mv old new
This command is used to rename objects in the data file. In this case, the object "old" will be renamed "new". A note of caution: the name is changed only in the object record itself, not in any member records. Thus if the object "old" appears as a member of any other object, the name will not be changed there. To rename all occurrences of an object, use the "mvall" command.
Examples:
mv test hull
mv g00 air
mv g1 turret