Yes night/limited visibility ops can be replicated. Reduce the "manual" visibility to whatever distance you feel is attainable for your mission, taking into account moonlight, cloud cover, and/or other ambient light sources. Leave your thermal sight capability on.
btw, there is also a good cpx description of a limited visibility recon scenario. It is in the AAR section on the tacops page. Unfortunately, I do not recall the name of that specific report. Perhaps James Sterrett or one of the other participants could give you more info on that.
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Semper Fi,
Pete
mar03