What action does the term 'Buster' command aircrew to perform?

The term 'Buster' commands aircrew to fly at maximum continuous speed. This directive is significant in various operational scenarios where speed may be critical, such as in response to a threat, during emergencies, or to expedite mission execution. When pilots receive this command, they understand that they need to push their aircraft to its limits in terms of speed, while still maintaining safe operation parameters and avoiding damage that could arise from exceeding the aircraft's capabilities for extended periods.

In other contexts, the alternatives do not represent what 'Buster' indicates. The emphasis on strategic speed or low altitude addresses different flight maneuvers that wouldn’t necessarily call for the urgency expressed by 'Buster.' Flying only during daylight involves considerations about visual flight rules but does not relate to the speed directive inherent in the term. Thus, the specific broad application of 'Buster' in aviation terminology is well-captured by the instruction to achieve maximum continuous speed.