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Garmin GNC 255 GNC255A/255B Pilot's Guide - Page 36

Nav Frequencies

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3.3 Nav Frequencies The Nav Frequencies category in the Functions section contains remotely acquired frequencies (Remote), recently used frequencies (Recent), user-defined frequencies (User), and a database of all frequencies provided in the standard default memory (Database). 3.3.1 Recent Nav Frequencies The last 20 Nav frequencies used are kept in the list of Recent Nav Frequencies and can be accessed in this function. 1. Press FUNC to access the Functions. Turn the LARGE knob to select the Nav Frequency Function. Turn the SMALL knob to view the Recent frequency function. Then, press ENT. Press ENT Key To Set Selected Freq As Standby Active Frequency Position In List. Turn SMALL Knob To Select Entry. Press FLIP/FLOP Key To Set Selected Freq As Active Selected Frequency Figure 3-15 Recent Nav Frequencies 2. Turn the SMALL knob to select an Entry (1-20). If a GPS position is available, the area below frequency will show the nearest facility name/type, if available. 3. Press and release the FLIP/FLOP key to transfer the displayed channel to the Active frequency position or press the ENT key to transfer the displayed channel to the Standby frequency position. 3-10 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A

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