With info from here I just made up a black box with Ac to 12v and power cable to run my 998 in the house. Next step I suppose would be to connect unit to my PC but as I'm just getting started I'm not sure of the benefits / risks (like corrupting the unit). If I do cable up I assume I'd be able to edit waypoints while they are still on unit using HumminbirdPC without having to export, etc., but don't know if that is actually a good idea to do or not? What other capabilities am I missing out on if I don't connect to my PC? Advice much appreciated!