Setting The Time Offset - Simrad IS20 Manual

4.4 Setting the time offset

The time function in IS20 is only available when a GPS is
connected to the system.
The GPS runs on UTC time, and can be adjusted to show
local time by entering a UPC offset value.
Range Step Default value
+14 h - –12 h 0.5 hours 0 hours
The log/timer function | 31