B4 anyone says dump it .... Curiosity can kill a lot of time - I've done that with the Raytheon vintage 2000 equipment my boat came with.  I sail my 2000 C36 MK2 on upper Mississippi- 60 miles SE of Minneapolis. Yes, if the weather is crappy and I don't see the other side of the river, 1.5 - 2.0 miles across, who cares.  I don't, I stay at the dock.  However, my boat came with Autohelm Nav Center 600 and am a visual guy....the manuals don't work for me.  Can't find you tube instructions (yeah, some one had to have done this) as I keep getting high jacked to non relevant sights.  Also looking for you tube instructions for Raytheon ST 60 & ST 4000 autopilot (yes, I have the C-Map chip for upper Mississippi).  Just want to learn what I've got.... Not gonna replace these units as am not going out to Great Lakes or Gulf of Mexico or Caribbean.  I pad is in color, and am aware of Navionics chart plotter - I do have pretty good ATT coverage for iPad & Verizon for phone 6S.  Suggestions for video links would be appreciated.