The Seaclear II program is a free software download. It's had good reviews online.
The charts are free downloads from NOAA.
The gps receiver can be purchased on e-bay for under $30.
There are other seaclear II/NOAA chart dvd deals on e-bay with the gps receiver for under $70
Peter
1981 32' sedan bridge
twin Chrysler 360 cu. in. 250 hp engines
Raw water cooled
Nimbus II
Home port: New Buffalo, MI