What type of advisory should be issued if no braking action reports are available?

A braking action advisory is essential in situations where no braking action reports are available because it provides critical information in relation to runway conditions for pilots. This type of advisory is especially important during adverse weather conditions, such as snow, ice, or rain, which can significantly affect braking performance. By issuing a braking action advisory, air traffic control guides pilots regarding potential hazards, allowing them to make informed decisions about landing and takeoff procedures, and to prepare for reduced braking effectiveness.

When there are no reports available, this advisory serves as a precautionary measure, ensuring that all pilots are aware of the potential risks on the runway. It helps maintain safety in the airspace by encouraging vigilance and an understanding of possible challenges, leading to better overall situational awareness among flight crews.