OK, on the Casio there are 4 rows and 4 columns of function buttons above the number keypad. You want the one which is second column in from the left, second row up from the bottom. It'll probably be labelled o ' ''
To add 3 hours 10 to 2 hours 55, enter 3, press the DMS key, enter 1, enter 0, press the the DMS key. Press the + sign. Enter 2, press the DMS key, enter 5, enter 5, press the DMS key. Press the = button.
To convert 136 degrees and 37 minutes of longitude into time, enter 1, enter 3, enter 6, press the DMS key, enter 3, enter 7, press the DMS key. Press the divide button, enter 1, enter 5, press the = button.
Easy, isn't it?
Paul
[ 02 September 2001: Message edited by: Paul Hickley, Gen Nav Spec, Oxford ]
[ 02 September 2001: Message edited by: Paul Hickley, Gen Nav Spec, Oxford ]