height indicator

There is a height indicator across the road with dangling chains for the approaching railway bridge which has a height of 4.1 metres.

This includes storage tubes used with planned position indicator displays, range height indicator displays, and pen-plotting boards used for civilian air traffic control and waterway management.

The output of this sounding is called a Range Height Indicator (RHI) which is excellent for viewing the detailed vertical structure of a storm.

The ancillary group consisted of an AN/OA-929 Range Height Indicator (RHI), which displayed the raw or anti-jam video, and allowed the operator to position the azimuth of the antenna.