RE: Furuno NavNet 3d
We are in the throes of upgrading our entire electronics suite on our boat. Having looked at demo models of the Furuno NavNet2 and Navnet3d models on the dealer's shelves, I'm pretty much convinced that the NavNet2 is for us. Much more intuitive to operate, and it has been out since around 2002 so has been well proven. In fact apparently it is still the biggest seller is Furuno's lineup.*
I found that the NavNet 3d was overly complex, which isn't necessarily a bad thing if the benefits are there (which they may well be) but for someone who only can only get out on the water after winter layovers, I much prefer a system that allows me to get back up to speed quickly while I'm trying to remember the difference between a rolling hitch and and a bowline.