Which units can be selected for the display of target altitude, speed, and range?

• A. English
• B. English or Metric
• C. Metric
• D. SI Units

Answer: (B)

The display is designed to be flexible by letting you choose between two measurement systems, English or Metric. That matters because target altitude, speed, and range are read in different units depending on regional practice or mission requirements. With English, you’d typically see altitude in feet, speed in knots, and range in nautical miles. With Metric, those would shift to meters, kilometers per hour (or m/s in some setups), and kilometers. Being able to switch between these two systems keeps all three measurements consistent in a single chosen system, reducing the chance of misreading numbers and making the display more usable for crews from different backgrounds.

Choosing only one system would limit compatibility, and sticking strictly to SI units isn’t as common for aviation displays where nautical miles and knots remain standard in many contexts. So allowing English or Metric covers the standard ways these three values are presented in practice.