Garmin echoMAP CHIRP 73cv Owner's Manual

Select a gauge.

Select Gauge Limits > Custom > Edit Limits.

Select an option:
• To set the minimum value of the standard operating 

range, select Rated Min..

• To set the maximum value of the standard operating 

range, select Rated Max..

• To set the lower limit of the gauge lower than the rated 

minimum, select Scale Min..

• To set the upper limit of the gauge higher than the rated 

maximum, select Scale Max..

Select the limit value.

Repeat steps 4 and 5 to set additional gauge limits.

NOTE: Some settings and options require additional charts or 

hardware.
Select Settings > Communications.
Serial Port 1: Sets the input/output format for the serial port to 

use when connecting the chartplotter to external NMEA 

devices, computers, or other Garmin devices.

NMEA 0183 Setup: Sets the NMEA 0183 sentences the 

chartplotter transmits, how many digits to the right of the 

decimal point are transmitted in a NMEA output, and how 

waypoints are identified (

).

NMEA 2000 Setup: Allows you to view and label the devices on 

the NMEA 2000 network (

).

Marine Network: Allows you to view the devices with which you 

are sharing maps, sonar, or radar. Not available on all 

chartplotter models.
NOTE: You can only view networked data on a model that 

supports that data. For example, you cannot view networked 

radar on model that does not support radar.

The chartplotters support the NMEA 0183 standard, which is 

used to connect various NMEA 0183 devices, such as VHF 

radios, NMEA instruments, autopilots, wind sensors, and 

heading sensors.
To connect the chartplotter to optional NMEA 0183 devices, see 

the chartplotter installation instructions.
The approved NMEA 0183 sentences for the chartplotter are 

GPAPB, GPBOD, GPBWC, GPGGA, GPGLL, GPGSA, GPGSV, 

GPRMB, GPRMC, GPRTE, GPVTG, GPWPL, GPXTE, and 

Garmin proprietary sentences PGRME, PGRMM, and PGRMZ.
This chartplotter also includes support for the WPL sentence, 

DSC, and sonar NMEA 0183 input with support for the DPT 

(depth) or DBT, MTW (water temperature), and VHW (water 

temperature, speed, and heading) sentences.

Select Settings > Communications > NMEA 0183 Setup.
Sounder: Enables NMEA 0183 output sentences for the 

sounder (if applicable).

Route: Enables NMEA 0183 output sentences for routes.
System: Enables NMEA 0183 output sentences for system 

information.

Garmin: Enables NMEA 0183 output sentences for Garmin 

proprietary sentences.

Posn Precision: Adjusts the number of digits to the right of the 

decimal point for transmission of NMEA output.

Waypoint IDs: Sets the device to transmit waypoint names or 

numbers via NMEA 0183 while navigating. Using numbers 

may resolve compatibility issues with older NMEA 0183 

autopilots.

Diagnostics: Displays NMEA 0183 diagnostic information.
Defaults: Restores the NMEA 0183 settings to the original 

factory defaults.

Select Settings > Communications > NMEA 2000 Setup.
Device List: Displays the devices connected to the network.
Label Devices: Changes the labels for available connected 

devices.

You can name devices and sensors connected to the Garmin 

Marine Network and the NMEA 2000 network.

Select Settings > Communications.

Select Marine Network or NMEA 2000 Setup > Device List.

Select a device from the list on the left.

Select Change Name.

Enter the name, and select Done.

Select Settings > Alarms > Navigation.
Arrival: Sets an alarm to sound when you are within a specified 

distance or time from a turn or a destination.

Anchor Drag: Sets an alarm to sound when you exceed a 

specified drift distance while anchored.

Off Course: Sets an alarm to sound when you are off course by 

a specified distance.

Alarm Clock: Sets an alarm clock.
Device Voltage: Sets an alarm to sound when the battery 

reaches a specified low voltage.

GPS Accuracy: Sets an alarm to sound when the GPS location 

accuracy falls outside the user-defined value.

Before you can set a fuel level alarm, a compatible fuel flow 

sensor must be connected to the chartplotter.
You can set an alarm to sound when the total amount of 

remaining onboard fuel reaches the level you specify.

Select Settings > Alarms > Fuel > Set Total Fuel Onboard 

> On.

Enter the remaining amount of fuel that triggers the alarm, 

and select Done.

Select Settings > Units.
System Units: Sets the unit format for the device.
Variance: Sets the magnetic declination, the angle between 

magnetic north and true north, for your present location.

North Reference: Sets the direction references used in 

calculating heading information. True sets geographic north 

as the north reference. Grid sets grid north as the north 

reference (000º). Magnetic sets the magnetic north as the 

north reference.

Position Format: Sets the position format in which a given 

location reading appears. Do not change this setting unless 

you are using a map or chart that specifies a different 

position format.

Map Datum: Sets the coordinate system on which the map is 

structured. Do not change this setting unless you are using a 

map or chart that specifies a different map datum.

32

Device Configuration