marker beacons Flashcards
what do marker beacons provide
RANGE over specific points along the approach
what does the marker beacons transmit at
75 MHz
where is the OM
Outer Marker
4-7 miles
what does the OM indicate
Outer Marker
indicates the position at which ten aircraft should intercept the glide slope at the appropriate interception altitude ±50’
what color and morse code is the OM
Outer Marker
blue & “- - -“
where is the MM
Middle Marker
~3500’ from the runway & usually 200’ above the runway threshold
what does the MM indicate
Middle Marker
indicates the approximate point where the gs meets the decision height (DH)
what color & morse code is the MM
Middle Marker
amber & “. - . -“
where is the IM
Inner Marker
between runway threshold and Middle Marker
what does the IM indicate
Inner Marker
glide slope meets the DH on a CAT ll ILS approach
what color and morse code is the IM
Inner Marker
white & “. . .”
