Good day all,  
Been trying to do some research and have come up empty.  There is a lot of info for the fresh water trolling units but I have a Riptide and fish almost exclusively salt.  Will I be able to "follow contour" with the existing contour lines on the HB unit?  I have used Navionics and it appears to be a great product but I read that minn kota requires lake master to follow contour?  I did not see a West Coast Ocean chart for lake master.  Thanks from a newb.  Cheers.