I have 16GB nexus 7. It has an onboard GPS which operates independent of WiFi
connection. When I need WiFi aboard I use my T-mobile smartphone to create a hotspot. In the SF Bay
Area where I sail I get coverage to about 10 miles offshore
and excellent coverage in the harbors I frequent, HMB, Santa Cruz
I can also say that on my unit the GPS performance is excellent. I obtain a fix in several seconds in a car , same below deck
with fiberglass cabin
I currently have "MX Mariner" loaded. App costs $7 but enables download of NOAA charts
for offline use so you have a small plotter as a backup to your prime GPS. I also have loaded "GPS Status" which provides, among other things, DOP, HDOP and VDOP precision metrics which are useful if you are using your GPS position for navigation
Finally I loaded "Sailos Log" which provides compass
, speed, bearing and and trim information. The trim is particularly interesting. If your nexus is set up properly on the boat you can monitor
, yaw, etc. Amazingly these seem to be reasonably accurate and the unit allows you to record
status over time.
If you can tolerate moving between several apps I think you could put together a pretty robust chartplotter
capability with unique features not found on commercial
I am sure there are many other nav apps that may be equivalent or better.
In my opinion this is a superb tablet. I am blown away by screen
brightness which is clearly readable in bright daylight. Not as good as my daylight readable plotter but pretty damn close for a $280.00 unit.
I will be receiving a mounting bracket tomorrow which I intend to use to mount the unit in the boat.
Overall I am extremely pleased with this tablet.