The closer you get to the beacon, the more sensitive the adf needle will become As you pass overhead the beacon, the needle will ‘drop’ It will move from roughly the 12 o’clock position to the 6 o’clock position If you fly directly overhead the ndb, the needle will drop quickly. Even if the magnetic variation at the vor station and the aircraft are different, the indicator will continue to display the actual magnetic radial from the station (qdm), which can be plotted directly. The rmi has one or two needles which can be used to indicate navigation information from either the adf or the vor receivers
Both needles are different in appearance, one of them operating with nav 1 or adf 1 radio and the other one operating with nav 2 or adf 2 radio. The pilot flies the arc by keeping the rmi needle pointed towards the left wingtip while flying a series of short straight legs The chart coverage available depends on where you plan to fly and whether you will be in upper or lower airspace. In today's video, we are going to talk about qdm, qdr, and ground station quadrant The qdm is the relative bearing to the station, the station can be a vor or an ndb. Radio magnetic indicator (rmi) to save space in the instrument panel and to consolidate related information into one easy to use location, the radio magnetic indicator (rmi) has been developed
