How duty time works (and why it needs OOOI)

KármánLogs can track your duty time and rest against the limits for your operation, and it does most of the work for you. The one thing to know up front: your duty time is built entirely from your OOOI times. If a flight is missing them, it will not count.

What duty time is in KármánLogs

Your duty time is the clock from when you report for duty to when you are released, counting every flight in a single duty period. KármánLogs assembles that from your logged flights, then measures it against the duty and rest limits for your regulation on the Reports page. When several flights run back to back, they are grouped into one duty period; a long rest between them, about ten hours by default, starts a new one.

It needs your OOOI times

Duty time will not calculate without OOOI. A flight needs both an OUT time and an IN time, or KármánLogs cannot place it on the duty clock.

Your duty clock is anchored to two of your four OOOI times:

• OUT (block out, leaving the gate): your duty period starts a set number of minutes before this.
• IN (block in, parking at the gate): your duty period ends a set number of minutes after this.

Your OFF and ON times, takeoff and landing, drive night, takeoff, and landing logging, but they are not what the duty clock runs on. See how OOOI times power automatic logging.

Because OUT and IN are the anchors, a flight missing either one cannot be placed on the duty clock, so KármánLogs quietly leaves it out. There is no error message; the flight simply drops out of your duty period, rest, and next-legal-duty figures. If your duty time looks empty or too low, the fix is almost always to enter the missing OUT and IN times.

Set the minutes before and after (every airline is different)

Duty rarely starts exactly at OUT and ends at IN. It starts when you report and ends when you are released, and every operator defines those differently. An hour of report time is common, but yours might be 45 minutes, or two hours. You set both, so the math matches your company.

1. Open Settings and tap Duty Time under Compliance.
2. Under Duty Time Calculation, choose Minutes Before First OUT (15, 30, 45, 60, 90, or 120 minutes; the default is 60).
3. Choose Minutes After Last IN (15, 30, 45, or 60 minutes; the default is 30).

The screen restates your choice in plain language: your duty period starts that many minutes before your first OUT and ends that many minutes after your last IN. As the setting itself says, adjust them to match your company's policies. Every duty calculation updates the moment you change them.

If you would rather work in exact clock times, you can: when you record an explicit on-duty or off-duty time for a period, KármánLogs uses that instead of the before and after buffer.

Where your duty time shows up

Turn on Show Flight Duty Times in the same settings screen. The Flight Duty Times section then appears on the Reports tab whenever you have recent Part 91, 91K, 121, or 135 flights logged. There KármánLogs shows your time used against the 24-hour, weekly, monthly, and yearly limits for your regulation, the rest you are required to have, and the earliest time you can legally start your next duty period.

While you are in the duty settings, choose the options for your Part (91, 91K, 121, or 135) and, where it applies, your Crew Size, so the limits and rest math match how you actually fly.

Common questions

My duty time is blank or too low. Why?

Almost always because one or more flights are missing their OUT or IN time. A flight without both is left off the duty clock. Add the times and it appears.

Which OOOI times matter for duty?

OUT and IN. Your OFF and ON times are used for night, takeoff, and landing logging, not for the duty clock.

Can I use exact report and release times instead of the buffer?

Yes. The minutes-before and minutes-after values are the default. If you record an explicit on-duty or off-duty time for a duty period, KármánLogs uses that exact time instead.

KármánLogs duty and rest tracking is a planning aid, not a compliance authority. Always follow your operator's duty and rest policies and the current regulations for your operation.

Still need help? Email support@karmanlogs.com.