Garmin 100 User Manual

Using the echo 100 and echo 150

The sonar screen shows a full-view graph of sonar readings from a 

transducer. The depth scale 

➊

 indicated on the right of the screen shows 

the screen depth as the screen scrolls from the right to the left, indicating 

suspended targets 

➋

. Bottom depth 

➌

, water temperature 

➍

 (if a 

temperature-capable transducer is connected), and transducer frequency 

➎

 

are indicated on the left side of the screen.
NOTE: The echo 100 operates only at 200 kHz, so the frequency is not 

displayed on the screen.

➋

➊

➎

➌

➍

You can adjust the range of the depth scale that appears on the right side 

of the screen. This setting determines how deep the sonar will search for 

returns.
1.  From the Sonar screen, select MENU > Range.
2.  Select an option:

•  To allow the device to adjust the range automatically based on the 

depth, select Auto.

•  To increase or decrease the range of the depth scale manually, select 

Manual, select   or   , then select ENTER.

You can manually adjust the zoom of the Sonar screen by selecting the span 

of the view and selecting a fixed starting depth. For example, if you select a 

span of 15 feet and a starting depth of 5 feet, the device will display an area 

from 5 feet deep to 20 feet deep.
1.  From the Sonar screen, select MENU > Zoom > Manual.
2.  Select the span you would like to show.
3.  Select the starting depth.