I too have an iPad2 which I use on our trawler
yacht. I am running both Navionics and Memory Map. Vector and Raster charts respectively.
Generally I use Memory map (here in NZ) perhaps because I am more familiar with it's raster charts the waypoint and route
features .But both are excellent and I use the dedicated chart plotter,a JRC, only as a depth
It is hard to fault the iPad2 and cost wise it is amazingly cheap
. Plus it does practically everything else you need on board. Internet
web searching,email are just the beginning.
I have installed and use frequently:
Quake watch - with Christchurch in mind
Numerous news sites
The iPad2 is in the wheelhouse so there are no concerns about weather or sunlight.
The charts are much clearer brighter and a fraction the price
on my older C Map charts on the plotter.
I am using a RAM iPad mount and a car charger
and a connector cord to our stereo system for music
And yes you can watch video
No doubt serious overkill but it is an amazing onboard tool
I even found a sound meter app which I am using to determine where best to add noise insulation
around the engine
Now if i could just find a depth sounder
All in all a more than credible alternative IMO to much of the overpriced and dated dedicated marine