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We have prototyped a feature based on a niche request to add functionality similar to OBS line functionality offered by another product. We have put this feature under a new category of "Advanced Tools" which (for simplicity) do not appear in the user interface unless the user has explicitly opted in to them. To enable access to the tool, scroll down to the bottom of the Navigation Options screen where there is a switch.
Track Radial is similar to Track Waypoint in that it appears in the What's Here menu for a waypoint on the map. When you select Track Radial you are prompted to enter the radial you are interested in, then when you press Done the feature activates. Just like the existing Track Waypoint feature the distance and bearings to and from the selected waypoint are then displayed in the Position instrument at the top of the screen. However in addition to this, the HSI enters an OBS mode where you can see your cross-track error relative to the radial you have selected, and easily intercept it if that's your goal.
We would like feedback as to how this feature works in the prototype (beta). Is the horizontal cross-track error scale correct? At the moment we've got one dot equals one nautical mile, but some drop pilots have indicated that 0.1 nautical mile might be better. Also, what should the bug on the HSI do when it's in OBS mode? In the prototype it shows the radial you have entered, whereas we could leave it to do what it did before: point to your next route waypoint.
Just like Track Waypoint, to turn off the feature, simply tap in the Position instrument and everything returns to normal.
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