On a Ranger with digital dash, once you turn it ON, it stays ON until you turn it OFF. It will, however, go into SLEEP mode if no buttons are pushed for six hours. In SLEEP mode it will still draw power for the digital dash, and some things such as a bilge pump or touching any key will wake it up.
Essentially, you've never been turning your boat off. It's like leaving the power switch turned on - electronically - unless when done fishing, you enter the code and then STOP.
Call Ranger and get an owner's manual!