Like to see the standard .50 cal upgraded with a short-range missile system or sub-surface munitions. The fifty will punch holes in a whole lot of stuff, but is no good against a larger target (or one that is submerged).
Actually,that's a mini-version of a family of stabilised weapon systems which consists of guns upto a calibre of 30 mm & can also include Spike-ER SSMs or Stinger Sams.
http://www.israeli-weapons.com/weapons/naval/typhoon/Typhoon.html
"Like to see the standard .50 cal upgraded with a short-range missile system or sub-surface munitions. The fifty will punch holes in a whole lot of stuff, but is no good against a larger target (or one that is submerged)."
Toss an Aegis on it.
Also, put enhanced radioactivity monitors and advanced video on them, place them in 100 miles increments along the coastline.
It seems designed for light duty - to take out drug and people traffickers at sea.