OBS Mode, CDI Display | Garmin 255A guide

2.4OBS Mode

If your system is configured with an external CDI/HSI, the OBS radial of your remote display will be decoded and displayed on the screen of the GNC 255.

NOTE: The Identifier is the decoded Nav Identifier from the Morse code broadcast by the station.

1.Press the OBS key to see the current OBS setting and graphic CDI.

2.Use the LARGE and SMALL knobs to change the displayed OBS values.

The GNC 255 graphic CDI is shown as a graph of five dots right or left of the triangle icon. Each dot indicates two degrees deflection with ten degrees full deflection to each side. Fly towards the bar to be on-course.

Active Nav

Frequency

Identifier

OBS Setting

To/From Indication for

Selected Station

Reference Com

Frequency

CDI Deflection

Figure 2-14 CDI Display

2-8

Garmin GNC 255A/255B Pilot’s Guide

190-01182-01 Rev. A

Image 24

Garmin 255A manual OBS Mode, CDI Display

Contents

GNC 255A/255B November Limited Warranty 190-01182-01 Rev. a Iii Operation Product Registration and Support US Toll Free Canada Toll Free Record of Revisions Contents 2.1 2.22.3 Index Index-1 This page intentionally left blank Getting Started Product Description Power/Com Volume/Squelch Knob Nav Volume/ID KnobPilot Controls Tuning LARGE/SMALL Concentric Cursor Knobs FLIP/FLOP Key5 C/N Com/Nav Key OBS Key USB Port Func Function KeyMON Monitor Key Power On Com RadioSelecting a Com Frequency Monitoring the Standby Com Channel Saving a Com ChannelAfter selecting the desired characters, press ENT Description After making a selection, press ENT Com Database Look-Up Frequency Database Reverse Look-Up Emergency Channel Stuck MicRemote Frequency Selection Control Nav Radio Selecting a Nav FrequencySaving a Nav Channel Listening to the Nav Audio Channel 01-36 OBS Mode 14 CDI Display Distance/Speed/Time DST Display 15 DST Data Display This page intentionally left blank Functions Functions Description Com Frequencies Recent Com FrequenciesTurn the Small knob to select an Entry Com User Frequencies Press the CLR key to delete this User frequency Editing a Com User Frequency Frequencies. Press ENT Com Database Frequencies Com Database Frequencies Com Nearest Airports APT Nearest APT function. Then, press ENT Com Nearest Area Control Center ACC Frequencies Turn Small Knob To Scroll Through Available Frequencies Com Nearest Flight Service Station FSS Frequencies 13 Com Nearest FSS Frequencies Com Nearest Weather WX Frequencies 14 Com Nearest Weather Frequencies Nav Frequencies Recent Nav Frequencies Nav User Frequencies Press the ENT key to delete the displayed frequency Editing a Nav User Frequency Nav Database Frequencies 21 Nav Database Frequencies When duplicate identifiers are found, press ENT Nav Nearest VOR ICS Configuration Adjust IntercomTurn the Small knob to display the available VORs Functions display Aux Audio Turn the Small knob to turn the Aux Audio On or Off Intercom On/Off Speaker On/OffIntercom On/Off function. Then, press the ENT key Speaker On/Off function. Then, press ENT System Configuration Com Spacing Display Brightness 34 Set Display Brightness Display Contrast Database InfoDisplay Contrast function. Then, press the ENT key Database Version function. Then, press the ENT key Load Database Load Database function. Then, press the ENT key Software Version Serial NumberSoftware Version function. Then, press the ENT key Press the Func key to return to the main menu Timers Setting Up the Count Down TimerTo 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 Timer 48 Count Down Timer Value Now Counting Up This page intentionally left blank Troubleshooting Appendix It can be enabled Or disabled via a Remote mountedIf in Lock Out mode Calibration error Recalibrate resolver Updating the Frequency Database Messages Power has been Re-apply power to the unit Switch has beenVerify glideslope deviation Property with All installations InstallationsRemote com Been in pressed Nav radio is Contact dealer for service Not communicatingProperty with System This page intentionally left blank Index Remote frequency control 2-5 Reverse look-up 2-4 Revisions