Table 2.2 The distribution of guiding modes (hours)
===================================================
   SI      IN      EC      GY      CT      FL Total
  WFP  17.150   2.309   5.956   0.000 175.872 201.287
  FOC   1.667   0.000   0.000   0.000   4.488   6.155
  FOS   2.572   0.000   1.284   0.000  56.203  60.058
  HRS   9.345   0.000   0.012   0.000  17.932  27.290
  FGS   0.000   0.000   0.000   0.000   0.129   0.129
Total  30.734   2.309   7.252   0.000 254.624 294.918
    %  10.421   0.783   2.459   0.000  86.337 100.000
-----------------------
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 may
not be accurate.