By 
NATIONAL HARBOR, Md.—The Navy in March began underwater testing of its first extra-large unmanned underwater vehicle (XLUUV), which will help reduce risk on the first five prototype vessels, a Navy official said on Tuesday. “Initial results are good,” Capt. Scott Searles, program manager of the Unmanned Maritime Systems Program Office within the Program Executive Office for Unmanned and Small Combatants, said during the Navy League’s Sea-Air-Space conference here. The reason behind having the XLEO vehicles is the “test, fix, test”…
