DARPA launching robotic sub hunting ship on April, 2016

The DARPA Anti-Submarine Warfare (ASW) Continuous Trail Unmanned Vessel (ACTUV) is developing an unmanned vessel optimized to robustly track quiet diesel electric submarines.

DARPA estimates using an unmanned vessel instead of a similarly-sized manned one will be save an order of magnitude on the cost of daily operation.

The ACTUV will instead be 132 feet long and weighing 140 tons.

SOURCEs Popular Science