A4, A5, and A6 to provide a synoptic picture of the 

 Gulf Stream and Labrador Current systems. Sen- 

 ior scientist for the cruise was Mr. J. W. McGary, 

 Director of Oceanography, U.S. Coast Guard 

 Oceanographic Unit. The objectives of this survey 

 were : (1) to make a preliminary survey of sections 

 A5 and A6 to check the adequacy of the station 

 spacing and the sampling intervals and (2) to pro- 

 vide data on the Labrador-Gulf Stream system for 

 the first time in the fall season. The trackline for 

 the survey is shown in figure 2. Stations 1-19 in 

 the Gulf of Maine were stations requested by the 

 Bureau of Commercial Fisheries. The remainder 

 of the survey is listed in table 1 as A2-4, A3-10, 

 A4-3, A5-1, and A6-1. 



A total of 107 stations were occupied using the 

 Hytech 9006 in situ Salinity /Temperature/Depth 

 Sensor System (STD) to obtain continuous tem- 

 perature and salinity versus depth profiles from 

 the surface to 1,500 meters. Sections A6 and A5 

 were occupied first between 25 October and 3 No- 

 vember 1966. Then sections 2, 3, and 4 were occu- 

 pied, in that order. At three stations on A5 and 

 two on A6, Nansen bottle casts were made in addi- 

 tion to the STD lowering to obtain data below the 

 depth of 1,500 meters. However, these casts were 

 limited to 3,000 meters by the amount of wire 

 available. At all stations, one or two bucket tem- 

 peratures and salinity samples were taken as qual- 

 ity control checks on the STD performance. Up to 

 station 30, Nansen bottles were placed on the STD 

 cable at the surface and 1,495 meters to collect 

 calibration data. Results showed that temperature 

 and depth corrections were negligible, but the 

 STD salinity values were slightly lower than the 

 control samples. 



The analog traces of temperature and salinity 

 which were obtained were read by recording only 

 "standard" depth values and significant inflection 

 point values. The standard depths are in accord- 



ance with those recommended by the NODC in 

 publication M-2, "Processing Physical and Chem- 

 ical Data from Oceanographic Stations," Part 1A, 

 Coding and Keypunching Electronically Obtained 

 Serial Data (Provisional), May 1966 (see table 2). 



The processed and corrected data were tabulated 

 on the NODC-EXP-3167/40 (4/66) Form for 

 Reporting Electronically Obtained Serial Data 

 (Provisional) and delivered to the NODC for 

 archiving and the preparation of listings. The data 

 are listed by the NODC as Ref. No. 31-8007 and 

 as table IV of this report. 



The USCGC ROCKAWAY occupied section 

 A6 during the period 19 November-22 November 

 1966. Fifteen oceanographic stations were occu- 

 pied, each consisting of 15-bottle Nansen casts to 

 a depth of 1,500 meters or to within 50 meters of 

 the bottom when the water depth was less than 

 1,500 meters. These data are listed by the NODC 

 as Ref. No. 31-1061 and as table V of this report. 



DATA PRESENTATION 



The oceanographic station data for each cruise 

 are presented in this report as vertical cross- 

 sections of temperature, salinity, and solenoidal 

 volume flow. 



For the Gulf Stream-Labrador Survey in No- 

 vember 1966, the dynamic topography of the sea 

 surface relative to the 1,000 decibar surface is pre- 

 sented for each section by contouring the lines of 

 dynamic height between each station with a con- 

 tour interval of 0.02 dynamic meters (see figs. 3 

 and 4). The lines of equal dynamic height are not 

 connected between each section, as has been the 

 practice in the past, because it is realized that 

 these data are not synoptic in any sense of the 

 word. 



All physical data are tabulated in tables I-V 

 which are preceded by an explanation of the codes 

 used. 



Literature Cited 



Bush, A. J., J. E. Murray, and F. M. Soule, 1957. Interna- 

 tional Ice Observation and Ice Patrol Service in the 

 North Atlantic Ocean, Season of 1956, Bulletin No. 42. 



Helland-Hansen, B., 1934. The Sognefjord Section. Ocean- 

 ographic Observations in the Northernmost Part of the 

 North Sea and Southern Part of the Norwegian Sea. J. 

 Johnstone Mem. Vol. p. 257. Liverpool, 1934. 



Kollmeyer, R. C. et al., 1966. "Oceanography of the Labra- 

 dor Sea in the Vicinity of Hudson Strait in 1965," U.S. 

 Coast Guard Oceanographic Report No. 12, CG-373-12. 



NODC publication M-2, "Processing Physical and Chem- 

 ical Data From Oceanographic Stations," Part 1A, 

 Coding and Keypunching Electronically Obtained Serial 

 Data ( Provisional ) , May 1966. 



