Posted for larry.eversmeyer@faa.gov:

 I agree with Tim.  I two have 1000 hours flying night vision goggles.
 There are eleven illusions you have to know about and live with.  They are
 a great piece of equipment, if you had training and stay proficient.
 
 Larry Eversmeyer
 Legacy (building)

"""
 I concur with Jeff?s observations.  I have used FLIR and night vision
 goggles.  The night vision goggles penetrate fog and smoke much better
 than the FLIR.
 
 Even if you mounted the night vision goggles on a helmet like we used in
 the Army, and had NVG lighting in the cabin, you would still have to
 contend with a major issue?.Depth perception.  It takes a lot of training
 and currency to use them effectively, especially for a night landing.
 
 Regards,
 
 Timothy Ong

  """
   I had the opportunity to operate Navy FLIR's onboard the A-6 Intruder. One
   of the limits of the FLIR is it cannot see through smoke,dense fog or
   clouds. It works on temperature differential and if the obscuring
   phenomona is thick enough --everything is nearly isothermic.
 
   Jeff Edwards
   LIVP
  """
"""