GNC255A/255B Pilot's Guide
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...Rev. If you have any user-serviceable parts. WARNING: For safety reasons, GNC 255 operational procedures must be updated regularly in order to ensure that the information remains current. CAUTION: The Garmin GNC 255 does not contain any questions or would like additional information, please refer to... cause cancer, birth defects, or reproductive harm. Depictions of the GNC 255 bezel and displays, are subject to change and may...
...Rev. If you have any user-serviceable parts. WARNING: For safety reasons, GNC 255 operational procedures must be updated regularly in order to ensure that the information remains current. CAUTION: The Garmin GNC 255 does not contain any questions or would like additional information, please refer to... cause cancer, birth defects, or reproductive harm. Depictions of the GNC 255 bezel and displays, are subject to change and may...
GNC255A/255B Pilot's Guide
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3.6.3 Viewing Timers in the Com Display 3-24 4 Appendix 4-1 4.1 Troubleshooting 4-1 4.2 Updating the Frequency Database 4-3 4.2.1 Downloading the Frequency Database 4-3 4.2.2 Updating the GNC 255 Frequency Database 4-3 4.3 Messages 4-4 Index...Index-1 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide ix
3.6.3 Viewing Timers in the Com Display 3-24 4 Appendix 4-1 4.1 Troubleshooting 4-1 4.2 Updating the Frequency Database 4-3 4.2.1 Downloading the Frequency Database 4-3 4.2.2 Updating the GNC 255 Frequency Database 4-3 4.3 Messages 4-4 Index...Index-1 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide ix
GNC255A/255B Pilot's Guide
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... VOR/LOC, most-used frequency storage in a small footprint at a very affordable price. The GNC 255A is available with a 16 watt com transmitter. The GNC 255B is tuned. A Garmin GNC 255A/255B Pilot's Guide 1-1 The GNC 255 is also available. The GNC 255 has the ability to 335 MHz) when the localizer is available with a 10 watt com...
... VOR/LOC, most-used frequency storage in a small footprint at a very affordable price. The GNC 255A is available with a 16 watt com transmitter. The GNC 255B is tuned. A Garmin GNC 255A/255B Pilot's Guide 1-1 The GNC 255 is also available. The GNC 255 has the ability to 335 MHz) when the localizer is available with a 10 watt com...
GNC255A/255B Pilot's Guide
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1.2 Pilot Controls The GNC 255 controls have been designed to simplify operation of the bezel controls audio volume for the Com radio. When the Com radio is active, press the ..., and bezel keys. 1.2.1 Power/Com Volume/Squelch Knob The Power/Com Volume/Squelch knob located in the bottom left corner of the Nav active frequency. 1-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Press the Nav Volume/ID knob and the Morse code tones will appear to the left of...
1.2 Pilot Controls The GNC 255 controls have been designed to simplify operation of the bezel controls audio volume for the Com radio. When the Com radio is active, press the ..., and bezel keys. 1.2.1 Power/Com Volume/Squelch Knob The Power/Com Volume/Squelch knob located in the bottom left corner of the Nav active frequency. 1-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Press the Nav Volume/ID knob and the Morse code tones will appear to the left of...
GNC255A/255B Pilot's Guide
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... frequency may be monitored while still listening to the Active frequency. 1.3 USB Port The USB port is used to update the frequency database in the GNC 255. NOTE: Garmin recommends the use of a USB 2.0 compatible USB flash drive for the following: the Com Radio, Nav Radio, ICS Configuration, System Configuration, and Timer. 1.2.10...
... frequency may be monitored while still listening to the Active frequency. 1.3 USB Port The USB port is used to update the frequency database in the GNC 255. NOTE: Garmin recommends the use of a USB 2.0 compatible USB flash drive for the following: the Com Radio, Nav Radio, ICS Configuration, System Configuration, and Timer. 1.2.10...
GNC255A/255B Pilot's Guide
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...types will have an asterisk next to the identifier. The kHz selection range is between 118 and 136 in 25 kHz or 8.33 kHz increments. A Garmin GNC 255A/255B Pilot's Guide 2-1 Turn the LARGE knob to change the values in one MHz increments. Frequencies with the FLIP/FLOP key. Identifier and ...6. Press and release the FLIP/FLOP key to toggle the Standby frequency to reach the Com radio function. 2 BASIC OPERATION 2.1 Power On Turn the GNC 255 on by either turning the Power/Com Volume/ Squelch knob clockwise to turn the power on or, if installed, turning on the top line of...
