Describe the 'standard rate turn'.

The standard rate turn is defined as a turn that achieves an angular change of 3 degrees per second. This rate enables an aircraft to complete a full 360-degree turn in exactly two minutes, which is vital for maintaining safe separation between aircraft and ensuring that turns can be made predictably and efficiently within controlled airspace. Pilots and air traffic controllers rely on this standardization for consistency in communication and operations.

The other options do not accurately describe the standard rate turn; for instance, a turn rate of 5 degrees per second would complete a 360-degree turn in just over a minute, which is too fast for a standard rate. Similarly, a turn rate of 1 degree every 10 seconds equates to a much slower rate, and a turn rate of 90 degrees every minute would also not align with the standard definition, as it would roughly translate to a rate of only 1.5 degrees per second. Understanding the correct definition is essential for successful navigation and communication in aviation contexts.