National Geographic : 1997 Feb
< JUNE 1974 Probing under the ice, oceanographer Gennady Kadachigov moves among forma tions typical of the Arctic Ocean. As very cold, dense brine seeps down from the ice, the surrounding seawater is cooled and freezes to form these stalactites. This bizarre icescape had strategic value dur ing the Cold War: Because sonar is of limited use in such conditions, both U.S. and Soviet subma rines could generally avoid detection. A APRIL 1955 Rolling out the bull dozers - essential equipment for any drift station -Soviet scientists unload cargo from a supply plane. After a hiatus in World War II, the Sovi ets swarmed over the Arctic during the Cold War, launching hun dreds of missions be tween 1950 and 1991. < JANUARY 1989 Making snowballs for science, ice physicist Victor Morosov of AARI uses an ice press to study the snow on drift station SP-28, as colleagues use a drill to test ice thickness. Although the first CD-ROM atlas from the Gore-Chernomyr din Commission is composed of oceano graphic data, a sub sequent atlas will contain ice data from drift stations and spy satellites.