Table 2.2 The distribution of guiding modes (hours)
===================================================
   SI      IN      EC      GY      CT      FL Total
  WFP  14.133   1.237   6.443   0.000 145.068 166.881
  FOC   0.833   0.000   0.108   0.000   8.368   9.309
  FOS   3.892   0.000   0.181   0.000  48.913  52.986
  HRS  28.276   0.000   3.498   0.000  40.391  72.165
  FGS   0.000   0.000   0.014   0.000   0.096   0.109
Total  47.134   1.237  10.242   0.000 242.836 301.450
    %  15.636   0.410   3.398   0.000  80.556 100.000
-----------------------
SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
%  = Percentage

Note:

Since the engineering telemetry is missing frequently because of the
failure of tape recorder 2, correct determination of the status of GS
Acquisitions is sometimes impossible.  Therefore, the above statistics
might be inaccurate.