Which time base is used for logbook entries?

Which time base is used for logbook entries?

• A. Zulu time
• B. Local time
• C. EST
• D. CST

Answer: (A)

The main concept is that logbook entries use UTC, known as Zulu time, as the standard time reference. This universal baseline keeps times unambiguous when flights cross time zones, cross DST changes, or when reviewing records long after a flight. Recording takeoff, landing, and duty times in Zulu avoids the confusion that local times (like EST or CST) would create and ensures consistency with flight plans, ATC, and maintenance records. Zulu time aligns with the global aviation standard, making it the appropriate choice for logbook entries.

The main concept is that logbook entries use UTC, known as Zulu time, as the standard time reference. This universal baseline keeps times unambiguous when flights cross time zones, cross DST changes, or when reviewing records long after a flight. Recording takeoff, landing, and duty times in Zulu avoids the confusion that local times (like EST or CST) would create and ensures consistency with flight plans, ATC, and maintenance records. Zulu time aligns with the global aviation standard, making it the appropriate choice for logbook entries.