Not all points will contain all the data -- these, of 

 course, will only be given where we have stopped on 

 station. 



(4) If the detail of topography of the buried reflector is 

 deeper beneath the sediment than 50 feet, the roughness 

 will be generalized. 



(5) When "E" appears after any letter it means that the 

 data are estimated. 



(6) We expect to run into ice along the northern part of S^i 

 when we have to finish the survey owing to ice, or any 

 other conditions, we will terminate the last message with 

 "F." 



52 



