the computed currents obtained from the 

 density distribution. Seven drogues were set 

 and tracked during an eighteen hour interval. 

 The second cruise of the CGC EVERGREEN 

 was designed to more clearly delineate the ex- 

 tent of the atypical oceanographic conditions 

 that were observed on the Grand Banks during 

 the first cruise. It began on 22 May 1966 with 

 the occupation of station 9552 located south 

 of the Gulf Stream directly south of the "Tail- 

 of-the-Banks." Again, the cruise proceeded 

 northward and was terminated on 7 June 1966 

 with the occupation of station 9654 near South 

 Wolf Island, Labrador. In all, seven sections 

 consisting of 103 stations were occupied to 

 delineate oceanographic conditions between 

 the "Tail-of-the-Banks" and Cape Farwell, 

 Greenland. Station and section locations are 

 shown in Figure 3. Several of these sections 

 correspond to all or part of the Standard Sec- 

 tions established by the Coast Guard Oceano- 

 graphic Unit to monitor time variations in the 

 area. On Standard Section 1, open and scat- 

 tered winter ice was encountered near South 

 Wolf Island, Labrador. At the other end of the 

 section, near Cape Farwell, storis was en- 

 countered in concentration from five-tenths to 

 ten-tenths, which prevented the occupation of 

 the easternmost of the planned stations and the 

 last station occupied was actually taken in the 

 ice. 



Additional Projects 



A Very Low Frequency navigation system 

 was constructed using three ECCO Model 

 880-A VLF receivers, a CTC Electronics, Inc. 

 rubidium frequency standard, and a power 

 supply for the frequency standard. During the 

 first cruise it was planned to compare both the 

 VLF navigation system and the Loran-C sys- 

 tem using a fixed reference point at sea. Unfor- 

 tunately neither the Loran-C nor the VLF 

 navigation system functioned properly. 



A very short project to determine messenger 

 travel time was conducted. This was done using 

 a Model 250 Finger manufactured by Ocean 

 Research Equipment, Inc. that was tripped by 

 a messenger dropped by the bottom bottle of 

 the cast. When tripped, the pinger i-eversed 

 and ceased to operate. Only two tests were 

 conducted because of the heavy weather. These 

 tests showed messenger speeds of 184 and 191 



meters/minute for a 1200 meter, 13 bottle cast, 

 with wire angles less than 25°. 



The United States Coast Guard cooperated 

 with the National Oceanographic Data Center 

 in Project HOTLINE. The National Oceano- 

 graphic Data Center was conducting a year's 

 systems evaluation (Project HOTLINE) to 

 determine if real-time data processing is feasi- 

 ble. The International Ice Patrol sent processed 

 data from 103 stations to the National Oceano- 

 graphic Data Center via the Coast Guard 

 Oceanographic Unit. This data consisted of a 

 corrected temperature, corrected salinity, a 

 sigma-t value for each depth, and a dynamic 

 height value (based on 1000 decibar reference 

 level) for each station. These data were col- 

 lected using STD or Nansen casts and were 

 processed by computer within 24 hours after 

 they were collected. 



The CGC EVERGREEN also provided cor- 

 rected temperature and depth information to 

 the Fleet Numerical Weather Facility, Mon- 

 terey, California from each station. This in- 

 formation was transmitted from the ship for 

 relay to the Fleet Numerical Weather Facility. 

 The Fleet Numerical Weather Facility used 

 a special computer program to prepare a sea 

 surface temperature chart for International 

 Ice Patrol. This chart was developed for a 

 63 X 63 grid with two diff'erent scales. The 

 area covered was the Grand Banks and con- 

 tiguous regions. The Fleet Numerical Weather 

 Facility transmitted this chart to the Fleet 

 Weather Facility in Suitland, Maryland who 

 in turn hand-carried it to the Coast Guard 

 Oceanographic Unit. This project will be con- 

 tinued during the 1967 International Ice 

 Patrol. 



Instrumentation 



Teflon-lined Nansen bottles, manufactured 

 by the Ballauf Mfg. Co. or the United Machine 

 Co., were used during each cruise. Tempera- 

 tures were measured with protected deep sea 

 reversing thermometers manufactured by 

 Richter & Wiese, G. M. Mfg. Co., Kahl Scien- 

 tific Instrument Corp., and Walter H. Kessler 

 Co. Inc. Thermometer performance was con- 

 tinually monitored by pairing and intercom- 

 parison. 



Depths of observations were based on wire 

 angle geometry and thermometric computa- 



