When asked for an operation code, use the following:

           Day Code               Day Code
           --- ---------------    --- --------------
            1  JEB STUART          9  ATTLEBORO
            2  LE LOI             10  NEVADA EAGLE
            3  WHITE WING         11  MAGON
            4  SILVER BAYONET     12  HENDERSON HILL
            5  PEGASUS            13  MASHER
            6  MUSCATINE          14  CEDAR FALLS
            7  LAMSTON            15  STARLIGHT
            8  MAMELUKE THRUST    16  JUNCTION CITY