...types will have an asterisk next to the identifier. The kHz selection range is between 118 and 136 in 25 kHz or 8.33 kHz increments. A Garmin GNC 255A/255B Pilot's Guide 2-1 Turn the LARGE knob to change the values in one MHz increments. Frequencies with the FLIP/FLOP key. Identifier and ...6. Press and release the FLIP/FLOP key to toggle the Standby frequency to reach the Com radio function. 2 BASIC OPERATION 2.1 Power On Turn the GNC 255 on by either turning the Power/Com Volume/ Squelch knob clockwise to turn the power on or, if installed, turning on the top line of...
GNC255A/255B Pilot's Guide
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... list back up to the receive mode on units configured for longer than 35 seconds, the GNC 255 will "wrap" from the bottom of the displayed frequency. 2.2.7 Stuck Mic The GNC 255 helps protect you from a situation where the microphone may get stuck in Com frequency until a...Frequency. The standby frequency isn't activated until the Com board is keyed for a remote Com Frequency recall switch. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 2-5 The following message will display until the transmit key is pressed. 2.2.6 Emergency Channel 1. Press and hold the ...
... list back up to the receive mode on units configured for longer than 35 seconds, the GNC 255 will "wrap" from the bottom of the displayed frequency. 2.2.7 Stuck Mic The GNC 255 helps protect you from a situation where the microphone may get stuck in Com frequency until a...Frequency. The standby frequency isn't activated until the Com board is keyed for a remote Com Frequency recall switch. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 2-5 The following message will display until the transmit key is pressed. 2.2.6 Emergency Channel 1. Press and hold the ...
GNC255A/255B Pilot's Guide
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... be decoded and displayed on -course. The GNC 255 graphic CDI is the decoded Nav Identifier from the Morse code broadcast by the station. 1. Active Nav Frequency Identifier Reference Com Frequency OBS Setting To/From Indication for Selected Station CDI Deflection Figure 2-14 CDI Display 2-8 Garmin GNC 255A/255B Pilot's Guide 190-01182-01...
... be decoded and displayed on -course. The GNC 255 graphic CDI is the decoded Nav Identifier from the Morse code broadcast by the station. 1. Active Nav Frequency Identifier Reference Com Frequency OBS Setting To/From Indication for Selected Station CDI Deflection Figure 2-14 CDI Display 2-8 Garmin GNC 255A/255B Pilot's Guide 190-01182-01...
GNC255A/255B Pilot's Guide
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... dashes are not connected to an external sensor, you will be displayed, press the T/F key to prompt the GNC to be available. A Garmin GNC 255A/255B Pilot's Guide 2-9 If you are displayed when distance/speed/time data is not shown, pressing the T/F key will show DST data in... the lower part of the display. 2.5 Distance/Speed/Time (DST) Display When the GNC 255 has received data from an external device, such as a GPS...
... dashes are not connected to an external sensor, you will be displayed, press the T/F key to prompt the GNC to be available. A Garmin GNC 255A/255B Pilot's Guide 2-9 If you are displayed when distance/speed/time data is not shown, pressing the T/F key will show DST data in... the lower part of the display. 2.5 Distance/Speed/Time (DST) Display When the GNC 255 has received data from an external device, such as a GPS...
GNC255A/255B Pilot's Guide
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... the FLIP/FLOP key to set the selected frequency as the Standby frequency. 190-01182-01 Rev. 3.2.3 Com Database Frequencies The GNC 255 contains a large database of Com frequencies that may be highlighted. Turn SMALL Knob To Select Character Turn LARGE Knob To Move Cursor... Frequencies 1. Press FUNC to view the Com Database function. Press the ENT key to set the selected frequency as the Active frequency. 7. A Garmin GNC 255A/255B Pilot's Guide 3-5 With the Com Frequency Function highlighted, turn the SMALL knob to access the Functions. Then, press ENT. 2. Repeat...
... the FLIP/FLOP key to set the selected frequency as the Standby frequency. 190-01182-01 Rev. 3.2.3 Com Database Frequencies The GNC 255 contains a large database of Com frequencies that may be highlighted. Turn SMALL Knob To Select Character Turn LARGE Knob To Move Cursor... Frequencies 1. Press FUNC to view the Com Database function. Press the ENT key to set the selected frequency as the Active frequency. 7. A Garmin GNC 255A/255B Pilot's Guide 3-5 With the Com Frequency Function highlighted, turn the SMALL knob to access the Functions. Then, press ENT. 2. Repeat...
