Humminbird 300 SERIES 345C DI - Manual (Page 64)

Alarms Menu Tab
From any view, press the MENU key twice to
access the Main Menu. The Alarms tab will be
the default selection.
NOTE: When an alarm is triggered, you can silence it
by pressing any key. The alarm will be silenced, and
will not be triggered again until a new instance of the
alarm condition is detected.
Alarms Menu
Alarms Menu Tab 55