In this 16 October 2012 post from the NSA internal newsletter SIDToday, an agency staffer from NSA’s Hawaii station describes an incident in which NSA assisted in stopping a vessel engaged in illegal drift-net fishing by tracking a satellite phone on board: see the Intercept article The NSA’s Role in a Climate-Changed World: spying on nonprofits, fishing boats, and the North Pole, 15 August 2018.