RMI

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The RMI instrument in Air Navigation uses GPS information and does not receive any radio waves.

The top part is the ADF indicator. The yellow needle is pointing towards the selected waypoint that corresponds to the longitudinal axis of the aircraft.

The compass outer ring will show your current course.

Below the main indicator the name of the active waypoint is displayed as well as the distance to the waypoint. It is possible to select any kind of waypoint (Airports, VOR, NDB, etc) as an ADF target waypoint unlike with a real ADF which requires NDB or AM transmitters as waypoints. You can select a new waypoint from the database with the "i" disclosure button on the bottom part of the instrument.

Please read Search Module for more information about it.

A “NAV” warning flag will let you know that you should NOT trust the ADF indicator in the following cases:

No waypoint is selected for the instrument;
The waypoint distance is over 250 nautical miles;
The GPS accuracy is less than 2.5 nautical miles.

Note: remember that you will ONLY find the slipball at the bottom of the instrument on iPhone/iPod Touch devices.

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