Adjusting The Zoom On The Sonar Screen Automatically - Garmin 150 Owner's Manual

Adjusting the Zoom on the Sonar Screen
Automatically
You can adjust the zoom of the Sonar screen by selecting the span of the
view and locking the screen to the contour of the water bottom. For example,
if you select a span of 10 meters, the device will display an area from the
water bottom to 10 meters above the bottom.
1. From the Sonar screen, select MENU > Zoom > Auto.
2. Select the span you would like to show.
3. Select the starting depth.
Pausing the Screen
From the Sonar screen, select MENU > Pause.
resuming the Screen
After pausing the sonar screen, select MENU > Resume.
Setting the Gain Manually
The gain setting controls the sensitivity of the sonar receiver to compensate
for water depth and water clarity. To see more detail, increase the gain. If the
screen is cluttered, decrease the gain.
To set the gain manually, increase the gain setting until you begin to see
"noise" in the water portion of the screen, then slightly decrease the gain.
1. From the Sonar screen, select MENU > Gain > Manual.
2. Select to increase the gain setting until you begin to see noise in the
water portion of the screen.
3. Select to decrease the gain.
echo 100 and echo 150 Owner's Manual
Setting the Gain to Auto
1. From the Sonar screen, select MENU > Gain.
2. Select an option:
• To display the sonar screen with higher sensitivity and to show
weaker signals and more noise, select Auto-High.
• To display the sonar screen with normal sensitivity, select Auto-Med.
• To display the sonar screen with lower sensitivity and less noise,
select Auto-Low.
Setting the Shallow Water and Deep Water Alarms
You can set an alarm to sound when the depth is shallower or deeper than a
specified value.
1. From the Sonar screen, select MENU > Setup > Alarms.
2. Select an option:
• To sound an alarm when the depth is shallower than the specified
depth, select Shallow > On.
• To sound an alarm when the depth is deeper than the specified depth,
select Deep > On.
3. Select the depth that triggers the alarm.
The alarm setting appears on the Alarms screen.
Using the echo 100 and echo 150
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