It looks like a regular helmet for pilots. But put it on, and no matter which direction your head turns you will be able to read vital information found on cockpit dials or head-up displays. The Crew System Department of the Naval Air Warfare Center Aircraft Division (Patuxent River, MD) is working on the design for the Helmet Mounted Display (HMD) Technologies Program. Electronics and optics in HMD will put more in the pilot's line of sight than such information as air speed, attitude, and weapons status. The new helmet, expected to be ready in five years, will enable pilots to lock onto a target simply by turning the head--instead of the plane--toward the target.