They say that the best defense is a good offense, so I think the Mk 110 has the best of both worlds. The Mk110 is the main weapon used about the US Navy’s Littoral Combat Ships as a powerful defense and offensive weapon for hostile vessels.
These days naval vessels are more likely to encounter smaller-scale threats such as unmanned aerial drones and small boats. The Mk110 can deal with a variety of threats to its smart rounds which can program themselves to launch depending on threats. They can be programmed to launch powerful blasts large ships, explode above a target releasing shrapnel deter living targets.
“The 57mm Mk110 has this flexibility, which is proven by the fact that it is the deck gun of choice for the US Coast Guard’s National Security Cutter and offshore patrol cutter classes of ships, as well as for the US Navy’s LCS ships.”
Needless to say, those coast guard boats are in pretty good hands if anything tries to sneak up on them. Check out this demonstration of the Mk110 as some well-versed weapons professionals give it go in this clip. You will be very impressed by what it can really do when it gets going.