Corrections

CHAPTER SIX

T-34C INSTRUMENTS

Turn to this updated heading.

NOTE

Try to expedite these first six steps to establish the aircraft on a

heading that will take it in the general direction of the new fix.

Visually determine if the line that connects the two fixes is vertical. This line

represents your desired track. If it is vertical, you are on the correct heading at that

instant. Apply any wind corrections that are required to remain on the proper track.

If your line is not vertical, you must turn the aircraft to make it so. This can be done

without the aid of a straightedge. If the line tilts right, turn right to make the line

vertical. If the line tilts left, turn left to make the line vertical.

While enroute, twist in the desired fix radial or course to provide correct sensing and

enable you to accurately identify the fix. Toggle the VOR/TAC selector under the

altimeter to TACAN.

CORRECTIONS

As the aircraft approaches the point, it will be necessary to determine which you will

reach first the radial or the DME. To come as close as possible to the new point, it

will be necessary to judge the rate at which the DME is moving and the rate at which

you are crossing radials. If it is determined that one rate is moving faster than the

other, it may be that the aircraft will reach the DME or radial first rather than

simultaneously. Keep the following in mind when trying to hit a point:

DME Rate of Change

(a)

When the needle is closer to the heading index than the 90 benchmark,

i.e., above the 45 benchmark, the DME will change faster than the

radials. The opposite is true when the needle is nearer the 90

benchmark, i.e., when the needle is below the 45 benchmark.

(b)

Remember, when the head of the needle is above the 90 benchmark, the

DME will get smaller. When the head of the needle is below the 90

benchmark, the DME will get larger. The only exception to these rules is

in the case of strong winds aloft.

(c)

To get your DME to "speed up," turn to place the needle closer to the

heading index. This will slow the rate at which you are crossing radials.

When going inbound, you will be working the head of the needle. When

going outbound, you will be working the tail.

ii.

Radial Rate of Change

(a)

To cross radials faster, turn to place the needle closer to the 90

benchmark. Simultaneously, the rate that the DME is changing will slow.

6-56 RADIO INSTRUMENT FLIGHT PROCEDURES