Of course, overcast skies can prove a serious annoyance, since they hide a navigator's celestial reference points. This holds true whether you're just trying to observe the sun for a project or a sailor lost at sea in the Northern Atlantic. While the overcast skies of Day Two did present a conundrum for the crew during the orientation phase, the Celestial Tracking team enjoyed mostly clear skies throughout the rest of the voyage, offering no further interference with their project.