If there is no access to a ``gdiff'' or ``xdiff'' utility, the alternative method will work well. Compare each routine (one at a time) in OLD_UPDATES to the corresponding one in MOM_3_OLD to find local changes. Do this using ``diff'' with the ``-e'' option. As an example, take the file ``grids.F'' and use the command
diff -e MOM_3_OLD/grids.F OLD_UPDATES/grids.F > mods
Inspect the file ``mods'' to view local modifications which have been made. While viewing file `mods'' in an editor, open another editor and look for each modification in file OLD_UPDATES/grids.F. Find the corresponding location in file NEW_UPDATES/grids.F and use the ``cut and paste'' method to transfer the local modifications.