What is the latest time a pilot may land before last light according to CASA regulations?

The latest time a pilot may land before last light, according to CASA regulations, is specifically defined as 10 minutes prior to the official sunset. This regulation is in place to ensure that pilots maintain safe landing practices during diminishing light conditions. It allows for adequate time to successfully complete the landing while ensuring that the pilot is not landing in reduced visibility which could lead to increased risk of accidents.

Ten minutes prior to last light is enough time for a pilot to make adjustments or, if necessary, execute a go-around if the landing doesn’t proceed as planned. Understanding this timeframe is crucial because flying close to last light or landing too late increases the potential for encountering visibility issues while maneuvering for a landing, as well as complications that can arise with ground operations in low-light conditions.

While other options may suggest landing times that are closer to last light, they do not align with CASA's standard practices aimed at ensuring safety and adequate visibility for landings.