iPad Garmin Pilot + GDL39: Performance Evaluation
  Dallas - Plainview - Albuquerque - Deming - Andrews - Dallas:   Start at rightmost node and proceed counter clockwise   We have tested the iPad + GDL39 equipment  installed in our Zenith 601 HDS, N314LB, during three days of  cross-country VFR flights along the following route: Dallas, TX - Plainview, TX - Albuquerque, NM - Deming, NM - Andrews, TX - Dallas. The route is displayed in the above screenshot of  the iPad.     Weather on days 1 and 3 was difficult, thus forcing full use of the system.  The performance evaluation below consists of four parts: The Good, the Not-so-good, the Unexpected, and Further Thoughts and Recommendations.   The Good   The Garmin Pilot supplies many useful pieces of data, carries out tasks  that previously were difficult or impossible to do, and generally helps  to make flight safer. Four aspects stand out for pilots restricted to VFR  flight.   1. The Weather option of the map overlays delivers the  VRF/MVFR/IFR/LIFR classification for ea...