The F-35 Generation III Helmet Mounted Display System (HMDS) manufactured by Rockwell Collins is the world’s most advanced biocular helmet-mounted display system—bringing unprecedented visual capability to the world’s most advanced tactical aircraft. Notably, it is also the world’s most expensive helmet. The cost of each custom-made helmet is more than $400,000 USD. This special helmet has been designed to provide pilots with revolutionary situational awareness. The main features of the helmet, which has a custom liner for precise fit and comfort, include virtual head-up display, high accuracy tracking with auto-boresighting, active noise reduction, digital night vision sensor, and much more. Its integrated head-up display is the first to provide pilots with all the critical information they need on the helmet’s visor ensuring that every mission, day or night, is supported with unsurpassed situational awareness, tactical capability and safety. When a pilot looks down, he usually sees the floor of the aircraft. With the Rockwell Collins helmet, instead of seeing the floor of the airplane, he sees the world below him external to the aircraft. If the pilot looks up or behind him, he sees the sky.