Garmin GNC 250 User manual

GNC 250

Pilot’s Quick

Reference Guide

ACTV STBY GNC 250

NAVWPTRTENRSTSQ MSG

CLR ENT

CRSR

250 Quick Ref 7/14/98 9:14 AM Page 1

250 Quick Ref 7/14/98 9:14 AM Page 2

CURSOR/DATA ENTRY

CURSOR CONTROL

The cursor key is used to activate and deactivate the cursor in the comm and

GPS windows, and is used to highlight fields for data entry, changing display

data or cycling through available options.

Pressing

once activates the cursor in the comm window, and is indicated

by a < > around the standby frequency (see above).

Pressing

again moves the cursor to the GPS window and is indicated by a

flashing field. Pressing

a third time turns the cursor off.

Comm

Window

}

GPS

Window

}

{

250 Quick Ref 7/14/98 9:14 AM Page 3

DATA ENTRY

The outer knob is used to advance through pages, select comm frequency

(MHz), advance the cursor or move through data fields.

The inner knob is used to change data, select comm frequency (KHz), or scroll

through additional information that cannot fit on the screen.

The clear key is used to erase information or cancel an entry.

The enter key approves operations and confirms data entry and prompts.

CURSOR/DATA ENTRY

ACTV STBY GNC 250

NAVWPTRTENRSTSQ MSG

CLR ENT

CRSR

250 Quick Ref 7/14/98 9:14 AM Page 4

FLYING START

POWER UP

❏

Insert data card in card slot.

❏

Rotate the power/volume knob

clockwise to turn the unit on and adjust volume. The

welcome page will appear while the unit performs a self test.

❏

Press

to confirm the database prompt.

❏

Satellite acquisition will begin and the unit will display a ‘Ready for Navigation’ message once

a position fix has been calculated.

❏

To view messages, press the

key.

SELECT ACTIVE AND STANDBY FREQUENCIES

❏

Press

to activate the cursor in the standby frequency field.

❏

Rotate

and

to dial in the desired active frequency.

❏

Press

to place the selected frequency in the active field.

❏

Rotate

and

to dial in the desired standby frequency.

250 Quick Ref 7/14/98 9:14 AM Page 5

TO SELECT A DIRECT-TO DESTINATION:

❏

Press

❏

Rotate

to select the first character of the destination waypoint’s identifier. Remember to

use the ICAO identifier if you are entering an airport as your destination (i.e., KOSH for

Wittman Regional Airport).

❏

Rotate

one stop to the right to advance the cursor to the next character position, and use

to select the next character of the identifier.

❏

Repeat steps 2 and 3 until the desired waypoint is displayed.

❏

Press

to confirm the identifier. The direct-to confirmation page will appear, showing the

position of the selected destination and the course from your present position.

❏

Press

to confirm the direct-to destination. The navigation page will appear, displaying

detailed navigation data to your destination. The graphical CDI at the upper left corner of the

page indicates the distance and direction you are off course on a 5.0 nm scale.

FLYING START

250 Quick Ref 7/14/98 9:14 AM Page 6

TO SELECT COMM FREQUENCIES:

❏

Press

repeatedly to highlight the standby field (e.g., “<121.75>”).

❏

Rotate

to select the desired megahertz (to the left of the decimal).

❏

Rotate

to select the desired kilohertz (to the right of the decimal).

❏

Press

twice to remove the cursor from the comm and GPS windows.

TO EXCHANGE ACTIVE AND STANDBY FREQUENCIES:

❏

Press the

button.

TO ADJUST THE AUDIO VOLUME:

❏

Rotate the

power/volume knob.

TO OVERRIDE THE AUTOMATIC SQUELCH:

❏

Press the

squelch key. Press

again to return to automatic squelch.

COMMUNICATION

250 Quick Ref 7/14/98 9:14 AM Page 7

TO AUTO-TUNE A FREQUENCY DISPLAYED

IN THE GPS DATABASE:

❏

Press

with the cursor off to select the

frequency as the standby frequency.

TO AUTO-TUNE A FREQUENCY FROM A LIST IN THE GPS

DATABASE:

❏

Press

twice to activate the cursor in the

GPS window.

❏

Rotate

to highlight the desired frequency.

❏

Press

to place the frequency in the standby field.

TO AUTOMATICALLY TUNE FOR EMERGENCY TRANSMISSION:

❏

Press and hold the

key for > 2 seconds.

COMMUNICATION

250 Quick Ref 7/14/98 9:14 AM Page 8

Waypoint Category

Each waypoint category features

a set of waypoint pages accessible

by rotating the outer knob with the

cursor inactive.

Proximity Waypoint Page

User Waypoints Page

Waypoint Comments Page

Airport Identification

Airport Comments

Airport Position

Airport Communications

Airport Runway

WAYPOINT & AIRPORT INFO

The WPT key is used to view position, runway, frequency

and other information on airports, VORs, NDBs, inter-

sections and user waypoints. To scroll through the way-

point pages, press WPT and rotate the outer knob.

250 Quick Ref 7/14/98 9:14 AM Page 9

TO ACCESS APT INFORMATION:

❏

Press the

key.

❏

Press

twice to activate the cursor.

❏

Press

to confirm the ‘apt?’ category. The airport

identification page will appear with the identifier

field ready for entry.

TO ENTER APTS BY IDENTIFIER:

❏

Highlight an identifier field, and enter the identifier.

❏

As the identifier is entered, the GNC 250 will dis-

play any waypoints with the same identifier letters

you have entered to that point.

❏

When the desired airport is displayed, press

TO SELECT AN APT BY FACILITY

NAME OR CITY:

❏

From the airport identification page, highlight the

second field in the GPS window to enter the city

name, OR:

highlight the last field in the GPS window to enter

the facility name.

❏

Enter the city or facility name of the airport.

❏

Press

to finish.

WAYPOINT & AIRPORT INFO

250 Quick Ref 7/14/98 9:14 AM Page 10

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