T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019 Page: 47
1.2.3.17 MARKER BEACON
The marker beacon is located to the right of the HSI above the FUEL QTY panel. Unlike
general aviation, where the markers are colour coded, in the F-16 it is only green but
blinks at a different frequency (with varying sound cues), according to the marker
overflown.
Marker beacons are short range transmitting devices placed alongside ILS approaches
and provide visual and audio cues when overflown. There are normally three markers: inner, outer and
middle markers along an ILS track. In BMS we only have outer (OM) and inner markers (IM)
implemented. They provide range information to the runway.
Outer markers are usually placed between 4 and 7 Nm (usually 6 Nm) from the runway threshold and
are at the point where the glideslope should be intercepted.
Inner markers are placed closer to the runway, usually 3500 feet and should be heard and seen in the
cockpit around 200ft above the ground, usually near the minima.
In BMS both markers light up the MRK BCN indicator making it flashes at different frequencies: (low
frequency for outer marker and higher frequency for inner marker). See the BMS-Comms-Nav-book in
your Docs folder for further information.
Please note: when the approach track is over water (e.g. Kunsan) the beacons are not installed.
1.2.3.18 FUEL FLOW indicator
Located above the RIGHT MFD this gauge displays the current fuel flow being
consumed by the engine (including in Afterburner) in pounds per hour (pph).
The gauge has a range from 0 to 80000 pph and is powered by the emergency
bus.
1.2.3.19 Backup ADI
The backup ADI is located above the RIGHT MFD and is the primary attitude
backup instrument.
It does not need power and will function even when the main ADI is flagged
OFF.
1.2.3.20 Right INDEXER
The RIGHT indexer features three coloured indicators arranged vertically.
The top one is blue and labelled RDY. It is relevant to the air-refuelling (AR) system
and comes on whenever the system is ready for air to air refuelling. In BMS this
indicator comes on as soon as the AR door is opened.
The centre indicator is green and labelled AR/NWS.
AR is only relevant when the aircraft is in the air and comes on whenever the boom is
inserted and has good contact with the AR receptacle on the back of the F-16.
NWS is relevant only when the aircraft is on the ground. It comes on when the Nose
Wheel Steering system is engaged, allowing the pilot to steer the aircraft using the rudder pedals to
control direction. It is recommended that nose wheel steering only be engaged below 70 knots on
landing and takeoff rolls and during taxiing.
The Bottom indicator is amber and labelled DISC. It is also relevant to the AR system and illuminates
when the pilot commands a disconnect from the boom.
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