Posts: 2323
Location: Stevens Point, WI | From my understanding, it won't be available until September. However, these releases can be delayed. I would suggest, for the little time it takes to do an update, do the 4.0 update, it won't hurt you, it'll only get the best performance out of your unit.
Since the unit defaults back to General Fishing mode when you do the update, this mode being mainly for saltwater use, make sure once you've done 4.0 update you go into Menu, Sonar Features and change it to Shallow Water mode. This is a must, otherwise you'll have problems with depth readings.
Edited by TJ DeVoe 8/3/2011 2:47 PM
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