Garmin echo 300c Owner's Manual - Page 20

Using the echo Showing the Battery Voltage Before you can show the battery voltage, you must open the Full Screen page (page 4), the Split Zoom page (page 5), or the Split Frequency page (page 5). 1. Select MENU > Setup > Sonar Numbers > Battery. 2. Select Show. Showing the Water Speed Odometer Before you can show the odometer, you must open the Full Screen page (page 4), the Split Zoom page (page 5), or the Split Frequency page (page 5). To reset the odometer to zero, see page (page 8). 1. Select MENU > Setup > Sonar Numbers > Odometer. 2. Select Auto. Setting the Number Size Before you can set the number size, you must open the Full Screen page (page 4), the Split Zoom page (page 5), or the Split Frequency page (page 5). 1. Select MENU > Setup > Sonar Numbers > Number Size. 2. Select a number size. Calibration Setting the Keel Offset The keel offset compensates for the surface reading for the depth of a keel, making it possible to measure depth from the bottom of the keel instead of from the transducer location. 1. Select an option, based on the location of the transducer: • If the transducer is installed at the water line ➊, measure the distance from the transducer location to the keel of the boat. Enter this value in steps 4 and 5 as a positive number. • If the transducer is installed at the bottom of the keel ➋, measure the distance from the transducer to the water line. Enter this value in steps 4 and 5 as a negative number. ➊ ➋ 2. From any page, select MENU > Setup > Calibration > Keel Offset. 3. Use and to select positive (+) or negative (-), based on the location of the transducer. 16 echo 200, echo 300c, echo 500c, and echo 550c Owner's Manual