Figure 1-2 Radial Indication

CHAPTER ONE

BASIC INSTRUMENT PROCEDURES

Figure 1-2 Radial Indication

TACAN Orientation

It is essential that the student be able to orient himself to the station with the

information provided by the BDHI. As every advanced student knows, TACAN

provides azimuth as 360 radials emanating from the station like spokes from a

hub in a wheel.

ii.

These radials are identified by their magnetic direction from the station, as

indicated by the position of the tail of the number two needle on the compass

card (Figure 1-2).

iii

In essence, the BDHI presents a geographic depiction of aircraft location

relative to the selected TACAN station, as well as its heading (Figure 1-3). It

can be used as a simple plotting board. The station is represented by the center

of the BDHI while the aircraft position is on the tail of the number two needle.

The head of the needle indicates the heading to fly to the station while the

aircraft heading is indicated under the heading indexer. Distance from the

station is displayed in the DME readout window.

1-14 BASIC INSTRUMENT PROCEDURES