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Astro 320 and DC40 Owner’s Manual 55
Customizing Your Device
◦ Fishing—(requires marine
maps) displays a detailed view
of bottom contours and depth
soundings. Simplies map
presentation for optimal use
while shing.
• Appearance—allows you to set the
appearance of marine navigation
aids on the map.
• Marine Alarm Setup
◦ Anchor Drag Alarm—alarm
sounds when you exceed a
specied drift distance while
anchored.
◦ Off Course Alarm—alarm
sounds when you are off course
by a specied distance.
◦ Deep Water/Shallow Water—
alarm sounds when you enter
water of a specic depth.
1. From the main menu, select Setup
> Marine > Marine Alarm Setup.
2. Select an alarm type.
3. Select On.
4. Enter a distance.
For more information on optional
tness accessories, see page 66.