I just bought a boat after Christmas from another CDC member... of course, the weather has been awful here in MO, so haven't had it out, nor will I anytime soon because of this (-16 called for on Saturday, and more snow today!)...

Anyway, the boat has the humminbird 797si at the console and the 788c at the bow, they are interlinked together (I'll pretend for now I know what they exactly means and how it works)...

My question - I know I need a memory card for each to save waypoints, etc... I think they will both take 2 - do I really need 2 for each, or would I be okay with 1 in each - and what should I get - thinking just a basic SD card from Best Buy or something like that...???

Thanks in advance...