Garmin GNC 420W Краткая справка - Страница 17

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Selecting Approaches

In order to select an approach, you must ﬁrst

have an active direct-to or ﬂight plan that termi-

nates at an airport with a published approach.

Press the PROC key to display the procedures

page.

Turn the large right

knob to highlight "Select

Approach?" and press

the ENT key.

A window will appear

listing the available pro-

cedures. Turn the large

right knob to highlight

the desired procedure

and press the ENT key.

A second window will

appear listing the avail-

able transitions. Turn the

large right knob to high-

light the desired transition

waypoint and press the

ENT key. The approach "Vectors" option assumes

you will receive vectors to the ﬁnal course segment

of the approach and will provide navigation guid-

ance relative to the ﬁnal approach course.

Turn the large right knob to highlight "Load?"

or "Activate?" and press the ENT key. "Load?"

will add the procedure to the ﬂight plan without

immediately using it for navigation guidance. This

allows you to continue navigating the original ﬂight

plan, but keeps the procedure available on the

active ﬂight plan page for quick activation when

needed. "Activate?" overrides the "en route" por-

tion of the active ﬂight plan, proceeding directly to

the "approach" portion.

APPROACHES

For non-GPS approved approaches, a reminder

window will appear indi-

cating that GPS guidance

on such approaches is

strictly for monitoring

only—use the VLOC

receiver and external CDI

(or HSI) for primary navigation. To conﬁrm this

reminder, highlight "Yes?" and press the ENT

key.

Not all approaches in the database are approved for

GPS use. As you select an approach, a

tion to the right of the procedure name indicates the

procedure can be ﬂown using the GPS receiver. Some

procedures will not have this designation, meaning the GPS

receiver may be used for supplemental navigation guidance

only. If the GPS receiver cannot be used for primary guid-

ance, you must use the appropriate receiver for the selected

approach (e.g., VOR or ADF). The ﬁnal course segment of

ILS approaches, for example, must be ﬂown by tuning

the VLOC receiver to the proper frequency and coupling

the VLOC receiver to the external CDI (or HSI).

A selected approach may be activated or loaded. Activat-

ing the approach overrides the "en route" portion of the

active ﬂight plan, proceeding directly to the "approach"

portion (for a full approach, directly to the approach

transition). Activating the approach also initiates automatic

CDI scaling transitions as the approach progresses.

In many cases, it may be easiest to "Load" the full

approach while still some distance away, en route to the

destination airport. Later, if vectored to ﬁnal, use the

following steps to select "Activating an Approach with Vec-

tors-To-Final"—which makes the inbound course to the

FAF waypoint active. Otherwise, activate the full approach

using the "Activate Approach?" option.

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