Zero Visibility Flight or ZVF was a standout feature of the Raven X1-11. An innovative sensor system, it allowed the helicopter's radar and sonar to create computer-generated images in low-visibility situations. This, in turn, allowed for piloting and weapons targeting in conditions that would otherwise be highly problematic.
With Dr. Leslie Thompkins' help, Bruce Wayne was able to adapt the technology to allow him to see while he was temporarily blind. ZVF was sufficiently sophisticated to let Batman fly the Batwing with great precision.