sate 
rosette array would serve to determine the strain field in the ice g with 
knowledge of the elastic parameters this could be translated to the stress 
field e 
Implications for future research 
The use of stations on drifting pack ice as bases for geophysical 
and oceanographic studies of the Arctic Ocean proved hishly successful. The 
work done under this contract included the first U. S. geophysical studies 
from pack ice stations and showed that the stations set up by the U. S. 
Air Force were suitable for detailed precise studies of the Arctic Ocean 
environment. Instruments of considerable size and complexity were used for 
the first time in the Arctic Ocean, included among these new instruments were 
a precision depth recorder, a nuclear resonance magnetometer, an all-sky 
camera, a submarine bottom camera, an Askania magnetic variometer, a - 3 
microbarovariograph and a long-period seismograph. All these instruments 
functioned and added greatly to our knowledge of the Arctic Ocean 
environment - crust, sea, ice and atmosphere. 
Future research should emphasize continued areal geophysical 
coverage of the Arctic Ocean. The ice station is probably the best platform 
for deep sub-bottom reflection soundings. Many questions about the extent 
of the deep reflector observed by Crary and from Alpha are still unanswered. 
The change along the strike of the Alpha Rise in record characteristics, 
from the single deep reflector on the east to multiple reflectors in the 
east to multiple reflectors in the west is unexplained. Probably fathograms 
made from Atomic submarines will furnish more rapid surveillance of bottom 
topography but the fathograms from ice stations furnish a study in detail 
of a particular area. Furthermore, the fathogram furnishes a unique method 
for the determination of the velocity of the floe over the bottom. Still 
