Navigation Flashcards

A remote pilot notes that isogonic lines on a sectional chart show '10°E' variation. If the magnetic compass reads 270°, what is the true heading?

Answer: 280°

With 10°E variation, true heading = magnetic heading + easterly variation = 270° + 10° = 280°.

Which chart scale is most useful for detailed local navigation by a sUAS remote pilot?

Answer: 1:250,000 (terminal area chart)

Terminal area charts at 1:250,000 scale provide the greatest detail for operations near busy metropolitan airports.

What does a blue segmented line on a sectional chart typically represent?

Answer: Victor airway centerline

Blue segmented lines on sectional charts depict Victor airways, which are low-altitude airways centered on VOR stations.

A sUAS pilot wants to fly 5 miles north of the launch point. Using a sectional chart, approximately how many minutes of latitude must they travel?

Answer: 5 minutes

One minute of latitude equals approximately one nautical mile, so 5 nautical miles north equals approximately 5 minutes of latitude.

In GPS navigation, what does HDOP (Horizontal Dilution of Precision) measure?

Answer: The geometric quality of satellite positioning affecting horizontal accuracy

HDOP reflects how satellite geometry affects horizontal position accuracy; a lower HDOP value means better geometric spread and higher accuracy.

When a sUAS experiences compass interference from nearby metal structures, the pilot should primarily rely on which navigation method?

Answer: GPS-derived heading and position

GPS provides independent position and track information that is not affected by local magnetic interference from metal structures.

What information does a sectional chart legend provide regarding color-coded airspace?

Answer: The meaning of airspace class depictions, symbols, and chart features

The sectional chart legend explains the symbols, colors, and depictions used throughout the chart, including airspace class boundaries.