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This lesson will explain how to use 2 VOR's
to find your exact location. This can be handy on longer flights. You'll need a pencil and a ruler. You probably wouldn't use a pencil and a ruler in real flight but this will help explain things better. Lets set the Cessna on Runway 31L at JFK in New York. For this lesson we're going to take off but we really don't plan on landing. This is just to teach you some navigation tips. Before we take off lets set the
NAV2 radio to the JFK VOR of 115.9. Lets set NAV1 to 117.70 which is the VOR
of Deer Park, which is northeast of JFK. There probably is an error in your manual. 117.70 is the correct VOR
for Deer Park. lets get the plane rolling and get it in the air. after we've cleared the runway make a turn to heading 70. Climb to about 2000 feet and put the AP on (Z) Hit Control H to hold the heading and Control Z to hold the altitude.. At this point you can hit (P) for pause. Now You're probably wondering why we are using
NAV1 for a VOR and not an ILS. Well, if we're on a longer flight it might be a while before we need the ILS so we can make better use of NAV1
. Look at the OBI 2 (V2)
gauge. what you want to do is adjust the top number till the needle centers and it says 'from' near the bottom of the gauge. Whatever number the needle centers on is the radial from the JFK VOR
that you are currently flying. The next step is to take your pencil (so you can erase) adn ruler and draw a straight line from the center of the circle representing JFK's VOR
and make sure it passes through the radial you are flying. Draw the line out a few inches. Now do the same thing with OBI 1 (V1)
gauge. Adjust the needle till it centers and the word 'from' is at the bottom. The position it centers at is the inbound radial to the Deer Park VOR. It will probably be around 270 or so. Take
the number the needle for V1 centered at, and draw a line from the Deer Park VOR
circle out through the radial you are flying. Again, draw the line out a few inches. You 'll now have 2 lines which you can erase. The point at which the lines intersect is your exact location. This will work as long as you are in range of 2
VOR's which most of the time will be the case. there are other more advanced forms of navigation like global positioning, but our default Cessna isn't equipped with it.
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