Instrument Rating Checkride Practice Test

What is the maximum service volume of a High Altitude VOR at 18,000 feet?

1. 40 NM

2. 100 NM

3. 130 NM

4. 25 NM

The correct answer is: 130 NM

The maximum service volume of a High Altitude VOR at 18,000 feet is indeed 130 nautical miles. High Altitude VORs are designed to provide navigation assistance for aircraft operating at higher flight levels, which is why their service volumes are greater compared to other types of VOR stations. At altitudes above 14,500 feet, the high altitude VOR can provide reliable navigation guidance up to 130 nautical miles, which is particularly important for en-route navigation as aircraft transition between different sectors and airspaces. This extended range also accounts for factors like terrain and altitude, ensuring effective communication and navigation across longer distances typical in high altitude operations. Other options listed do not reflect the correct capabilities of a High Altitude VOR at that level.