GNC 255A/255BPilot’s Guide
viiiGarmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3 Functions ...
ix190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.6.3 Viewing Timers in the Com Display ...3-244 Appendix
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1-1190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide1 GETTING STARTED1.1 Product DescriptionCombining a powerful VHF communications transceiver
1-2Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A1.2 Pilot ControlsThe GNC 255 controls have been designed to simplify operation of the system
1-3190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide1.2.3 Tuning LARGE/SMALL Concentric (Cursor) Knobs The LARGE right and SMALL right knobs a
1-4Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A1.2.10 FUNC (Function) Key The FUNC (Function) key accesses function categories for the fo
2-1190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide2 BASIC OPERATION2.1 Power On Turn the GNC 255 on by either turning the Power/Com Volume/S
2-2Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A2.2.2 Monitoring the Standby Com ChannelThe Frequency Monitoring function allows you to moni
2-3190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide 5. Turn the LARGE knob to select the waypoint Type. 6. Turn the SMALL knob to select
© 2012 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of System Software version 2.00, or later. Some differ
2-4Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A2.2.4 Com Database Look-Up 1. Press the CURSOR knob from the Com display to activate the d
2-5190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide2.2.6 Emergency Channel 1. Press and hold the FLIP/FLOP key or the Com Remote Transfer (
2-6Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A2.3 Nav Radio2.3.1 Selecting a Nav FrequencyThe selection of Nav frequencies is the same as
2-7190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide 5. Turn the LARGE knob to select the waypoint Type. 6. Turn the SMALL knob to select
2-8Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A2.4 OBS ModeIf your system is configured with an external CDI/HSI, the OBS radial of your remo
2-9190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide2.5 Distance/Speed/Time (DST) DisplayWhen the GNC 255 has received data from an external dev
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3-1190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3 FUNCTIONSThe Functions section allows provides information about Com Frequencies, Nav Frequ
3-2Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A 1. Press the FUNC key to access the Functions. 2. Turn the LARGE knob to select t
3-3190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.2.2 Com User FrequenciesFifteen Com User Frequencies can be saved with an assigned waypoint
i190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideLIMITED WARRANTYAll Garmin avionics products are warranted to be free from defects in materials
3-4Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A 2. Press the ENT key to confirm deletion of the displayed frequency. 3.2.2.3 Editing a
3-5190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.2.3 Com Database FrequenciesThe GNC 255 contains a large database of Com frequencies that m
3-6Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.2.4 Com Nearest Airports (APT)The GNC 255 will report the 25 nearest Airports (APT), when i
3-7190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.2.5 Com Nearest Area Control Center (ACC) FrequenciesThe GNC 255, when interfaced with an a
3-8Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.2.6 Com Nearest Flight Service Station (FSS) FrequenciesThe GNC 255, when interfaced with a
3-9190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.2.7 Com Nearest Weather (WX) FrequenciesThe GNC 255, when interfaced with an appropriate GP
3-10Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.3 Nav FrequenciesThe Nav Frequencies category in the Functions section contains remotely a
3-11190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.3.2 Nav User FrequenciesUp to 15 Nav User Frequencies can be saved with an assigned waypoi
3-12Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.3.2.3 Editing a Nav User Frequency 1. Press FUNC. Turn the LARGE knob to reach the Nav f
3-13190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.3.3 Nav Database FrequenciesThe GNC 255 contains a large database of Nav frequencies that
iiGarmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A WARNING: For safety reasons, GNC 255 operational procedures must be learned on the ground.
3-14Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. ADuplicate Identifiers 1. When duplicate identifiers are found, press ENT. Duplicate Ident
3-15190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide 2. Turn the SMALL knob to display the available VORs. 3. Press the ENT key to accep
3-16Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.4.2 Aux AudioThe Aux function allows you to turn Aux Audio On/Off and set the volume valu
3-17190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.4.3 Intercom On/OffThe Intercom On/Off function toggles intercom on and off. The intercom
3-18Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.5 System ConfigurationThe System Configuration function will show the Software Version, Dat
3-19190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.5.2 Display BrightnessAs it arrives from the factory, the GNC 255 automatically adjusts it
3-20Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.5.3 Display ContrastThe Display Contrast has a range from -50 (Low Display Contrast) and
3-21190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.5.5 Load DatabaseThe GNC 255 has a USB connector to allow for easily updating the system
3-22Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A 5. Wait until the updating process is complete and then remove the memory device and cabl
3-23190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide3.6 TimersThe GNC 255 has both Count Up and Count Down timers, which may operate simultaneou
iii190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide NOTE: Canadian installations: In accordance with Canadian Radio Specifications Standard 102
3-24Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A3.6.2 Setting Up the Count Up Timer 1. Press FUNC to access the Functions. Turn the LARG
3-25190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideWhen the Count Down Timer reaches 0:00, it will continue counting as a Count Up value. The C
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4-1190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s Guide4 APPENDIX4.1 TroubleshootingIf efforts to resolve the problem fail, contact your dealer or t
4-2Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. AProblem Possible Cause ActionGNC 255 does not power on No power to the GNC 255Check power con
4-3190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideProblem Possible Cause ActionDisplay shows “Incorrect Calibration Checksum” at start-upCorru
4-4Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. A4.3 MessagesWhen a Message has been issued by the unit, the Message will be shown on the disp
4-5190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideMessage Description ActionCOOLING FAN - The cooling fan has failed. The GTN cooling fan is p
4-6Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. AMessage Description ActionREMOTE KEY STUCK - Com remote transfer key is stuck. The remote co
4-7190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideMessage Description ActionREMOTE KEY STUCK - Nav remote transfer key is stuck. The remote na
ivGarmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. ANOTE: This device complies with Part 15 of the FCC limits for Class B digital devices. This e
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Index-1190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideINDEXAAppendix 4-1BBasic operation 2-1Brightness 3-19CCautions ii, 2-6Clear 1-3Com d
Index-2Garmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. ARRecent com frequencies 3-2Recent nav frequencies 3-10Record of Revisions viRegistrati
© 2012 GARMIN CorporationGARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. Tel. 913/397.8200 or 800/800.1020 Fax 913/39
v190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideProduct Registration and SupportHelp us better support you by completing your online registrati
viGarmin GNC 255A/255B Pilot’s Guide190-01182-01 Rev. ARecord of RevisionsPart Number Revision Date Description190-01182-01 A 11/19/12 Initial releas
vii190-01182-01 Rev. AGarmin GNC 255A/255B Pilot’s GuideContentsProduct Registration and Support ..............
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