Garmin MX20 - Manual (Page 55)


Detailed Operation
ADS-B Traffic
Additionally, UAT systems provide a VFR mode that may be used by pilots when not wanting to receive air
traffic services. The “Set 1200” feature will broadcast a “VFR” Flight ID to other aircraft and ground receivers,
similar to using a “1200” transponder code.
ADS-B is intended to be used both in-flight and on the airport surface. ADS-B systems should be turned “on”
-- and remain “on” -- whenever operating in the air and on the airport surface, unless a change to “standby”
was requested by ATC.
The ADS-B cockpit display of traffic is NOT intended to be used as a collision avoidance system and does
not relieve the pilot’s responsibility to “see and avoid” other aircraft. ADS-B shall not be used for avoidance
maneuvers during IMC or other times when there is no visual contact with the other target aircraft. ADS-B is
intended only to assist in visual acquisition of other aircraft. No avoidance maneuvers are provided for,
nor authorized, as a direct result of an ADS-B target being displayed in the cockpit.
Use of ADS-B surveillance services is limited to the service volume of the GBT. Note that the coverage volume of GBTs is
limited to line-of-sight.
Traffic Description
Your position is located at the tip of the empty triangle (Ownship symbol). The other traffic is shown as a large solid
arrow pointing in its direction of travel. Next to the traffic arrow symbol is the traffic identifier, and altitude. Altitude
is selected as either Pressure or Relative Altitude as noted in the upper left corner of the display.
A small up or down arrow next to the identifier indicates that the traffic is climbing or descending at a rate of
at least 500 feet per minute. The end of the vector line that extends beyond the point of the traffic arrow indi-
cates where it will be at the end of the selected time interval. The currently selected time interval is indicated in
the upper left corner of the display.
TIS-B Traffic
Traffic Information Service – Broadcast (TIS-B) is supported by displaying non ADS-B equipped aircraft that are
received over the UAT data link radio. Non ADS-B equipped aircraft that are detected by ground-based radar
can be up-linked to all aircraft in the area that are UAT data link equipped and within the GBT service volume.
ADS-B Traffic information detail