The GPS constant computes the ___ nearest airports. To call up the nearest airports in an emergency, press the ____ button on the GPS.

• A. 5, NXT
• B. 7, NRST
• C. 9, NRST
• D. 12, NXT

Answer: (C)

The GPS constant for computing the nearest airports is set to 9. This means that when using the GPS, it identifies and provides information about the nine closest airports to your current location. This is particularly useful in emergency situations, where quick access to the nearest airports is crucial for pilots needing to make informed decisions about landing options.

To call up this list of nearest airports during an emergency, the appropriate button to press on the GPS is the NRST button. This abbreviation stands for "Nearest," and by pressing it, pilots can quickly retrieve information about the closest available airports without having to navigate through multiple menus or options.

While the other choices might have mixed values for either the number of airports or the button function, the correct answer highlights the specific and accurate combination of nine nearest airports and the use of the NRST button for immediate access. This knowledge is essential for pilots to ensure safety and efficient navigation during critical situations.