What type of briefing should a pilot request to supplement mass disseminated weather data?

A supplemental briefing is specifically designed to provide additional details to complement existing weather information. It is used when a pilot needs more current or specific information that is not covered by the mass disseminated weather data. This type of briefing allows pilots to access targeted insights, such as significant weather changes or specific conditions that affect their planned route.

In contrast, an outlook briefing is generally more broad and focuses on expected weather developments over a longer timeframe, while an abbreviated briefing is a concise version that might miss out on pertinent details the pilot needs. A follow-up briefing usually occurs after receiving an initial briefing and is intended to update the pilot on any changes since the first consultation. The supplemental briefing fills the gap effectively, giving pilots more detailed insights into their weather situation.