Figure 21 - P-8010116

INSTRUMENT NAVIGATION

Figure 21

So, in both cases you have noted that you are actually flying a ground speed of 6 NM/min or

360 kts, thus indicating a headwind. The canting of your pencil indicates a crosswind;

therefore, confirming the actual wind from the northwest.

To complete a good point-to-point, you must now apply your knowledge of the wind and turn

from your current position (078R/38) to a new course and the desired point of 025R/60,

remembering to crab to hold yourself on that new course. You can then determine your

estimated time of arrival by recalling that you have done 6 nm/min, and applying that knowledge

to the distance you measure from the 078 R/38 to the 025R/60. The distance is about 48 NM,

so you would arrive in 8 minutes.

SUMMMY

You have learned three methods of point-to-point navigation. The pencil/eyeball method is

the method to utilize in the air. Although initially not as accurate as the CR-2 method, it saves

time and will become accurate as your proficiency develops. Your eventual goal is to involve

logic as much as possible to solve your point-to-point problems. Until that time, the

pencil/eyeball method and, to a lesser extent, the CR-2 will be utilized to help your

In addition to the TACAN and VOR, the T-34 can utilize its Area Navigation System

(RNAV) and accurately solve for point-to-points through its remote navigation computer.

Waypoint (point-to-point) bearing, distance and angular crosstrack deviation are continuously

supplied by the RNAV computer. Utilization of this system will be further examined in your

Flight Preparation Classes.

5-18 TACAN POINT-TO-POINT