If you want information regarding the airport or FBO services, which frequency should you call if both UNICOM and CTAF are available?

When seeking information regarding airport or FBO (Fixed Base Operator) services, the UNICOM frequency is the correct choice. UNICOM frequencies are typically used for non-towered airports where pilots can communicate with each other and with FBOs to request services such as fueling, parking, and other logistical support. This is beneficial for coordination among pilots and operators on the ground.

CTAF (Common Traffic Advisory Frequency) is primarily used for broadcasting intentions and maintaining situational awareness in the traffic pattern, rather than for services provided by FBOs or airports. Ground control and approach frequencies are utilized for managing ground movements and air traffic, respectively, and are not suitable for general informational requests related to FBO services. Therefore, using the UNICOM frequency ensures the pilot gets the necessary information pertaining to services at the airport.