What terms are used to describe the quality of braking action?

"Good, fair, poor, nil" are the terms commonly used in aviation to describe the quality of braking action on runways. These terms are standardized and provide a clear understanding of the runway's condition as it relates to braking performance.

'Good' indicates that aircraft can achieve a high level of braking efficiency and that the runway surface is in excellent condition. 'Fair' suggests that while braking is still effective, it may not be as reliable as under 'good' conditions, potentially due to minor surface issues such as moisture or debris. 'Poor' indicates significant limitations, where braking capability can be compromised, often due to conditions like ice, snow, or water pooling. 'Nil' signifies that there is virtually no braking action, which poses a high risk for landing and requires immediate action to divert or implement alternative procedures.

The other choices do not reflect the standardized vocabulary used in aviation for reporting braking action, which is critical for safety and operational planning.