Which of the following is not a data option displayed on the HSI in the described avionics setup?

• A. Bearing to ADF
• B. Bearing to VOR waypoint
• C. Directions to the closest gym
• D. Bearing to GPS waypoint

Answer: (C)

This question tests what kinds of navigation data the HSI can display. An HSI shows bearing information to navigation sources that are part of aviation nav databases and flight plans. Bearing to an ADF gives the direction to an NDB beacon, and bearing to a VOR waypoint provides the direction toward a VOR-defined point or a published waypoint. Bearing to a GPS waypoint shows the direction from your current position to the selected GPS waypoint. These are all standard nav data that the system can present to help you steer.

Dire ctions to the closest gym, however, isn’t a navigational datum used by aviation systems. Gyms aren’t navaids or aviation waypoints stored in navigation databases, so the HSI wouldn’t display a bearing to a gym. That makes it the data option that wouldn’t appear on the HSI.