Simrad IS20 Manual page 35

Depth alarm
The depth alarm can be set up for deep and shallow
water limits.
An anchor alarm can be activated to warn if the boat is
drifting. The alarm will sound when during a 40 seconds
time period there is a change in depth of 2-3 meters
(6 – 10 ft).
The Anchor alarm should be turned Off when the boat is
not at anchor!
Alarm
Deep
Shallow
Anchor
Range
Off - 650 ft 1.6 - 5:
5 - 10:
10 - 50:
50 - 100:
100 – 500: 10 ft
500 – 650: 50 ft
Off – 320 ft 1.6 - 5
5 – 10:
10 – 50:
50 – 100:
100 – 320: 10 ft
Off – On
Changing the default settings | 35
Change per
step
0.1 ft
0.5 ft
1 ft
5 ft
0.1 ft
0.5 ft
1 ft
5 ft
-
Default
value
Off
Off
Off