Traffic Page Fields; Air Shield - Garmin GNC 420W Pilot's Manual Addendum

3. Return to the Traffic Page by pressing CLR.
Traffic Page Fields
There are two selectable fields on the Traffic Page:
the Operating Mode Field and the Barometric Pressure
Field. The Operating Mode Field selects the TCAD
operating mode. Please, refer to the TCAD Pilot' s
Handbook for a complete description of all modes of
operation. For the 9900BX model, this field is replaced
with the SKYWATCH style altitude mode.
TCAD 9900B Operating Modes:
GND: ground mode
TML: terminal mode
STD: standard mode
ENR: en route mode
UNR: unrestricted mode
The modes APR (approach) and DEP (depar-
ture), are displayed when in that mode, but
are not manually selectable.
To select the Operating Mode:
1. From the Traffic Page, press CRSR to highlight
the operating mode field.Turn the small right
knob to select the desired operating mode and
press ENT.
NOTE: The traffic display range is automatically set to
the shield size and cannot be changed (9900B only).
The second selectable field, located in the upper
right-hand corner of the display, is the Barometric
Pressure field, which displays the Barometric Pressure
in inches of mercury. The Barometric Pressure field
on the Traffic Page allows you to set the barometric
pressure in the Ryan TCAD unit. Please, refer to the
TCAD Pilot' s Handbook for a detailed description of
this feature.
The Barometric Pressure field is located in
the upper right-hand corner of the Traffic
Page.
To change the Barometric Pressure:
From the Traffic Page, press the cursor to
1.
highlight the Operating Mode field. Turn the
large right knob to select the Barometric
Pressure Field. Use the small right knob to
select the desired value and press ENT. Note:
When editing the value, use the large right
knob to select the digit to edit.
2. Exit the field by pressing the CRSR button.
When the TCAD 9900BX model is interfaced
there is an additional annunciation in the lower left
hand corner of the Traffic Page. This indicates when
the TCAD unit is in approach mode (APR), or if the
approach is armed (APR ARM).

Air Shield

Please, refer to the TCAD Pilot' s Handbook for a
detailed description of the Air Shield.
Section 4
Ryan TCAD Interface
19