De Long was unaware, as he prepared to sail, that the U.S. Coast and Geodetic Survey was studying the latest hydrographical and meteorological data obtained from its research ships in the Bering Sea.
De Long var uvidende, da han var rede til at sejle, at U.S. Coast and Geodetic Survey studerede de nyeste hydrografiske og meteorologiske data fra sine forskningsskibe i Beringshavet.