GREEX on a Honeywell r)DP-516 computer or 

 a Dietzgen ilodel 7410-PA programable cal- 

 culator with programs developed at CGOU. 

 Dynamic height computations relative to a 1000 

 decibar reference level of no motion were made 

 on a DDP-516 computer at CGOU upon receipt 

 of station and quality control data from the field. 

 The computer programs utilized are described 

 by Hislop (1973). 



During the second cruise, data processing was 

 accomplished at sea on DDP-516 computers. 

 Dynamic heights at all Ice Patrol stations were 

 transmitted to Connnander International Ice 

 Patrol on a real-time basis to assist in the predic- 

 tion of iceberg drift. 



Dynamic Calculations in Shallow Water 



Dynamic heights for stations where the water 

 depth was less than 1000 meters were calculated 

 in a manner similar to that described by Helland- 

 Hansen (193-1:). Isosteric surfaces between tlie 

 ocean-sediment interface and the 1000 meter ref- 

 erance surface were assumed to extend hori- 



zontally from the interface into the continental 

 slope. In etlect, the continental slope under a 

 shallow station was assumed to be motionless 

 water. The method is described in detail by 

 Kollmeyer et al. (1967). 



Navigation 



Navigation during all cruises was based on 

 information from Loran-A, Loran-C, UQX^ 

 fathometer, and satellite navigation (navsat). 

 Poor A'isibility as a residt of excessive fog rou- 

 tinely precluded celestial navigation, and poor 

 loran coverage in certain areas of the Grand 

 Banks region often reduced fix accuracies to as 

 low as ±5 miles or more. 



Data 



The data presented in the Tables of Oceano- 

 graphic Data (Appendix A) are reproduced 

 from computer cards supplied by the National 

 Oceanographic Data Center (XODC Cruise No. 

 31-8245). 



