The finding that all types of anomalies of interest could not be
detected using a single wavelength resulted in the addition of
the ability to automatically cycle among a set of preselected wavelengths.
The addition of the ability to cycle was dependent on the
development of automated gain profiles. The number of wavelengths
used for cycling was eventually restricted to three as users
had difficulty following more than three wavelengths. The ability
to tap on the display to start and stop cycling facilitated the acceptance
of the cycling option.