Garmin GNC 255 GNC255A/255B Pilot's Guide - Page 13

1-1

190-01182-01

Rev. A

Garmin GNC 255A/255B Pilot’s Guide

1

GETTING STARTED

1.1

Product Description

Combining a powerful VHF communications transceiver with 200 channel

VOR, Localizer and Glideslope receivers, the GNC 255 provides a full-functioned

navigation and communications solution in a small footprint at a very affordable

price. Besides traditional Nav/Com features, the GNC 255 also incorporates

workload-reducing functions such as automatic decoding of the Morse code

station identiﬁer for VOR/LOC, most-used frequency storage in memory, built-

in course deviation indicator, and more.

The GNC 255 has the ability to monitor the standby Com frequencies. The

GNC 255’s Com radio operates in the aviation voice band, from 118.000 to

136.975 MHz, in 25 kHz steps (default). For European operations, a Com

radio conﬁguration of 8.33 kHz steps is also available. The GNC 255 VHF Nav

receiver operates from 108 MHz to 117.95 MHz decoding both the VHF Omni

Range and Localizer navigation signals. The built-in Glideslope receiver will

automatically tune the corresponding glideslope paired frequencies (328 MHz

to 335 MHz) when the localizer is tuned. The GNC 255 is available in 10 and 16

watt com transmitter versions. The GNC 255A is available with a 10 watt com

transmitter. The GNC 255B is available with a 16 watt com transmitter.

Power On/Off,

Com Volume,

Squelch On/Off

Photo Sensor

USB Port

Locking

Screw

Nav (VLOC)

Volume, Nav ID

On/Off

LARGE and

SMALL Knobs

(Frequency

Adjust)

Frequency

Monitor Key

Frequency Transfer

(FLIP/FLOP) Key

Com or Nav

Frequency Selection

OBS Selection

To/From Selection

Enter Key

Clear Data Key

Function Selection

Figure 1-1

GNC 255 Front Panel Description

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

Garmin GNC 255 GNC255A/255B Pilot's Guide - Page 13

Getting Started - gnc 255a price

Page 13 highlights