I just purchased a new laptop (before I HAD to purchase a new laptop) the old Dell has too much sea time and dodged a few to many bullets. I have been using Offshore Navigator for years. For the new lap top I just purchased software, complete with all US Charts, from Cruisingservices.net. The new laptop doesn't have a CD/DVD drive so I purchased the program / charts on a flash drive for $44.95 I also purchased their compatible GPS unit. Total cost for everything, $124.95. If you have a DVD drive and a GPS unit they offer the program complete with all US Charts for only $19.95. So far I am pleased with the ease of use with regard to planning routes. One great option is you can open multiple routes and it connects them. I am taking a boat from the NE to the west coast of Florida later this week so it will get a real test. Regardless of the electronics on board I always bring my own and record all of my trips. I think this system is a great value. Just wanted to pass it on.