NavList:

 Tony,

Not knowing what programing language you would use I will talk in general terms.

Let DD equal your decimal degrees   DD=123.4567

Then use the function that gives you the interger of a number     D=INT(DD)

Subtract the interger from the decimal degrees    MMSS=DD-D

then multiply the remander by 60       MM=MMSS*60

You will now have D degrees and MM minutes ( with decimal minutes)

D=123      MMSS=DD-D=.4567     MM=MMSS*60=27.4

123 degrees  27.4 minutes

If you need seconds do the same thing again.

This does not deal with negative numbers but with some logic ( ie. if DD is less than 0 than .... ) you can multiply by -1 or take the absolute value or ...

This is only one of doing it.  Brad probobly hav a different way.

Hope this helps

John H.