GNC255A/255B Pilot's Guide
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Or, press the CLR key to return to access the Functions. Press FUNC to the Functions display. 3-6 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Turn the SMALL knob to select the displayed airport. Turn SMALL Knob To Scroll Through Available Airports ... knob to set it as the Active frequency. Turn the SMALL knob to display the available airports. Then, press ENT. 2. 3.2.4 Com Nearest Airports (APT) The GNC 255 will be highlighted.
Or, press the CLR key to return to access the Functions. Press FUNC to the Functions display. 3-6 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Turn the SMALL knob to select the displayed airport. Turn SMALL Knob To Scroll Through Available Airports ... knob to set it as the Active frequency. Turn the SMALL knob to display the available airports. Then, press ENT. 2. 3.2.4 Com Nearest Airports (APT) The GNC 255 will be highlighted.
GNC255A/255B Pilot's Guide
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...Available Frequencies Figure 3-12 Com Nearest ACC Frequencies 1. Press and release the FLIP/FLOP key to insert the highlighted frequency as the Standby frequency. A Garmin GNC 255A/255B Pilot's Guide 3-7 Or, press the CLR key to return to display the available ACCs. 3. ACCs are also known as the Active frequency... ENT key to set the selected frequency as Air Route Traffic Control Centers (ARTCC). 3.2.5 Com Nearest Area Control Center (ACC) Frequencies The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Area Control Center (ACC) frequencies.
...Available Frequencies Figure 3-12 Com Nearest ACC Frequencies 1. Press and release the FLIP/FLOP key to insert the highlighted frequency as the Standby frequency. A Garmin GNC 255A/255B Pilot's Guide 3-7 Or, press the CLR key to return to display the available ACCs. 3. ACCs are also known as the Active frequency... ENT key to set the selected frequency as Air Route Traffic Control Centers (ARTCC). 3.2.5 Com Nearest Area Control Center (ACC) Frequencies The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Area Control Center (ACC) frequencies.
GNC255A/255B Pilot's Guide
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...display the available FSS frequencies. 3. Press and release the FLIP/FLOP key to insert the highlighted frequency as the Active frequency. 3-8 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Turn SMALL Knob To Scroll Through Available Frequencies Figure 3-13 Com Nearest FSS Frequencies...the SMALL knob to view the Com Nearest FSS function. Then, press ENT. 2. 3.2.6 Com Nearest Flight Service Station (FSS) Frequencies The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Flight Service Station (FSS) frequencies. Press FUNC to the Functions display....
...display the available FSS frequencies. 3. Press and release the FLIP/FLOP key to insert the highlighted frequency as the Active frequency. 3-8 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Turn SMALL Knob To Scroll Through Available Frequencies Figure 3-13 Com Nearest FSS Frequencies...the SMALL knob to view the Com Nearest FSS function. Then, press ENT. 2. 3.2.6 Com Nearest Flight Service Station (FSS) Frequencies The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Flight Service Station (FSS) frequencies. Press FUNC to the Functions display....
GNC255A/255B Pilot's Guide
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..., press ENT. 2. Or, press the CLR key to return to display the available Weather frequencies. 3. Turn the SMALL knob to the Functions display. 4. A Garmin GNC 255A/255B Pilot's Guide 3-9 Press and release the FLIP/FLOP key to insert the highlighted frequency as the Active frequency. 190-01182-01 Rev. Press... Standby frequency. With the Com Frequency Function highlighted, turn the SMALL knob to access the Functions. 3.2.7 Com Nearest Weather (WX) Frequencies The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Weather (WX) frequencies.
..., press ENT. 2. Or, press the CLR key to return to display the available Weather frequencies. 3. Turn the SMALL knob to the Functions display. 4. A Garmin GNC 255A/255B Pilot's Guide 3-9 Press and release the FLIP/FLOP key to insert the highlighted frequency as the Active frequency. 190-01182-01 Rev. Press... Standby frequency. With the Com Frequency Function highlighted, turn the SMALL knob to access the Functions. 3.2.7 Com Nearest Weather (WX) Frequencies The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Weather (WX) frequencies.
GNC255A/255B Pilot's Guide
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3.3.3 Nav Database Frequencies The GNC 255 contains a large database of Nav frequencies that may be highlighted. Press FUNC to highlight a character. 3. If available, the Frequency Type will be recalled by identifier. 1. .... Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 7. Press the ENT key to select the desired frequency. A Garmin GNC 255A/255B Pilot's Guide 3-13
3.3.3 Nav Database Frequencies The GNC 255 contains a large database of Nav frequencies that may be highlighted. Press FUNC to highlight a character. 3. If available, the Frequency Type will be recalled by identifier. 1. .... Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 7. Press the ENT key to select the desired frequency. A Garmin GNC 255A/255B Pilot's Guide 3-13
GNC255A/255B Pilot's Guide
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... ENT and continue as Active or Standby 3.3.4 Nav Nearest VOR The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest VORs. Turn the SMALL knob to view the Nav Nearest VOR function. Then, press ENT. 3-14 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Set the selected...
