is a great program, I think I have tried most of them. It is easy to use, very easy to install and to get it up and running just add a GPS "communicator" to a USB port. I have computer charts from Port Phillip up the east coast
, across the top and down to Exmouth WA, the charts are very detailed and great for coastal work. I use these charts and the "Russian" CM93, the OpenCPN
selects which is best for the zoom I apply and overlays both sets of charts. Pleased to help you with charts if you like, I am at Mooloolaba.