Garmin GPSMAP 400 series Pilot's Manual Addendum - Page 24

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Section 4

Ryan TCAD Interface

The Barometric Pressure ﬁ eld is located in the

upper right-hand corner of the Trafﬁ c Page.

TCAD 9900B Operating Modes:

GND: ground mode

TML: terminal mode

STD: standard mode

ENR: enroute mode

UNR: unrestricted mode

The modes APR (approach) and DEP (departure),

are displayed when in that mode, but are not

manually selectable.

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.

To change the Barometric Pressure:

1. From the Traffic Page, press the cursor to 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 the TCAD unit being 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.

Traffic Warning Window

When the unit is not on the traffic page and a traffic threat is imminent, the Traffic Warning Window

is displayed. The Warning Window shows a small thumbnail map and can display the Traffic Page (if the

user presses ENT) or return to the previous page (if the user presses CLR).

The Trafﬁ c Warning Window is disabled when the aircraft ground speed is less than 30

knots or when an approach is active.