On Fri, 05 Sep 2003 03:41:50 -0000, Phil Verghese
wrote:

Oh I understand that. The chart can't always be to scale, that's why they
have the wiggly line symbol.

The wiggly line only tells you that the feeder route you're looking at
is substantially longer than depicted.

When we look at a map, our minds generally expect it to be to scale.
If the final approach course is 10 NM long, we will tend to (actually
should) use that segment as a "ruler" for situational awareness. That
2000' AGL tower 5 NM left of the FAC "looks" 5 NM away. Unfortunately,
the similar tower on the missed that takes us 10 NM away from the
airport might be closer than it appears on the chart.

The circle is =visually= telling us the limits. A simple statement
that "Not to scale beyond 10 miles" may be enough for you, but some
people want a picture. Ever notice that DPs and STARS are done both in
text and graphically?

Jepp does it a little different, but also uses some visuals. Charts in
mountainous terrain often have "Not to scale boxes". Jepp and NACO do
a number of things a little different. That's why some people like
Jepp and other NACO.

Mark Kolber
APA/Denver, Colorado
www.midlifeflight.com
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