It's possible. I've read that Captain Smith corrected one of his officers that was mistaking a star for a ships light but I forget which officer that was. It was a dark night so I think many mistaken sightings were made.Has anyone ever thought that these " mystery ships " could have been ice burgs that were mistaken as ships by there shapes , { this did occur from life boats towards the next morning hoping for rescue ) or that lights seen from the Titanic could have been light reflected back off ice burgs from Titanic's own lights