Just an FYI- for those of you who have purchased a new Lowrance HDS unit or are considering one, the software update for the HDS units will be available May 15th online according to company sources. This update will enable the use of Navionics plug-in mapping charts and other software enhancements.
Download it here:
http://www.lowrance.com/en/Downloads/Product-Software-Updates/
Jim Carroll NPAA #13