You miss the point. Hovering with a visual reference is relatively easy be it day or night. Hovering at night in still wind with the rotor downwash "appearing " to give the impression that you are moving back and left because it is blowing away from you can be very disorienting. Until you have done it in foggy conditions with no normal hover references and the doppler having unlocked because it cannot resolve all the different vectors thrown up by the downwash you haven't lived!! This is what the oil companies will expect you to do if they get rid of the standby boats.