The US has Mk38 canon on lots of ships. The Mod3 added radar. Its primary focus is against small boats and could probably work against USV that Ukraine has been

The US has Mk38 canon on lots of ships. The Mod3 added radar. Its primary focus is against small boats and could probably work against USV that Ukraine has been using against Russia. I hope the Navy is working in modifying to work against small and medium drones. The other thing that might help against drones are the automated weapons stations hat are on lots of vehicles. I think I read about project to add radar and automated targeting of drones.