1) Trying to figure out if the additional track locations will be worth it on the 2012 i-pilot models. Does the unit save the last track info if the unit is powered down? If I'm on a trip and unplug the trolling moter is the info lost or saved until written over?

2) How fast can I go over a path and record the track and still retain the info? Can I use the outboard to cruise along the path and record the track? I'm not sure how often it samples the location.