And it is different how?
There is quite a difference between radio height and a radar altimeter.
BOAC
XUBS1.jpg | arrakis | Fotki, Zdj?cia, Obrazki Fotosik.pl
XUBS2.jpg | arrakis | Fotki, Zdj?cia, Obrazki Fotosik.pl
XUBS3.jpg | arrakis | Fotki, Zdj?cia, Obrazki Fotosik.pl
There were some changes since 2006 (see transcript).
Arrakis