There is decent post on CIMSEC looking at the possibility of terrorists using the vehicles developed by drug smugglers to carry out an attack. The author also does a pretty good job of explaining why smugglers might be unlikely to cooperate. There is also a worthwhile bibliography associated with the post that appears to have been an academic treatise.
The NATO Science and Technology Organization’s Centre for Maritime Research and Experimentation has developed a standard for underwater acoustic communications called JANUS, which is recognised as a NATO standard by all NATO Allies since 24 March 2017. This marks the first time that a digital underwater communication protocol has been acknowledged at international level and opens the way to develop many exciting underwater communication applications.
I think this might become important to us. It is not just a military system.
Thanks to EagleSpeak for bringing this to my attention.