I was using my Dual 150 for street navigation, and after about 10 minutes on the freeway, the screen says "finding your location," which means it doesn't have NMEA data or correct NMEA data.

I figured out the problem was from using the DUAL SkyPro Mock location application, and having it set for 5Hz updates.

My navigation app is designed for 1 Hz, so it (crashes) after a while.

Fortunately, you can just go back to the SkyPro app and change the updates setting to disable 5Hz updates for "normal" apps.

Also, since TA has support for the DUAL 150, you won't have to bother with the SkyPro app, until you end your TA session(s.)