Maybe coast guard? They've been patrolling Big Island waters the last few weeks for maritime violations.
https://bigislandnow.com/2020/07/04/fede...iolations/
https://commons.wikimedia.org/wiki/File:...rcules.jpg
https://bigislandnow.com/2020/07/04/fede...iolations/
https://commons.wikimedia.org/wiki/File:...rcules.jpg