Before I had my iFly I had a Lowrance 2000c. Amoungst it's available screens was an HSI which I'm very excited to now have on the iFly with the fantastic new 7.5.18 release
A really useful feature that the Lowrance had for the HSI was the 'OBS Hold'. What this did was as follows:
- Pick a waypoint as a destination e.g. VOR like 'FZT';
- Activate 'OBS Hold' mode;
- You could then use left/right arrows to rotate the 'course' to whatever radial you wanted to/from the current waypoint;
- The course-line shown would then reflect the chosen 'OBS radial to/from' the waypoint;
So lets say ATC said to fly the 320 radial from FZT, you selected FZT as your waypoint, activated OBS Hold mode, selected the 320 from radialwith the left/right arrows. And then you could use the HSI to get yourself onto that radial and fly it until told otherwise.
Here are a couple of screen shots:
First a normal example of the HSI flying direct to a Waypoint (i.e. normal mode direct to just like we now have, no radial selection made):
Notice in the above the little white triangle on the course inicator points in the same direction as the course arrow (indicating a course to the waypoint).
Now using the OBS mode (in this case it happens to be flying From rather than to), but:
Notice the little white Traingle on the course arrow line now points in the opposite direction from the Course indicator, i.e. it incates that the course is from the waypoint..
The NMEA output worked fine and sent the autopilot outbound on the radial too!
Anyway, now that we have an HSI......I figure no harm in asking.
P.S. I kinda liked the CDI instrument box too (basically a graphical alternative to the current Cross Track Error).