Emergency Channel, Stuck Mic | Garmin 255A instruction

2.2.6Emergency Channel

1.Press and hold the FLIP/FLOP key or the Com Remote Transfer (COM RMT XFR) key for approximately two seconds.

Figure 2-9 Emergency Channel

2.The Emergency Channel will be inserted into the Active Frequency position and the previous Active Frequency will become the Standby Frequency.

NOTE: Pressing and holding the Com Remote Transfer (COM RMT XFR) key for approximately two seconds, on units so configured, will lock the COM board, preventing further changes in Com frequency until the Com board is unlocked, by pressing the Com Remote Transfer key again for two seconds. The following message will notify the pilot that the Com board has been locked: “COM LOCKED TO 121.5 MHZ. HOLD REMOTE COM TRANSFER KEY TO EXIT.”

NOTE: Under some circumstances if the Com system loses communication with the main system, the radio will automatically tune to 121.50 MHz for transmit and receive regardless of the displayed frequency.

2.2.7Stuck Mic

The GNC 255 helps protect you from a situation where the microphone may get stuck in the ON or Transmit position. If the microphone is keyed for longer than 35 seconds, the GNC 255 will return to the receive mode on the selected frequency.

A “Stuck Mic” message will display until the transmit key is released. Alerts will display until the error clears or the user acknowledges it.

2.2.8Remote Frequency Selection Control

On units configured for remote Com frequency Recall, pressing the remote recall switch will load the next preset Com frequency into the unit’s Standby frequency box. The remote recall switch can be pressed multiple times to scroll the entire preset frequency list through the Standby frequency box (the list will “wrap” from the bottom of the list back up to the top, skipping any empty preset positions).

The standby frequency isn’t activated until a Com FLIP/FLOP switch (either bezel-mounted or remote (COM RMT XFR) is pressed. Remote Frequency Selection only functions on units configured for a remote Com Frequency recall switch.

190-01182-01 Rev. A

Garmin GNC 255A/255B Pilot’s Guide

2-5

Image 21

Garmin 255A manual Emergency Channel, Stuck Mic, Remote Frequency Selection Control

Contents

GNC 255A/255B November Limited Warranty 190-01182-01 Rev. a Iii Operation US Toll Free Canada Toll Free Product Registration and Support Record of Revisions Contents 2.1 2.22.3 Index Index-1 This page intentionally left blank Product Description Getting Started Power/Com Volume/Squelch Knob Nav Volume/ID KnobPilot Controls FLIP/FLOP Key Tuning LARGE/SMALL Concentric Cursor Knobs5 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 After making a selection, press ENT Description Frequency Database Reverse Look-Up Com Database Look-Up Emergency Channel Stuck MicRemote Frequency Selection Control Nav Radio Selecting a Nav FrequencySaving a Nav Channel 01-36 Listening to the Nav Audio Channel 14 CDI Display OBS Mode 15 DST Data Display Distance/Speed/Time DST Display This page intentionally left blank Functions Description Functions Com Frequencies Recent Com FrequenciesTurn the Small knob to select an Entry Press the CLR key to delete this User frequency Com User Frequencies Frequencies. Press ENT Editing a Com User Frequency Com Database Frequencies Com Database Frequencies Nearest APT function. Then, press ENT Com Nearest Airports APT Turn Small Knob To Scroll Through Available Frequencies Com Nearest Area Control Center ACC Frequencies 13 Com Nearest FSS Frequencies Com Nearest Flight Service Station FSS Frequencies 14 Com Nearest Weather Frequencies Com Nearest Weather WX Frequencies Recent Nav Frequencies Nav Frequencies Press the ENT key to delete the displayed frequency Nav User Frequencies Editing a Nav User Frequency 21 Nav Database Frequencies Nav Database Frequencies Nav Nearest VOR When duplicate identifiers are found, press ENT Adjust Intercom ICS ConfigurationTurn the Small knob to display the available VORs Functions display Turn the Small knob to turn the Aux Audio On or Off Aux Audio Speaker On/Off Intercom On/OffIntercom On/Off function. Then, press the ENT key Speaker On/Off function. Then, press ENT Com Spacing System Configuration 34 Set Display Brightness Display Brightness Database Info Display ContrastDisplay Contrast function. Then, press the ENT key Database Version function. Then, press the ENT key Load Database function. Then, press the ENT key Load Database Serial Number Software VersionSoftware 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 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 Timer 48 Count Down Timer Value Now Counting Up This page intentionally left blank Appendix Troubleshooting Or disabled via a Remote mounted It can be enabledIf in Lock Out mode Calibration error Recalibrate resolver Updating the Frequency Database Messages Switch has been Power has been Re-apply power to the unitVerify glideslope deviation Property with Installations All 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