INDICATIONS OVER DME. In case helicopter is flying directly to DME, its
position overhead DME is indicated by rapid decrease in distance up to its height in nm
or by a dropout of
the indications. If
not tracking to or
away from a DME
station, the
closure rate will
decrease
gradually and
read zero, when
helicopter
reaches an
abeam position.
At this point the
distance indicated will be minimum. If continued, closure rate would increase with
increasing distance