Garmin 255A manual 2.1, 2.2, 2.3

3	Functions	..............................................................................................	3-1
3.1	Functions Description		3-1
3.2	Com Frequencies		3-2
	3.2.1	Recent Com Frequencies	3-2
	3.2.2	Com User Frequencies	3-3
	3.2.2.1	Viewing the Com User Frequency	3-3
	3.2.2.2	Deleting the Com User Frequency	3-3
	3.2.2.3	Editing a Com User Frequency	3-4
	3.2.3	Com Database Frequencies	3-5
	3.2.4	Com Nearest Airports (APT)	3-6
	3.2.5	Com Nearest Area Control Center (ACC) Frequencies	3-7
	3.2.6	Com Nearest Flight Service Station (FSS) Frequencies	3-8
	3.2.7	Com Nearest Weather (WX) Frequencies	3-9
3.3	Nav Frequencies		3-10
	3.3.1	Recent Nav Frequencies	3-10
	3.3.2	Nav User Frequencies	3-11
	3.3.2.1	Viewing the Nav User Frequency	3-11
	3.3.2.2	Deleting the Nav User Frequency	3-11
	3.3.2.3	Editing a Nav User Frequency	3-12
	3.3.3	Nav Database Frequencies	3-13
	3.3.4	Nav Nearest VOR	3-14
3.4	ICS Configuration		3-15
	3.4.1	Adjust Intercom	3-15
	3.4.2	Aux Audio	3-16
	3.4.3	Intercom On/Off	3-17
	3.4.4	Speaker On/Off	3-17
3.5	System Configuration		3-18
	3.5.1	Com Spacing	3-18
	3.5.2	Display Brightness	3-19
	3.5.3	Display Contrast	3-20
	3.5.4	Database Info	3-20
	3.5.5	Load Database	3-21
	3.5.6	Software Version	3-22
	3.5.7	Serial Number	3-22
3.6	Timers		3-23
	3.6.1	Setting Up the Count Down Timer	3-23
	3.6.2	Setting Up the Count Up Timer	3-24

viii Garmin GNC 255A/255B Pilot’s Guide 190-01182-01 Rev. A