A "radio magnetic indicator RMI" would show a reference to the direction you were flying and would point in the direction you had to fly to get there. An ADF, however, is just a dumb “homer” that simply points to the NDB. The more sensitive the needle is to directional changes the closer you are to it. In this approach use your Nav 1 and/or Nav 2 radios (or both) and set for NMN, 212 degree radial, and GRB, 013 degree radial. The closer the VOR indicators come to lining up the closer you are to the NDB and R/W. The DME from MNM is 21.4nm and from GRB is 22.8nm.
Originally Posted by RyanbATC
NDB approaches are usually accompanied by another distance measuring device, either at the airport of offset like this one..
PS It's like flying to a fixed point. Importan to keep the needle straight and your heading at 301 degrees. Those two conditions must exist. Example: A cross wind could blow you off course, the needle could be straight up indicating you were flying toward the NDB, but if your course isn't 301 degrees your not on the R/W heading, although a slight turn tothe left once you see the R/W is required as well.
Last edited by NikeHerk67; 04-08-2010 at 09:25 PM.
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