Just received my new chip today... it is stamped March '06 and doesn't have Squam on it. Or many others in the area. I emailed with a fella at Navionics the other day and gave him a list of a bunch of lakes in the area that weren't on their list. He said they sincerely would put the list in the "system" for the next batch of mappings. We'll see.
Looking forward to using the new HD map of winni.

i dont have one, but when looking them up this winter i remember seeing that they do work if the hull of the boat is aluminum, but not as well on a fiberglass hull. something about the grounding on aluminum boats.