SectionalSprint.

Ridge Valley training chart

Original sectional-style illustration · educational use only
CHART LAB
Illustrative aviation chart with airspace markingsOriginal training illustration. A blue dashed Class D boundary on the left, a magenta solid Class C boundary to the upper right, airport frequency CTAF 122.8 near the center, restricted area R-4401 in the lower right, and a 2500 MSL annotation. 28SFC — 2840 / SFC North Ridge1,228WILLOW LAKEVALLEY ROADRIVER CROSSINGR-4401RESTRICTED RIDGE FIELDCTAF 122.8METROTWR 119.42500 MSL
Dashed blue boundary

Tap a chart feature to inspect its label.

Fictional airport, airspace boundaries and R-area. Not an official chart; not for flight planning or navigation. Always consult current FAA charts, NOTAMs and authorizations.
Quick practiceQuestion 1 of 5
0 answered
Class D

What does the dashed blue line indicate?

Study the highlighted chart feature first.

Keys 1–4 answer · N next

Why learn through a training diagram?

SectionalSprint teaches FAA chart-reading concepts with an original schematic, not a substitute for a current sectional. All 20 questions are independently written and linked to relevant FAA study or chart guidance. The diagram illustrates symbol conventions but does not depict real airspace. For operational decisions, use the FAA Chart Users’ Guide, remote pilot guidance and official current resources. Your practice results stay in your browser’s local storage and are not transmitted to us.