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Garmin GNC 255 GNC255A/255B Pilot's Guide - Page 39

Nav Database Frequencies

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3.3.3 Nav Database Frequencies The GNC 255 contains a large database of Nav frequencies that may be recalled by identifier. 1. Press FUNC to access the Functions. With the Nav Frequency Function highlighted, turn the SMALL knob to view the Nav Database function. Then, press ENT. 2. Turn the LARGE knob to move the cursor to highlight a character. 3. Turn the SMALL knob to select the desired character. Press the ENT Key to Save Press the CLR Key To Return the Displayed Value to the Previous Menu Turn SMALL Knob To Select Character Turn LARGE Knob To Move Cursor Figure 3-21 Nav Database Frequencies 4. Repeat steps 2 and 3 to complete the desired identifier and then press the ENT key. 5. If available, the Frequency Type will be highlighted. Turn the SMALL knob to select the desired frequency. Press ENT Key To Set Selected Freq As Standby Selected Frequency Press FLIP/FLOP Key To Set Selected Identifier Selected Freq As Active Wpt Type Figure 3-22 Selected Nav Database Frequency 6. Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 7. Press the ENT key to set the selected frequency as the Standby frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-13

Section	Page
Product Registration and Support	7
1 Getting Started	13
1.1 Product Description	13
1.2 Pilot Controls	14
1.2.1 Power/Com Volume/Squelch Knob	14
1.2.2 Nav Volume/ID Knob	14
1.2.3 Tuning LARGE/SMALL Concentric (Cursor) Knobs	15
1.2.4 FLIP/FLOP Key	15
1.2.5 C/N (Com/Nav) Key	15
1.2.6 OBS Key	15
1.2.7 T/F (To/From) Key	15
1.2.8 CLR (Clear) Key	15
1.2.9 ENT (Enter) Key	15
1.2.10 FUNC (Function) Key	16
1.2.11 MON (Monitor) Key	16
1.3 USB Port	16
2 Basic Operation	17
2.1 Power On	17
2.2 Com Radio	17
2.2.1 Selecting a Com Frequency	17
2.2.2 Monitoring the Standby Com Channel	18
2.2.3 Saving a Com Channel	18
2.2.4 Com Database Look-Up	20
2.2.5 Frequency Database Reverse Look-Up	20
2.2.6 Emergency Channel	21
2.2.7 Stuck Mic	21
2.2.8 Remote Frequency Selection Control	21
2.3 Nav Radio	22
2.3.1 Selecting a Nav Frequency	22
2.3.2 Saving a Nav Channel	22
2.3.3 Listening to the Nav Audio Channel	23
2.4 OBS Mode	24
2.5 Distance/Speed/Time (DST) Display	25
3 Functions	27
3.1 Functions Description	27
3.2 Com Frequencies	28
3.2.1 Recent Com Frequencies	28
3.2.2 Com User Frequencies	29
3.2.2.1 Viewing the Com User Frequency	29
3.2.2.2 Deleting the Com User Frequency	29
3.2.2.3 Editing a Com User Frequency	30
3.2.3 Com Database Frequencies	31
3.2.4 Com Nearest Airports (APT)	32
3.2.5 Com Nearest Area Control Center (ACC) Frequencies	33
3.2.6 Com Nearest Flight Service Station (FSS) Frequencies	34
3.2.7 Com Nearest Weather (WX) Frequencies	35
3.3 Nav Frequencies	36
3.3.1 Recent Nav Frequencies	36
3.3.2 Nav User Frequencies	37
3.3.2.1 Viewing the Nav User Frequency	37
3.3.2.2 Deleting the Nav User Frequency	37
3.3.2.3 Editing a Nav User Frequency	38
3.3.3 Nav Database Frequencies	39
3.3.4 Nav Nearest VOR	40
3.4 ICS Configuration	41
3.4.1 Adjust Intercom	41
3.4.2 Aux Audio	42
3.4.3 Intercom On/Off	43
3.4.4 Speaker On/Off	43
3.5 System Configuration	44
3.5.1 Com Spacing	44
3.5.2 Display Brightness	45
3.5.3 Display Contrast	46
3.5.4 Database Info	46
3.5.5 Load Database	47
3.5.6 Software Version	48
3.5.7 Serial Number	48
3.6 Timers	49
3.6.1 Setting Up the Count Down Timer	49
3.6.2 Setting Up the Count Up Timer	50
3.6.3 Viewing Timers in the Com Display	50
4 Appendix	53
4.1 Troubleshooting	53
4.2 Updating the Frequency Database	55
4.2.1 Downloading the Frequency Database	55
4.2.2 Updating the GNC 255 Frequency Database	55
4.3 Messages	56