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Each shield volume is easily programmable by the pilot (see
Appendix 1). Once programmed, the shield volumes are
retained in memory for future flights.
The Shield limits are found in Specifications, Appendix 4.
GROUND MODE
When the host aircraft is on the ground, traffic taxiing or
parked nearby can transmit replies. To avoid nuisance
indications on the ground, a special feature called the
Ground Mode is automatically activated upon startup. The
range limit of the Ground Mode is the same as the Terminal
mode, and the height is the same as the Standard mode.
Traffic at and below 100 feet above the host elevation will
not be displayed. Alert tones are also muted. Thus data
available from aircraft in the air are displayed, and those
identified as on the ground are not displayed.
The Ground Mode is activated automatically upon startup
or, after landing, by pressing the TRML and STD buttons
simultaneously. The display shows the letter "G" in the
mode cell, and the small letter "M" is displayed indicating
that the alert tones are muted.
TCAD will automatically transition from Ground Mode to
Enroute Mode after takeoff. When the host aircraft climbs
more than 200 feet, the alert tones are restored (the "M"
disappears from the display), and a transition symbol "Dp"
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