Electronics for Dive Boat
I ended up with a NorthStar (NavMan) 660 which is a 7" Portrait, and it works a treat. However, in hindsight I would have gone a SH all inclusive 8".
The only reason I did not was because the suckers are not advertised or marketed well in oz, and I did not even know they existed until coming across accidently and then doing my homework on them, and playing with one.
Stating that - Bang for Buck, the Northstar and associated VHF works a treat.
The portrait is great as my primary screens are the chart & Sonar, and Portrait presents better than the landscape. I have also customised the Highway and Sonar as an alternative display as well.
Great system for $$ and has not failed me yet. Again however, go the SH. Great system.
I checked out the Lowrance, Furuno etc as well.