I would be VERY careful in using the Auto Guidance. I used it a few times and never again until there are some real improvements.
Case in point, I was going from Oaks Bluffs to Edgertown on Martha's Vineyard . A 4 or 5 mile trip this I did not have planed out using Homeport and down loading it. Never been there before, I used the Auto Guidance. I had and I thought everything set right! Depth at 10 ft, shore line distance normal and can't remember all the other setting.
We had friends waiting for us at Edgertown and there where watching us on AIS. About 2/3 into the trip my phone went off. One of my friends, "Get the hell out of there, your going though a rocky area!" The chart plotter was only showing the bigger rocks. I made 180 and got back into 25+ water. I was even telling my friend, "other boaters were in there too". He made a good point, they where most likely locals and new the waters.