National Geographic : 1971 May
"How an Accutron watch helped me add 3,000 square miles to Greenland' My figures (recently verified by an earth-orbiting satellite) showed that Greenland is 3,000 square miles larger than it appears on the official map compiled from records of the early explorers. The old boys had obviously calcu lated their longitudes with watches that were slightly off. In those days there weren't any Accutron watches with tuning fork movements guaranteed accurate to within a minute a month.* Which leads me to believe (now that Greenland is safely behind me) that there may be other mis-mapped areas in the world. Say, in the nice, warm South Seas, perhaps? Accutron Date and Day "AG": Stainless steel case. Stainless steel link band with fold-over buckle.Black and white targetdial.Date can By David Humphreys, exact measure of time. An error of be reset instantly. Protected against common Explorer and Navigator only four seconds can misplace a mile. watch hazards. $185. Other styles from $110. *Timekeeping will be adjusted to this tolerance, If you et lost in northern Green- And at 50 below in the middle of the if necessary, if returned to Accutron dealer land, y die. six-month arctic night, you wouldn't from whom purchased within one year from All four of us in the expedition want to do a thing like that. knew it. Every dog in the team knew The old boys obviously didn't have it. Accutron watches To calculate our longitude we de- with tuning fork movements. pended on an Accutron watch. We used the most accurate watch As it turned out, there had been we could find because longitude is an quite a bit of misplacing. The watch that's become a scientific instrument. Accutronby Bulova.