Hmm recently bought a Lowrance Elite 7 hdi with CHIRP ..simply amazing technology.today the Navionics plus 1 gb micro sd card arrived WOW!
It holds all of North America..ie Canada and Usa...lakes rivers and ocean...bottom contour lines..1 foot level..the equivilent paper nautical charts$$$$$$$...and fill my living room...all updatable..freshest info for 1 year
Steven