Which CFR (Code of Federal Regulations) covers aircraft speed?

CFR 91.117 specifically addresses the operations concerning aircraft speed. Within this regulation, it outlines the maximum speeds for various altitudes and situations, including the requirements for flying at or below specific altitudes and during approach to airports. The regulation emphasizes the need for pilots to adhere to these speed limits to ensure safe operations in airspace, particularly in the vicinity of airports where compliance with speed guidelines is crucial for maintaining separation between aircraft and ensuring overall safety.

The other regulations mentioned in the choices focus on different aspects of aviation. For instance, CFR 91.115 discusses the operations of aircraft in formation flight, while CFR 91.119 concerns minimum safe altitudes over congested areas and open water. CFR 91.122 outlines the requirements for obtaining air traffic clearance for certain operations. Each regulation serves its specific purpose, but in the context of aircraft speed, CFR 91.117 is the relevant guideline.