Garmin GPSmap 585 Plus - Adjusting Sonar Zoom; Bottom Lock Sonar Feature

12 GPSMAP
®
585 Plus
Adjusting the Zoom
You can adjust the zoom manually by specifying the span and a xed starting
depth. For example, when the depth is 15 m and the starting depth is 5 m, the
device displays a magnied area from 5 to 20 m deep.
You also can allow the device to adjust the zoom automatically by specifying
a span. The device calculates the zoom area from the bottom of the water.
For example, if you select a span of 10 m, the device displays a magnied
area from the bottom of the water to 10 m above the bottom.
1 From a sonar screen, select RANGE/ZOOM.
2 Select an option:
• Select No Zoom to not use the zoom feature.
• Select Bottom Lock to lock the screen to the water bottom.
• Select Manual or Digital Zoom to manually set the zoom.
• Select Shift Zoom to manually adjust the zoom.
• Select Auto to automatically set the zoom.
Bottom Lock
You can lock the screen to the water bottom. For example, if you select a
span of 20 meters, the device shows an area from the water bottom to 20
meters above the bottom. It is useful for detecting sh close to the bottom.
The span appears on the right side.
1 From a sonar view, select MENU > ZOOM > Bottom Lock.
2 Select and to adjust the depth range above the bottom.
Adjust the display depth range
The depth range above the bottom