Humminbird 998c Si Software Update

Humminbird has released the next batch of updated software for many of their units. These are free software upgrades which include Down Imaging (DI) for SI units, Switchfire 2D Controls, GPS improvements, LakeMaster capabilities and a few more tweaks and fixes.

Jan 31, 2010  Tutorial on how to properly update your Humminbird Side Imaging Unit using an SD Card. Download the update from Humminbird.com then copy and paste the update. Dec 9, 2014 - Is there a particular update version that works best or is 'the one' to have for the 998c SI? I don't have anything extra connected to the unit.