encoding  utf-8
survey TK1986 -title "Tony Knibbs 1986"

  centreline
    units clino compass degree
    units length meter
    date 1986.01.01
    #declination -5.55 deg   #1986 dec -6.10 +0.55 Grid North
	declination -5.580 deg	# 1986.06.01 to Grid North http://www.geomag.bgs.ac.uk/gifs/wmm_calc.html  Oct 2011 
    data normal from to compass length clino

    flags duplicate
    1 2    154  4.35  -9.5
    2 2a  272  3.28  +10  
    2 3    0  2.77  DOWN
    3 4    096  3.63  -34
    4  5  091  7.26  -13
    5 6    019  1.95  -29
    6 7    104  8.68  -8
    7 8    100  6.10  +0
    8 9   109  10.25  -6
    9 10   115  1.70   -1
    10 11  139  8.40  -8
    11 12  143  5.53  -19
    12 13  163  4.50  -3
    13 14   230  6.00  -3
    14 15   197  4.88  -1
    15 15a  044  5.20  +24
    15 16  130  11.50  +0
    16 17   122  5.00  -1
    17 18  141  4.88  -7
    18 19  123  7.25  +0
    19 20  109  6.85  -4
    20 21  112  12.80  -11
    21 22  093  2.50  -10  
    22 23  113  4.75  -15
    23 24  106  10.45  -8
    24 25  096  3.90  -2
    25 26  104  13.55  -3
    26 27  079  4.437  -1
    flags not duplicate
    endcentreline
endsurvey