[RBJ]

I'm not trying to criticise MacENC here. It's a terrific product. I understand that there are different standards and MacENC only works with open standards.

My problem is that I will shortly be buying more electronic charts and I like the Navionics product. In any case I'm not sure that any of the other suppliers would be any better so far as compatibily is concerned.

What I don't like is Navionics fiddling with the data (or adding more data) to make my charts unreadable on certain equipment. I don't want to have to choose to buy Chartworld Navionics for my Mac/ENC or Navionics Navionics for my plotter. I want to buy the charts and use them on both but I'm certainly not buying them twice.

This use of DRM to restrict consumer choice re hardware/software seems similar to what the music companies are doing and they have run foul of the European commision.

I would like to get my facts straight before I tackle Raymarine and Navionics and I'm still not clear whether I can use Chartworld Navionics on my plotter.