Just finished a short run of about 100nm and used it to test out several nav apps: Navionics
, Plan2Nav, and MemoryMap. My 2c:
. Same great cartography on the Android app, but that's about it, very limited functionalty. Not even simple stuff like ETA. Basically you can just display a chart and display routes and waypoints...not even a real goto or follow capability...just an icon for your position and an image of the selected route/wp.
Plan2Nav. CMAP cartography seems a bit better than older versions, but still not as good as Navionics, at least not in Belizean waters. Though their Belize
cartography is now better than the laughable rubbish they used to have for here. More nav functionality than the very limited Navionics, but still only very rudimentary.
MemoryMap (MM). I did not download charts
for MM so can't comment on the cartography (I just used the very general base map), but the Nav finctionality is quite good...similar to what you would expect from a real chart plotter. User configurable "dashboard" with many common data fields to choose from. Best route
and waypoint editing capabilities too.
All these apps have limited interoperability functionality (import, export, etc).
I was able to run all three concurrently on my Samsung Tab 2 (10") with only occassional glitches. Plan2Nav seems especially sensitive to not being the foreground app and often loses position, track etc when in background. MM handles this the best and even has a configuration option specifically for maintaining track while in background.
Also ran GPS
Essentials, which is a very good GPS
utility, but unfortunately has no nautical chart abilities. I run it on my phone
and in effect it becomes a handheld GPS with a user configurable dashboard.