Whoa, $680. I'm still looking for that elusive "low-cost WiFi multiplexer" that some people keep mentioning.
Oh come on, this is making a fun game of "how many boat plotters can I buy for the price of one iPad plotter"?
$680 for the NMEA 2000 multiplexer
$500 for the iPad
$80 for the Dual Bluetooth XGPS
$300 for the Moxiware Tank Case (that is the one shown in this thread)
$50 for Navionics or iNavX
For that price you can get a 7" Raymarine A75 for the helm, and a 6" A65 as a remote display under the dodger:
A65: $620 at West Marine or Amazon
A75: $980 at Amazon
US charts: free
For $40 more you can get the A67 and have sonar/fish finder. Is adding full sonar (not just a depth number) even possible with iNavX and the iPad?
Of course that is overkill on most of our boats, the a single plotter for half the money is fine. Likewise the Moxiware Tank Case is probably overkill, there are plenty of <$100 waterproof cases for the iPad with port access.
The system that I'd actually buy is:
Raymarine i40 Wind Instrument: $425
Depth Transducer: $100
That gets you all of the basics (except for through-water speed, easy to add) at a reasonable price. I'd much rather have wind instruments then trying to make an iPad marine safe and work in the sun.
No one has mentioned the problems with iPads overheating that are out in the sun. If it happens here in Seattle it has to be even more common in other climates.