It's pretty obvious that Yankee just has a different set of needs than the vast majority of users. Be honest, you committed to the iPhone platform because it had an app that filled a specific need and did it well, and now you have an interest in seeing that platform continue its majority. And sure, I could continue the fun of everyone-getting-further-entrenched by pointing out the somewhat amusing juxtaposition of proclaiming 'too many workaround, too many excuses' and announcing you have an iPhone
and a Touch hooked up to a second network's 3G with a
third piece of hardware. And yeah, pointing that out was fun. But that's because I'm invested too.
Anyways, for anyone who's stumbled onto this thread and is actually looking for help with a chartplotter or some sort of SD card based nautical navigation, I found another workaround.
OruxMaps
Orux is an app that lets you get maps either through the realtime 3G,
or maps you yourself set up on your PC before hand, and downloaded to the SD card. It seems to do what you'd need it to do once you have the maps made and sideloaded to your phone.
But it's the making the maps that seems to be a little bit of a hassle, but thankfully it's somewhat standardized by also using the same format as
Official OziExplorer Web Site - GPS Mapping Software for Tracking and Navigation. Supports Garmin, Magellan, Lowrance and GPS
which to my admitted ignorance seems.. legitimate? Widespread?
The maps will need to be calibrated, but I
suspect that brings more peace of mind than hassle if you're relying on them out on open waters. Ozi Explorer seems to be a fairly expensive piece of software, so it looks like Orux has assembled a suite of alternatives:
OruxMaps
Anyways, this seems to be a rather small niche of users, but it is a case study highlighting one of the as-of-today drawbacks of Android; the market is smaller, so more niche-gaps exist. The Android Market is probably going to grow faster than App Store in terms of proportion, but at the end of the year, the App Store will still be more than twice as big, and gaps will remain.