Manuals / Garmin / Marine Equipment / Marine Radio

Garmin 255A manual 190-01182-01 Rev. a

Models: 255A

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WARNING: For safety reasons, GNC 255 operational procedures must be learned on the ground.

CAUTION: The Garmin GNC 255 does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modifications could void both the warranty and the pilot’s authority to operate this device under FAA/FCC regulations.

CAUTION: The GNC 255 display uses a lens coated with a special anti- reflective coating that is very sensitive to skin oils, waxes, and abrasive cleaners. CLEANERS CONTAINING AMMONIA WILL HARM THE ANTI- REFLECTIVE COATING. It is very important to clean the lens using a clean, lint-free cloth and an eyeglass lens cleaner that is specified as safe for anti-reflective coatings.

NOTE: Garmin recommends that if flying in a region with 8.33 kHz COM channel spacing, the radio should remain in 8.33 kHz mode.This will prevent the loss of stored user and recent frequencies.

NOTE: Do not use outdated database information. Databases used in the system must be updated regularly in order to ensure that the information remains current. Pilots using an outdated database do so entirely at their own risk.

NOTE: All visual depictions contained within this document, including screen images of the GNC 255 bezel and displays, are subject to change and may not reflect the most current GNC 255 software. Depictions of equipment may differ slightly from the actual equipment.

NOTE: This device complies with part 15 of the FCC Rules. Operation is

subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive harm. This notice is being provided in accordance with California’s Proposition 65. If you have any questions or would like additional information, please refer to our web site at www.garmin.com/ prop65.

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Garmin GNC 255A/255B Pilot’s Guide

190-01182-01 Rev. A

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Garmin 255A manual 190-01182-01 Rev. a

Contents

GNC 255A/255B November Limited Warranty 190-01182-01 Rev. a Iii Operation Product Registration and Support US Toll Free Canada Toll FreeRecord of Revisions Contents 2.2 2.12.3 Index Index-1 This page intentionally left blank Getting Started Product DescriptionNav Volume/ID Knob Power/Com Volume/Squelch KnobPilot Controls Tuning LARGE/SMALL Concentric Cursor Knobs FLIP/FLOP Key5 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 Description After making a selection, press ENTCom Database Look-Up Frequency Database Reverse Look-UpStuck Mic Emergency ChannelRemote Frequency Selection Control Selecting a Nav Frequency Nav RadioSaving a Nav Channel Listening to the Nav Audio Channel 01-36OBS Mode 14 CDI DisplayDistance/Speed/Time DST Display 15 DST Data DisplayThis page intentionally left blank Functions Functions DescriptionRecent Com Frequencies Com FrequenciesTurn the Small knob to select an Entry Com User Frequencies Press the CLR key to delete this User frequencyEditing a Com User Frequency Frequencies. Press ENTCom Database Frequencies Com Database FrequenciesCom Nearest Airports APT Nearest APT function. Then, press ENTCom Nearest Area Control Center ACC Frequencies Turn Small Knob To Scroll Through Available FrequenciesCom Nearest Flight Service Station FSS Frequencies 13 Com Nearest FSS FrequenciesCom Nearest Weather WX Frequencies 14 Com Nearest Weather FrequenciesNav Frequencies Recent Nav FrequenciesNav User Frequencies Press the ENT key to delete the displayed frequencyEditing a Nav User Frequency Nav Database Frequencies 21 Nav Database FrequenciesWhen duplicate identifiers are found, press ENT Nav Nearest VORICS Configuration Adjust IntercomTurn the Small knob to display the available VORs Functions displayAux Audio Turn the Small knob to turn the Aux Audio On or OffIntercom On/Off Speaker On/OffIntercom On/Off function. Then, press the ENT key Speaker On/Off function. Then, press ENTSystem Configuration Com SpacingDisplay Brightness 34 Set Display BrightnessDisplay Contrast Database InfoDisplay Contrast function. Then, press the ENT key Database Version function. Then, press the ENT keyLoad Database Load Database function. Then, press the ENT keySoftware Version Serial NumberSoftware 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 Setting Up the Count Up Timer Viewing Timers in the Com DisplayPressing 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 Troubleshooting AppendixIt can be enabled Or disabled via a Remote mountedIf in Lock Out mode Calibration error Recalibrate resolverUpdating the Frequency Database Messages Power has been Re-apply power to the unit Switch has beenVerify glideslope deviation Property withAll installations 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