In the bonkers short video below, you see a U.S. Coast Guard Deployable Specialized Forces TACLET guy deployed on the U.S. Coast Guard Legends-class National Security Cutter Munro (WMSL 755) going for a ride on a 31-foot Long Range Interceptor “somewhere in the Eastern Pacific.”
Said Coastie makes a perfect landing on what JIATF-South calls “a self-propelled semi-submersible suspected drug smuggling vessel (SPSS)” but best just known as a Narco-Sub. The below happened June 18, 2019.
This is the SPSS when surfaced, to give a scale at just how much of the hull was below the sea:

U.S. Coast Guard Cutter Munro (WMSL 755) crew members inspect a self-propelled semi-submersible June 19, 2019, in international waters of the Eastern Pacific Ocean. U.S. Coast Guard photo
Just two weeks after the above video was shot, crewmembers of the USCGC Mohawk (WMEC 913) and Tactical Law Enforcement Team South interdicted a second SPSS while conducting counter-trafficking operations in the Eastern Pacific.
The Coast Guard hasn’t been this busy fighting submarines since the Germans!