Operation Manual
Table Of Contents
- GPSMAP 172/172C
- Introduction
- Getting Started
- Keypad Usage
- Selecting Options
- Entering Data
- Initializing the Receiver
- Power On/Screen Backlighting
- Simulator Mode
- Main Pages/Map Page
- Map Cursor
- Marking Waypoints
- Using the NAV Key
- Simulated Tour
- Reviewing/CreatingMap Waypoints
- Compass Navigation Page
- Highway Page
- Active Route Page/Main Menu Page
- Deleting Waypoints/Powering Off Unit
- Reference
- Map Page
- Map Page: Cursor
- Map Page: Options
- Compass Page
- Highway Page
- Highway Page Options
- Creating Waypoints
- Reviewing/Editing Waypoints
- Waypoint Lists
- Going to a Destination
- TracBack Navigation
- MOB: Man OverBoard
- Creating Routes
- Creating a Route/Following a Route
- Route List Page
- Route Review Page
- Editing Routes
- Active Route Page
- Find Key
- Find Options
- Main Menu Tabs
- Main Menu:GPS Tab
- Main Menu:Tide Tab
- Main Menu: Trip/
- Main Menu: Track Tab
- Main Menu: DSC Tab
- Main Menu: DSC/Card Tabs
- Main Menu: Temp Tab/Setup Tab
- Main Menu: Comm Tab
- Main Menu: Alarm Tab
- Appendix
- Index
Main Menu: Comm Tab
NMEA Interface
If you are going to interface the GPSMAP 172/172C with another piece of equipment (such as a
radio or autopilot), the unit needs to be set to output NMEA data. More information on wiring and
NMEA data may be found on page 92.
To activate the NMEA data:
1. On either port of the Comm Tab, highlight the ‘Serial Data Format’ field and press ENTER.
2. Select ‘NMEA In/NMEA Out’ and press
ENTER.
Advanced NMEA Output Setup
The GPSMAP 172/172C NMEA data transmission can be customized to change the precision of the
Lat/Lon minutes, set up the waypoint IDs, and keep the output rate at two seconds. If the unit is set up
to output all of the available NMEA sentences, the output rate may exceed two seconds. The ‘Advanced
NMEA Output Setup’ page allows you to turn on/off the GPS status (GSA. GSV), Waypoint/Route
(WPL, RTE), and the Garmin Proprietary sentences. See page 92 for more information on wiring and
NMEA data.
Lat/Lon Minutes Precision allows you to adjust the number of digits to the right of the decimal
point for transmission of NMEA Output, either 2, 3 or 4 digits. The Waypoint ID setting lets you
choose to output the waypoint identifiers as names or numbers.
To set up the Advanced NMEA page:
1. Highlight ‘NMEA In/NMEA Out’ in the Serial Data Format field, and press MENU. Select ‘NMEA
Setup’ and press ENTER.
2. To change the settings, place the highlight over the desired field and press
ENTER. Make a
selection and press ENTER again to accept the selection.
Activating NMEA data
75
Reference