Garmin echoMAP CHIRP 73cv Owner's Manual

temperature-capable transducer (

).

Calibrate Water Speed: Calibrates the speed-sensing 

transducer or sensor 

Fuel Capacity: Sets the combined fuel capacity of all the fuel 

tanks on your vessel (

Vessel Type: Enables some chartplotter features based on the 

boat type.

Fill Up All Tanks: Sets the tank levels to full (

Add Fuel to Boat: Allows you to enter the quantity of fuel you 

added to your tank, when you did not entirely fill up the tank 

Set Total Fuel Onboard: Sets the combined amount of fuel in 

all the fuel tanks on your vessel (

).

Set Gauge Limits: Sets the upper and lower limits of various 

You can enter a keel offset to compensate the water depth 

reading for the transducer installation location. This allows you 

to view the depth of the water below the keel or the true depth of 

the water, depending on your needs.
If you want to know the water depth below the keel or the lowest 

point of your boat and the transducer is installed at the water 

line or anywhere above the end of the keel, measure the 

distance from the transducer location to the keel of the boat.
If you want to know the true water depth and the transducer is 

installed below the water line, measure the distance from the 

bottom of the transducer up to the water line.
NOTE: This option is only available when you have valid depth 

data.

Measure the distance:
• If the transducer is installed at the water line 

À

 or 

anywhere above the end of the keel, measure the 

distance from the transducer location to the keel of the 

boat. Enter this value as a positive number.

• If the transducer is installed at the bottom of the keel 

Á 

and you want to know the true depth of the water, 

measure the distance from the transducer to the water 

line. Enter this value in as a negative number.

Select Settings > My Vessel > Keel Offset.

Select   if the transducer is installed at the water line, or 

select   if the transducer is installed at the bottom of the 

keel.

Before you can set the water temperature offset, you must have 

a NMEA 0183 water-temperature sensor or a temperature-

capable transducer to measure water temperature.
The temperature offset compensates for the temperature 

reading from a temperature sensor.

Measure the water temperature using the temperature sensor 

or temperature-capable transducer that is connected to the 

chartplotter.

Measure the water temperature using a different temperature 

sensor or a thermometer that is known to be accurate.

Subtract the water temperature measured in step 1 from the 

water temperature measured in step 2.
This is the temperature offset. Enter this value in step 5 as a 

positive number if the sensor connected to the chartplotter 

measures the water temperature as being colder than it 

actually is. Enter this value in step 5 as a negative number if 

the sensor connected to the chartplotter measures the water 

temperature as being warmer than it actually is.

Select Settings > My Vessel > Temp. Offset.

Enter the temperature offset calculated in step 3.

If you have a speed-sensing transducer connected to the 

chartplotter, you can calibrate that speed-sensing device to 

improve the accuracy of water-speed data displayed by the 

chartplotter.

Select Settings > My Vessel > Calibrate Water Speed.

Follow the on-screen instructions.
If the boat is not moving fast enough or the speed sensor is 

not registering a speed, a message appears.

Select OK, and safely increase the boat speed.

If the message appears again, stop the boat, and ensure the 

speed-sensor wheel is not stuck.

If the wheel turns freely, check the cable connections.

If you continue to get the message, contact Garmin product 

support.

Select Settings > My Vessel > Fuel Capacity.

Enter the combined total capacity of the fuel tanks.

You can synchronize the fuel levels in the chartplotter with the 

actual fuel in the vessel when you add fuel to your vessel.

Select Gauges > Engine > MENU.

Select an option:
• After you have filled up all the fuel tanks on the vessel, 

select Fill Up All Tanks. The fuel level is reset to 

maximum capacity.

• After you have added less than a full tank of fuel, select 

Add Fuel to Boat, and enter the amount added.

• To specify the total fuel in the vessel tanks, select Set 

Total Fuel Onboard, and enter the total amount of fuel in 

the tanks.

You can configure the upper and lower limits and the range of 

desired standard operation of a gauge. When a value exceeds 

the range of standard operation, the gauge becomes red.
NOTE: Not all options are available for all gauges.

Device Configuration

31