Forums are a good place to gather a group of subject matter experts (and folks who may think they are so) together. Here is a picture of the new Texas Department of Public Safety, 36 ft. Patrol/Gunboat at the Homer Garrison Law Enforcement Academy, in Austin:
Designed and built to patrol Falcon Lake . . . The armaments onboard
include 5 – static mounted [2 dual & 1 single] FN M240B 7.62×51 mm NATO
Light machineguns, 2 – Barrett .50 BMG Sniper Rifles, and other assorted
5.56 rifles, 9mm sub machineguns, and grenade launchers.
That is a seriously up-armed little puddle piddler. No water-skking off the back of that!