Alarm Setup - Simrad IS20 Manual

5.3 Alarm setup

The IS20 may be set up to sound an alarm if vessel or
environmental parameters exceeds preferred values.
The alarm monitoring is disabled by setting the value to
Off.
Boat speed alarm
Used to give alarm if the boat speed goes beyond a
selected value.
34 | Changing the default settings
Range
Off - 50 kn
50 - 60 kn
Change per step
1 kn
5 kn
Default value
Off
Off