Which term is associated with lines of latitude in navigation?

• A. P-static
• B. Parallels
• C. PAPI
• D. PAR

Answer: (B)

Lines of latitude describe how far north or south you are, and they circle the globe in east-west directions without converging. Because these lines run parallel to the equator and to each other, they’re called parallels. In navigation, you use latitude (parallels) together with longitude to specify a precise location on the Earth’s surface.

The other terms relate to different aviation concepts: one is a sensor for static pressure used in air data systems, another is a runway approach lighting and guidance system, and the last is a type of radar used during approaches. None of these describe lines that measure north-south position, which is the role of parallels.