There are a lot of
lines on sectional charts. It's confusing to know which ones we must pay
attention to or not. This should help demystify those lines. Of course you
can look at the sectional chart's legend to see what the lines are but
that doesn't make it clear what they really mean to us.
Most lines are not
restrictive. Many are either land features (like powerlines), some are
cartographic like longitude lines or elevation lines, and the rest define
airspace of some sort.
These charts are
intended to supplement what's in Chapter 9 of the PPG Bible but can help
anyone better understand U.S. Aviation Sectional charts, a treasure of
information that sometimes can be buried a bit too well. Full resolution
versions of these will be used in an upcoming issue of Powered Sport Flying
reading the chart, each text balloon is answering the question "Can I
cross the line?"
Here's a good reason
to always get new charts. The Double Eagle airport does not now have a
tower. It will in the next issuance of the chart. Consequently, there will
be D airspace around it out to 5 miles. If you casually came in to fly
nearby and didn't have the new chart, you'd have no way of knowing you're
committing an FAR violation.