Avionics
FAA Issues Advisory Circular Outlining New EFVS Ops
Under a new rule issued last December, enhanced flight vision systems are going to be much more useful.
The EFVS view through a head-up display.
The EFVS view through a head-up display.

After changing the rules to allow the use of enhanced flight vision systems (EFVS) instead of natural vision to descend below 100 feet above touchdown zone elevation (TDZE) then land and roll out, the FAA has now published Advisory Circular (AC) 90-106A to explain how operators can use the new regulations. EFVS was first allowed in January 2004, allowing pilots to fly to 100 feet above TDZE using approved EFVS, typically infrared sensor-derived imagery projected on a head-up display (HUD). The pilot then had to use natural vision to land and roll out. 

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