Boeing SVS is developing Dual Line of Site (DLOS) research. DLOS features two optical paths working at the same time: a receiver of a laser beam, and a transmitter that sends on the beam to a target. DLOS has become a part of other programs and systems, such as the Aerospace Relay Mirror System and is designing very short-range (6-mile, or 10-kilometer) tactical weapons called the Relocatable High-Energy Laser System. Field tests in late 2006 showed that the Relocatable High-Energy Laser System's mirror system on wheels can align with a stationary laser source and receive an optical signal from it.