Figure 10 - P-8010017

INSTRUMENT NAVIGATION

IND-350

The IND-350 (Figure 10) is the secondary navigation instrument in the VOR/TACAN

system and serves as an aid in interpreting the RMI. Its components consist of a Course

Deviation Indicator (CDI), a TO-FROM indicator, an OBS (Omni Bearing Selector), and a

VOR/TACAN selector switch.

The IND-350 uses VOR or TACAN magnetic bearing to show the aircraft's position in

relation to a selected course. The selected course is set with the OBS knob. The course

deviation indicator (vertical bar) will be centered if the aircraft is actually on the selected

course. For an off course condition the bar will be displaced to one side or the other. The TO-

FROM indicator shows whether the selected course, if flown, will take you to TO or FROM

the station. The VOR/TACAN switch enables the pilot to select VOR or TACAN information

for display on the CDI. If both the IND-350 and the RMI are operating and a course

discrepancy is noted between them, the RMI indication is more reliable.

NOTE: If there is a discrepancy between the RMI and CDI needles, rely on the RMI needle.

Figure 10

RADIO AIDS TO NAVIGATION 1-11