Which type of weather briefing should a pilot request if departing within the hour and no preliminary weather information has been received?

A standard briefing is appropriate for a pilot who is preparing to depart within the hour and has not received any preliminary weather information. This type of briefing provides comprehensive and current weather information, including forecasts, significant weather changes, and any adverse conditions that may affect the route of flight.

By obtaining a standard briefing, the pilot ensures they have a complete overview of the weather conditions expected during the flight, including temperature, visibility, wind direction and speed, and any anticipated changes during the flight duration. This helps in making informed decisions about flight safety and route planning.

Other types of briefings serve different purposes. For example, an outlook briefing focuses on weather conditions expected beyond a 2-hour period, which wouldn't be helpful for immediate departure needs. An abbreviated briefing is typically used when the pilot only needs to refresh or verify information, and may not provide the thoroughness required for a flight about to start. A terminal area forecast briefing is specific to the airport vicinity and may also not encompass broader route information, making it less suitable for a pilot needing comprehensive data right before departure.