The relative bearing on an ADF changes from 265° to 260° in 2 minutes of elapsed time. If the groundspeed is 145 knots, the distance to that station would be

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The ADF is tuned to a nondirectional radiobeacon and the relative bearing changes from 095° to 100° in 1.5 minutes of elapsed time. The time en route to that station would be

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While maintaining a constant heading, a relative bearing of 15° doubles in 6 minutes. The time to the station being used is

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To track outbound on the 180 radial of a VOR station, the recommended procedure is to set the OBS to

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