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Garmin GTR 225 GTR 255/255A/255B Pilot’s Guide - Page 37

A Count Up Timer will continue counting separately.

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When the Count Down Timer reaches 0:00, it will continue counting as a Count Up value. The Count Down Timer that is counting up will be highlighted. A Count Up Timer will continue counting separately. Count Down Timer Value Highlighted When Counting Up Figure 3-36 Count Down Timer Value Now Counting Up 190-01182-00 Rev. A Garmin GTR 225/225A/225B Pilot's Guide 3-19

Section	Page
Product Registration and Support	6
1 Getting Started	9
1.1 Product Description	9
1.2 Pilot Controls	10
1.2.1 Power/Com Volume/Squelch Knob	10
1.2.2 Tuning LARGE/SMALL Concentric (Cursor) Knobs	11
1.2.3 FLIP/FLOP Key	11
1.2.4 Com Key	11
1.2.5 MEM Key	11
1.2.6 ICS Key	11
1.2.7 CLR (Clear) Key	11
1.2.8 ENT (Enter) Key	11
1.2.9 FUNC (Function) Key	12
1.2.10 MON (Monitor) Key	12
1.3 USB Port	12
2 Basic Operation	13
2.1 Power On	13
2.2 Com Radio	13
2.2.1 Selecting a Com Frequency	13
2.2.2 Monitoring the Standby Com Channel	14
2.2.3 Saving a Com Channel	14
2.2.4 Com Database Look-Up	16
2.2.5 Emergency Channel	16
2.2.6 Stuck Mic	17
2.2.7 Frequency Database Reverse Look-Up	17
2.2.8 Remote Frequency Selection Control	17
3 Functions	19
3.1 Functions Description	19
3.2 Com Frequencies	20
3.2.1 Recent Com Frequencies	20
3.2.2 Com User Frequencies	21
3.2.2.1 Viewing the Com User Frequency	21
3.2.2.2 Deleting the Com User Frequency	21
3.2.2.3 Editing a Com User Frequency	22
3.2.3 Com Database Frequencies	23
3.2.4 Com Nearest Airports (APT)	24
3.2.5 Com Nearest Area Control Center (ACC) Frequencies	24
3.2.6 Com Nearest Flight Service Station (FSS) Frequencies	25
3.2.7 Com Nearest Weather (WX) Frequencies	26
3.3 ICS Configuration	27
3.3.1 Adjust Intercom	27
3.3.2 Aux Audio	28
3.3.3 Intercom On/Off	29
3.3.4 Speaker On/Off	29
3.4 System Configuration	30
3.4.1 Com Spacing	30
3.4.2 Display Brightness	31
3.4.3 Display Contrast	32
3.4.4 Database Info	32
3.4.5 Load Database	33
3.4.6 Software Version	34
3.4.7 Serial Number	34
3.5 Timers	35
3.5.1 Setting Up the Count Down Timer	35
3.5.2 Setting Up the Count Up Timer	36
3.5.3 Viewing Timers in the Com Display	36
4 Appendix	39
4.1 Troubleshooting	39
4.2 Updating the Frequency Database	41
4.2.1 Downloading the Frequency Database	41
4.2.2 Updating the GTR 225 Frequency Database	41
4.3 Messages	42