PPRuNe Forums - View Single Post - What's This?
Thread: What's This?
View Single Post
Old 3rd July 2005 | 10:12
  #4 (permalink)  
paddyboy
20 Anniversary
 
Joined: Feb 2004
Posts: 164
Likes: 0
From: Great Britain
They're used to measure RVR.
paddyboy is offline