... ENT and continue as Active or Standby 3.3.4 Nav Nearest VOR The GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest VORs. Turn the SMALL knob to view the Nav Nearest VOR function. Then, press ENT. 3-14 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Set the selected...
GNC255A/255B Pilot's Guide
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... and is not selectable by using the SMALL knob to view the Display Brightness function. Then, press the ENT key. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-19 Turn the SMALL knob to access the Functions. The range can be adjusted by the pilot. 1. This is set ... for this function. Turn the SMALL knob to adjust the value. 3.5.2 Display Brightness As it arrives from the "normal" or zero position. The GNC 255 will either control dimming based on the display is available for controlling the brightness level of the adjustment range are: -10 (Low Display Intensity) and...
... and is not selectable by using the SMALL knob to view the Display Brightness function. Then, press the ENT key. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-19 Turn the SMALL knob to access the Functions. The range can be adjusted by the pilot. 1. This is set ... for this function. Turn the SMALL knob to adjust the value. 3.5.2 Display Brightness As it arrives from the "normal" or zero position. The GNC 255 will either control dimming based on the display is available for controlling the brightness level of the adjustment range are: -10 (Low Display Intensity) and...
GNC255A/255B Pilot's Guide
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... adjusted by using the SMALL knob to access the Functions. Press FUNC to adjust the value. 1. Turn the SMALL knob to the main display. 3-20 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. This information is displayed. Press the FUNC key to return to view the Database Version function. Press... -50 (Low Display Contrast) and 50 (High Display Contrast) with 0 as the default. Then, press the ENT key. 3.5.4 Database Info The Database information for the GNC 255 unit is useful when contacting Customer Support. 1.
... adjusted by using the SMALL knob to access the Functions. Press FUNC to adjust the value. 1. Turn the SMALL knob to the main display. 3-20 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. This information is displayed. Press the FUNC key to return to view the Database Version function. Press... -50 (Low Display Contrast) and 50 (High Display Contrast) with 0 as the default. Then, press the ENT key. 3.5.4 Database Info The Database information for the GNC 255 unit is useful when contacting Customer Support. 1.
GNC255A/255B Pilot's Guide
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.... Verify the database version on the top right corner of a USB 2.0 compatible USB flash drive for easily updating the system databases. A Garmin GNC 255A/255B Pilot's Guide 3-21 Turn the LARGE knob to view the Load Database function. Then, press the ENT key. Updating will begin... automatically. Figure 3-38 Database Update Display 4. NOTE: Garmin recommends the use of the GNC 255. 2. Figure 3-39 Verify Database Version 190-01182-01 Rev. Insert the supplied cable into the other end of the cable. ...
.... Verify the database version on the top right corner of a USB 2.0 compatible USB flash drive for easily updating the system databases. A Garmin GNC 255A/255B Pilot's Guide 3-21 Turn the LARGE knob to view the Load Database function. Then, press the ENT key. Updating will begin... automatically. Figure 3-38 Database Update Display 4. NOTE: Garmin recommends the use of the GNC 255. 2. Figure 3-39 Verify Database Version 190-01182-01 Rev. Insert the supplied cable into the other end of the cable. ...
GNC255A/255B Pilot's Guide
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... 1. Turn the SMALL knob to select the SYS Function. This information is loaded after power-up. 3.5.6 Software Version The software versions of the GNC 255 unit is complete and then remove the memory device and cable. Figure 3-40 Serial Number Display Unit Serial Number ID Is Used With The flyGarmin... the SYS Function. Turn the LARGE knob to the main menu. 3-22 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Turn the SMALL knob to the main menu. 3.5.7 Serial Number The serial number of the GNC 255 unit are displayed. 5. Press the FUNC key to return to view the ...
... 1. Turn the SMALL knob to select the SYS Function. This information is loaded after power-up. 3.5.6 Software Version The software versions of the GNC 255 unit is complete and then remove the memory device and cable. Figure 3-40 Serial Number Display Unit Serial Number ID Is Used With The flyGarmin... the SYS Function. Turn the LARGE knob to the main menu. 3-22 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. Turn the SMALL knob to the main menu. 3.5.7 Serial Number The serial number of the GNC 255 unit are displayed. 5. Press the FUNC key to return to view the ...