_______________________________________________________________________
Angle            Vertical component  Error as %
of lean (degree) as % of true ht.    of true ht.
_______________________________________________________________________
          5         99.62              0.4
          6         99.45              0.6
          7         99.25              0.8
          8         99.03              1.0
          9         98.77              1.2
         10         98.48              1.5
         11         98.16              1.9
         .         .                        .
          .         .                        .
          .         .                        .
         18         95.10              4.9
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