The military wants 'robot ships' to replace sailors in battle

The missile test was a crucial step for the Navy's autonomous vessel program, an extensive initiative to develop 21 robot ships over the next few years. The program is a direct response to countries such as China, which have been building sophisticated missile technology to target ships that approach their shores. Robot vessels could be a cheaper and more effective way to protect the seas while putting fewer sailors' lives at risk, former naval officers said.