How do you log your trips? Do you log each leg per line in your logbook? Each aircraft per line? Or one line per day?

Up until now I have been creating a new line for each aircraft swap. However, I noticed because of the rounding conversion of hours to tenths, the totals in my logbook for the entire day or trip can be a tenth or two off from what the actual trip key says. Not sure yet exactly how much off my logbook is from the last year, but I’m estimating at least 10hrs difference from what the company has on file.

Example below:

Day 1
Aircraft 1: 1hr34min = 1.6hrs logged
Aircraft 2: 1hr42min+1hr52min = 3.6hrs logged
Aircraft 3: 40min = .7 logged
Adding totals in logbook: 1.6+3.6+.7= 5.9 logged

Total for day: 5:48hrs would equal 5.8hrs on file with with company

.1 difference for this day

For this one day trip there would be a .1 overage in my logbook compared to what the airline would have on record. This could add up into a large discrepancy over time. Im curious to what others do and if you have any suggestions on fixing it.

Thanks