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ACTV
STBY
CLR ENT
CRSR
SQ
NRST
RTE
WPT
NAV
MSG
OWNERS MANUAL
& REFERENCE
GNC 300TM
Pilots Guide
®
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Software Version 2.04 or above
© 1996 GARMIN Corporation
1200 East 151st Street, Olathe, KS 66062, USA
INTRODUCTION
Foreword
GARMIN (Europe) LTD, Unit 5, The Quadrangle, Abbey Park Industrial Estate,
Romsey, U.K. SO51 9AQ
All rights reserved. No part of this manual may be reproduced or transmitted in any
form or by any means, electronic or mechanical, including photocopying and record-
ing, for any purpose without the express written permission of GARMIN.
GARMIN™, GNC 300™, AutoLocate™,
MultiTrac8™, Spell’N’Find™, GPSCOM™
and AutoStore™ are trademarks of GARMIN
Corporation and may only be used with permis-
sion.
All rights reserved.
Information in this document is subject to change without notice. GARMIN reserves
the right to change or improve their products and to make changes in the content of
this material without obligation to notify any person or organization of such changes
or improvements.
May 1996
190-00067-00 Rev. A
Printed in USA
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INTRODUCTION
Cautions
NOTE: This device complies with Part 15 of the FCC
limits for Class B digital devices. This equipment gener-
ates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio communi-
cations. Furthermore, there is no guarantee that interfer-
ence will not occur in a particular installation.
If this equipment does cause harmful interference, the
user is encouraged to try to correct the interference by relo-
cating the equipment or connecting the equipment to a dif-
ferent circuit than the affected equipment. Consult an
authorized dealer or other qualified avionics technician for
additional help if these remedies do not correct the problem.
Operation of this device is subject to the following
conditions: (1) This device may not cause harmful inter-
ference, and (2) this device must accept any interference
received, including interference that may cause undesired
operation.
The GARMIN GNC 300 does not contain any user-
serviceable parts. Repairs should only be made by an
authorized GARMIN service center. Unauthorized repairs
or modifications could void your warranty and authority
to operate this device under Part 15 regulations.
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CAUTION
The Global Positioning System is operated by the United States government,
which is solely responsible for its accuracy and maintenance. The system is subject to
changes which could affect the accuracy and performance of all GPS equipment.
Although the GARMIN GNC 300 is a precision electronic NAVigation AID (NAVAID),
any NAVAID can be misused or misinterpreted and therefore, become unsafe.
Use the GNC 300 at your own risk. To reduce the risk of unsafe operation,
carefully review and understand all aspects of this Owner’s Manual and thoroughly
practice using the simulator mode prior to actual use. When in actual use, carefully
compare indications from the GNC 300 to all available navigation sources, including
the information from other NAVAIDS, visual sightings, charts, etc. For safety, always
resolve any discrepancies before continuing navigation.
The altitude calculated by the GNC 300 is geometric height above mean sea level
and could vary significantly from altitude displayed by pressure altimeters in aircraft.
Never use GPS altitude for vertical navigation.
The Jeppesen database incorporated in the GNC 300 must be updated regularly
in order to ensure that its information is current. Updates are released every 28 days.
A database information packet is included in your GNC 300 package.
Pilots using an out-of-date database do so entirely at their own risk.
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Accessories & Packing List
Congratulations on choosing the finest, most full-featured panel mount IFR GPS
COM available. The GNC 300 represents GARMIN’s commitment to provide an accu-
rate, easy-to-use GPS for all of your aviation needs.
Before installing and getting started with your unit, please check to see that your
package includes the following items. If any parts are missing or damaged, please see
your GARMIN dealer immediately.
Standard Package:
• GNC 300 unit & NavData® Card
• GPS Antenna
• Aviation Installation Kit
• Pilot’s Guide & Quick Reference Guide
• Database Subscription Packet
• Warranty Registration Card
Optional Accessories
• AC Adapter
• Personal Computer Interface Kit
• User Data Card
• 28 to 14 volt DC converter
• MD-41 External Switch/Annunciator
INTRODUCTION
Accessories and
Packing List
To obtain accessories for your GNC 300,
please contact your nearest GARMIN dealer.
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INTRODUCTION
Warranty
To obtain warranty service, see your local
dealer or call the GARMIN Customer Service
department for a returned merchandise
tracking number. The unit should be securely
packaged with the tracking number clearly
marked on the outside of the package, and
sent freight prepaid and insured to a
GARMIN authorized warranty service
facility.
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Every GARMIN GPS is built to exacting standards to provide years of
trouble-free service. GARMIN warrants this product to be free from defects
in materials and workmanship for one year from the date of purchase.
GARMIN International, Inc. will at its sole option, repair or replace any
components which fail in normal use. Such repairs or replacement will be
made at no charge to the customer for parts or labor. The customer is, how-
ever, responsible for any transportation costs. This warranty does not cover
failures due to abuse, misuse, accident or unauthorized alteration or repairs.
GARMIN International, Inc. assumes no responsibility for special, incidental,
punitive or consequential damages, or loss of use.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE
EXCLUSIVE, AND IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR
IMPLIED, INCLUDING ANY LIABILITY ARISING UNDER WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC
LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE.
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PART ONE: INTRODUCTION
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Accessories/Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iv
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v-vi
Key and Knob Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii-viii
GNC 300 Takeoff Tour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
PART TWO: REFERENCE
Section 1: Navigation with the GNC 300 ( N key) . . . . . . . . . . . . . . . . . .9
Navigating and planning functions
Section 2: Communicating with the GNC 300 . . . . . . . . . . . . . . . . . . . . .29
Using the GNC 300’s radio
Section 3: Waypoint and Database Information ( W key) . . . . . . . . . . . .32
Finding and using database and waypoint information
Section 4: Nearest Waypoints ( T key) . . . . . . . . . . . . . . . . . . . . . . . . .53
Finding nearest waypoints, SUAs and FSS frequencies
Section 5: Direct-to & Route Navigation ( R key) . . . . . . . . . . . . . . . . .58
Creating and using routes
Section 6: Approaches, SIDs & STARs ( R key) . . . . . . . . . . . . . . . . . . .72
Selecting and flying non-precision approaches
INTRODUCTION
Table of Contents
To quickly and easily locate
information on specific tasks, please refer to
the Index on page 125.
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INTRODUCTION
Table of Contents
vi
Section 7: Messages and Unit Settings ( M key) . . . . . . . . . . . . . . . . . .95
Appendix A: NavData® and User Data Card Use . . . . . . . . . . . . . . . .104
Appendix B: Installation, Removal and Maintenance of the GNC 300 .106
Appendix C: Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Appendix D: GNC 300 Abbreviations and Messages . . . . . . . . . . . . . .109
Appendix E: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Appendix F: Map Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Appendix G: Troubleshooting/Q & A . . . . . . . . . . . . . . . . . . . . . . . . .121
Appendix H: Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
GARMIN is fully committed to your satisfaction as a customer. If you have any
questions regarding the GNC 300, please contact our customer service department at:
GARMIN International, Inc.
1200 East 151st Street
Olathe, KS 66062
(913) 397-8200
FAX (913) 397-0836