What does the VOR compass rose indicate?

The VOR compass rose is a crucial navigational feature found on VOR (VHF Omnidirectional Range) radio navigation aids. It indicates the radial courses available to pilots when navigating from or to the VOR station. Each radial is referenced in degrees, measured clockwise from true north, allowing pilots to determine their position relative to the station and to track specific courses efficiently.

When pilots are using the VOR, they can select a radial to fly toward or away from the station, which is essential for maintaining orientation during flight. The compass rose serves as a visual representation of these radials, with each one signifying a specific magnetic course. This function is fundamental for instrument navigation, particularly in conditions where visual references are limited.

The other options do not accurately represent the primary purpose of the VOR compass rose. It does not provide information on flight time, airspace restrictions, or altitude limits, which are governed by different regulatory and navigational tools. Therefore, option C accurately describes the VOR compass rose as it highlights its role in guiding pilots along specific radial courses.