I'm running Garmin's BCM app on an iPad2, without internal GPS. I use a Garmin GLO which provides GPS to the iPad via Bluetooth. This is fine for location and saving tracks, but that's all you're going to get out of BCM, regardless of the external device. You cannot display a route and a track on the screen at the same time, you can't display a saved track and the active track at the same time, nor is there any provision (that I'm aware of or have found during use) for displaying AIS or any other data during active tracking. Garmin markets BCM primarily as a "planning" tool; allowing those with compatible Garmin chart plotters to share data over a common, onboard, wifi network. I would like to see Garmin expand the features of BCM to be competitive with iNavx, but until they do, based on my understanding and use of the app, you're not going to get any more data to display on BCM with the addition of any of the "muxers" because the BCM app doesn't support those functions. I eventually intend to upgrade to the new SH Matrix GX-2200 fixed mount VHF radio which has built-in GPS & AIS (receive only). At that point, if Garmin hasn't updated the performance of BCM to support AIS, I'll look into the iNavx app and integration of a mux unit to get the GPS & AIS data from the VHF to the iPad. Ultimately, I'd prefer to have a dedicated Garmin chart plotter with wifi capabilities to support use of the iPad, because as much as I love my iPad, it is not ideal as a chart plotter, but that's based on my personal use, your milage may vary!