DATE      START    END      REG      C/T  TYPE   FILTER
 5 December 80   1551     1553     2810      ON   L        -60    
                 1553     1559      "        "    V        -60    
                 1600     1606      "        "    V        +60    
 11 December     1653     1655     2826      ON   L        -60
                 1658     1702      "        "    V        -60
                 1703     1707      "        "    V        +60  
 17 December     1608     1611     2840      ON   L        -60  
                 1613     1617      "        "    V        -60
                 1618     1622      "        "    V        -90
                 1622     1627      "        "    V       -120
                 1627     1631      "        "    V       -150
                 1632     1636      "        "    V        +60
                 1636     1640      "        "    V
                 1641     1645      "        "    V        -60
                 1648     1652      "        "    T        -60