I need to add aircraft takeoff and land times in a 24 hour (military) format
to come up with flight hours in a decimal format across days (the date itself
is not important).
Example:
Takeoff 2231 to land 0138 the next morning is 3.1 hours of flight time and
would look like this:
T/O LAND Hours
2231 0138 3.1

The tenths of hours are standard flight time accounting and go like this:
0-5 min= .0, 6-11 min= .1, 12-17 min= .2, 18- 23 min= .3, 24-29 min= .4,
30-35 min= .5, 36-41 min= .6, 42-47 min= .7, 48-53 min= .8, and 54-59 min= .9.

I'll be using Excel 2002 to do this, if it can be done at all. Thanks in
advance.