All time entries in column 2 of MF1M-10 are made using what hour format?

The correct hour format for time entries in column 2 of MF1M-10 is the 24-hour format. This format, also known as "military time," provides a way to express time without the need for AM or PM designators, which can help eliminate confusion between morning and afternoon hours. It ranges from 00:00 (midnight) to 23:59 (one minute before midnight), making it particularly useful in aviation and meteorology contexts where precise time is crucial for operations and reporting.

Using the 24-hour format enhances clarity and ensures that all personnel, regardless of their background, interpret the time in the same way, which is critical in flight operations and weather forecasting. While military time and the 24-hour format are often used interchangeably, the term "military time" typically refers to the application of the 24-hour clock in military contexts. Hence, while "military time" could be seen as a similar concept, the most accurate term in a meteorological reporting context is the 24-hour format.

This helps ensure standardization and consistency across various forms of data and communication in aviation.