document this:   - pkg/obcs:     add code to read OB?eta from a file via obcs_prescribe_read: the code     compiles and does not destroy any other experiments, the data is read     properly, and the values show up properly in the results, but the     code is not tested in actual applications, so handle with care
document this:
  - pkg/obcs:
    add code to read OB?eta from a file via obcs_prescribe_read: the code
    compiles and does not destroy any other experiments, the data is read
    properly, and the values show up properly in the results, but the
    code is not tested in actual applications, so handle with care

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h