Multiple choice

A ___ shows the GS of the airplane.

  1. GPS

  2. VOR

  3. ILS

  4. GS

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GPS (Global Positioning System) directly calculates and displays ground speed by measuring position changes over time. VOR and ILS are navigation aids that don't inherently display speed. GS (Ground Speed) is the value being measured, not the instrument showing it.