. It also announces the imminent publication of an unclassified study, “Narco-Submarines – Specially Fabricated Vessels Used For Drug Smuggling Purposes,” to be released by the Foreign Military Studies Office (FMSO).