You can log flight hours in different modes and with different accuracy:


Mode

Default, flight times are logged in Hours-Minutes  ( e.g. 1:30 ).  Select the "I log flights in Decimal Hours" option on the Settings – App General page to log flight times in decimals ( e.g. 1,5  or  1.5 )


Notice that, regardless of your selection, PILOTLOG always stores flight times as minutes in the database!  When decimal logging mode is selected, flight times are rounded to the nearest decimal for on-screen display and for paper printing (logbook and reports) only!


e.g.  

You log a flight from 23:40 until 02:15.  This flight is saved in the database as 155 minutes.  If you run PILOTLOG in Hours-Minutes, the flight is displayed and printed as 1:35 . If you selected Decimal Hours, the same record is displayed and printed as 1.6 hours.



Accuracy

By default PILOTLOG stores flight times with the highest accuracy.  This may cause discrepancies in the page subtotals and the grand totals,as illustrated here :


You log a flight from 08:00 to 08:14, and another flight from 10:00 to 10:38. The flights are saved in the database as 14 minutes and 38 minutes, regardless of your settings. Running the software in hours-minutes mode, the totals at the bottom of the page nicely show 52 minutes.  
Now, printing the same logbook in decimal hours, the first flight is printed as 0.2 hours and the second flight shows 0.6 hours. Totals at the bottom of the page are based on 52 minutes, which converted to the nearest decimal returns 0.9 hours...



By default, PILOTLOG achieves the highest possible accuracy.  In the sample above, 0.9 hours is more accurate than 0.8 hours, even though it looks weird.  If you do not want that, you can change the accuracy for flight time recording on the Settings – App General page.  



The available options depend on the Mode that is selected, as follows :


You log hours in Mode
Records are saved Precise (default)
You can choose to save 
with lower accuracy
Hours-Minutes
Precise
(Highest Accuracy - 1 minute)
Rounded (Clock Marks - rounded to nearest 5 minutes)
Decimal Hours
Precise
(Highest Accuracy - 1 minute)
Rounded (Decimals - rounded to nearest 6 minutes)



e.g. You log a flight from 10:20 until 10:37


You log hours in Mode
When saved precise
When saved less accurate
Hours-Minutes
Record is saved as 17 minutes
Flight is printed as 0:17

Flight Time for each flight matches the OUT-IN times.

Page Totals match with the sum of all Flight Times on the page
Record is saved as 15 minutes
Flight is printed as  0:15

Flight Time is rounded and does not match the OUT-IN times

Page Totals match with the sum of all Flight Times on the page
Decimal Hours
Record is saved as 17 minutes
Flight is printed as 0.3

Flight Time (in decimal format) for each flight matches the OUT-IN times

Page Totals may not match with the sum of all decimal Flight Times on the page, deviations up to 0.2 are possible.
Record is saved as 18 minutes
Flight is printed as 0.3

Flight Time (in decimal format) for each flight matches the OUT-IN times

Page Totals match with the sum of all Flight Times on the page.



Changing the setting from Precise to Less Accurate, or changing the Mode from H:m to H.h does not modify or update the records that are already in the database.  The settings for accuracy applies only to new record added to the database, or when records are updated.


Note :  our statistic show a deviation up to 200 hours on a full pilot career when systematically rounding the hours to a lower accuracy.