Garmin 255A manual Getting Started, Product Description

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1 GETTING STARTED

1.1Product Description

Combining a powerful VHF communications transceiver with 200 channel VOR, Localizer and Glideslope receivers, the GNC 255 provides a full-functioned navigation and communications solution in a small footprint at a very affordable price. Besides traditional Nav/Com features, the GNC 255 also incorporates workload-reducing functions such as automatic decoding of the Morse code station identifier for VOR/LOC, most-used frequency storage in memory, built- in course deviation indicator, and more.

The GNC 255 has the ability to monitor the standby Com frequencies. The GNC 255’s Com radio operates in the aviation voice band, from 118.000 to 136.975 MHz, in 25 kHz steps (default). For European operations, a Com radio configuration of 8.33 kHz steps is also available. The GNC 255 VHF Nav receiver operates from 108 MHz to 117.95 MHz decoding both the VHF Omni Range and Localizer navigation signals. The built-in Glideslope receiver will automatically tune the corresponding glideslope paired frequencies (328 MHz to 335 MHz) when the localizer is tuned. The GNC 255 is available in 10 and 16 watt com transmitter versions. The GNC 255A is available with a 10 watt com transmitter. The GNC 255B is available with a 16 watt com transmitter.

Photo Sensor

Power On/Off,

Com Volume,

Squelch On/Off

Nav (VLOC)

Volume, Nav ID

On/Off

Frequency

Monitor Key

Com or Nav

Frequency Selection

OBS Selection

To/From Selection

Locking

Frequency Transfer

Screw

(FLIP/FLOP) Key

USB Port

LARGE and

SMALL Knobs

(Frequency

Adjust)

Enter Key

Clear Data Key

Function Selection

Figure 1-1 GNC 255 Front Panel Description

190-01182-01 Rev. A

Garmin GNC 255A/255B Pilot’s Guide

1-1

Image 13

Contents GNC 255A/255B November Limited Warranty 190-01182-01 Rev. a Iii Operation US Toll Free Canada Toll Free Product Registration and SupportRecord of Revisions Contents 2.2 2.12.3 Index Index-1 This page intentionally left blank Product Description Getting StartedNav Volume/ID Knob Power/Com Volume/Squelch KnobPilot Controls FLIP/FLOP Key Tuning LARGE/SMALL Concentric Cursor Knobs5 C/N Com/Nav Key OBS KeyFunc Function Key USB PortMON Monitor Key Com Radio Power OnSelecting a Com Frequency Saving a Com Channel Monitoring the Standby Com ChannelAfter selecting the desired characters, press ENT After making a selection, press ENT DescriptionFrequency Database Reverse Look-Up Com Database Look-UpStuck Mic Emergency ChannelRemote Frequency Selection Control Selecting a Nav Frequency Nav RadioSaving a Nav Channel 01-36 Listening to the Nav Audio Channel14 CDI Display OBS Mode15 DST Data Display Distance/Speed/Time DST DisplayThis page intentionally left blank Functions Description FunctionsRecent Com Frequencies Com FrequenciesTurn the Small knob to select an Entry Press the CLR key to delete this User frequency Com User FrequenciesFrequencies. Press ENT Editing a Com User FrequencyCom Database Frequencies Com Database FrequenciesNearest APT function. Then, press ENT Com Nearest Airports APTTurn Small Knob To Scroll Through Available Frequencies Com Nearest Area Control Center ACC Frequencies13 Com Nearest FSS Frequencies Com Nearest Flight Service Station FSS Frequencies14 Com Nearest Weather Frequencies Com Nearest Weather WX FrequenciesRecent Nav Frequencies Nav FrequenciesPress the ENT key to delete the displayed frequency Nav User FrequenciesEditing a Nav User Frequency 21 Nav Database Frequencies Nav Database FrequenciesNav Nearest VOR When duplicate identifiers are found, press ENTAdjust Intercom ICS ConfigurationTurn the Small knob to display the available VORs Functions displayTurn the Small knob to turn the Aux Audio On or Off Aux AudioSpeaker On/Off Intercom On/OffIntercom On/Off function. Then, press the ENT key Speaker On/Off function. Then, press ENTCom Spacing System Configuration34 Set Display Brightness Display BrightnessDatabase Info Display ContrastDisplay Contrast function. Then, press the ENT key Database Version function. Then, press the ENT keyLoad Database function. Then, press the ENT key Load DatabaseSerial Number Software VersionSoftware Version function. Then, press the ENT key Press the Func key to return to the main menuSetting Up the Count Down Timer TimersTo select a starting timer value Viewing Timers in the Com Display Setting Up the Count Up TimerPressing CLR and then ENT will reset the displayed Timer Pressing ENT twice will stop the displayed Timer48 Count Down Timer Value Now Counting Up This page intentionally left blank Appendix TroubleshootingOr disabled via a Remote mounted It can be enabledIf in Lock Out mode Calibration error Recalibrate resolverUpdating the Frequency Database Messages Switch has been Power has been Re-apply power to the unitVerify glideslope deviation Property withInstallations All installationsRemote com Been in pressedNot communicating Nav radio is Contact dealer for serviceProperty with System This page intentionally left blank Index Remote frequency control 2-5 Reverse look-up 2-4 Revisions