anchor cable. This led to a wire angle of 50° which 

 affected the depth of the meters to an unknown 

 extent, although they continued to operate. The 

 current meters were successfully recovered at the 

 end of the experiment. The results are shown in 

 figure 6. In this figure the tangential and normal 

 components are oriented with the isobaths with the 

 normal component in a direction of 140°T and the 

 tangential component in a direction of 050 °T. With 

 such a short observational record it is difficult to 

 analyze the current. However, it is important to 

 note the high velocity of the normal component 

 starting at 1500Z on the 28th. Calculations of the 

 currents from oceanographic stations do not show 

 this current. 



SUBSURFACE CURRENT 

 METER ARRAYS 



In 1974, three current meter arrays were 

 deployed in the Ice Patrol area. Figure 7 illustrates 

 the array design used on these deployments. 

 Depths represent the shipboard fathometer 

 readout and were not corrected for the actual 

 speed of sound. 



The first array was deployed in position 

 44°42.7'N, 48°54.9'W in 1344 meters. The CGC 

 EDISTO (WAGO-284) was the deployment plat- 

 form with LCDR A. H. LITTEKEN, Jr. on board 

 as Field Party Chief. The array was streamed from 

 the forecastle using the anchor last method. The 

 two EG&G Model 850 current meters were 

 switched on at 1845Z 11 February 1974 and the 

 array was set at 1945Z 11 February 1974. With 

 this depth of water, current meter number 253 

 would have been 794 meters below the surface and 

 current meter number 229 would have been 1294 

 meters below the surface. This array was retrieved 

 on 8 April 1974 by the CGC EVERGREEN 

 (WAGO-295). Current meter number 253 had 16 

 days of good data. Current meter number 229 

 contained no usable data since the compass 

 readings were all zeros. The plot of the data from 

 253 is shown in Figure 8. 



The second array was deployed by the CGC 

 EVERGREEN in position 44°42.6'N, 48°58.0'W 

 in 1124 meters. Current meter number 252 was set 

 661 meters below the surface and was switched on 

 at 1750Z on 8 April 1974. Current meter number 

 301 was set 1092 meters below the surface and was 

 switched on at 1801Z 8 April. The array was 

 retrieved by the CGC EVERGREEN on 12 June 

 1974. Unfortunately, neither current meter 

 produced usable data. The tape did not advance on 

 252 and the speeds read all zero on 301. 



The third array was deployed by the CGC 

 EVERGREEN on 13 June 1974 in 1131 meters of 

 water in position 44°41.7'N 48°55.0'W. Current 

 meter number 254 was set 560 meters below the 

 surface. Current meter number 300 was set 1071 

 meters below the surface. This array was also 

 streamed from the buoy deck using the anchor last 

 method. The anchor was let go at 0435Z 13 June 

 1974. This array was recovered by the CGC 

 EVERGREEN at 1730Z on 12 April 1974. The 

 tape on current meter number 254 was unreadable. 

 The record on current meter 300 at first appeared 

 to contain good data. However, further processing 

 showed that this record could not be interpreted. 



PERSONNEL 

 IIP 1-74, Phase I 



LCDR A. H. Litteken, Jr.-Field Party Chief 



Mr. R. M. Hayes-Asst. Field Party Chief 



LTJG D. T. Jones 



MST1 B. R. Peters 



MST1 M. F. Alles 



ET2 W. S. Krug 

 Phase II 



Mr. R. M. Hayes-Field Party Chief 



LTJG D. T. Jones-Asst. Field Party Chief 



MST1 B. R. Peters 



MST1 M. F. Alles 



MST2 R. H. Schultz 

 IIP 2-74, Phase I and II 



LCDR R. W. Scobie-Field Party Chief 



MSTC W. E. Heller- Asst. Field Party Chief 



ETC W. T. Lewis (Phase I only) 



MST1 B. R. Peters (Phase II only) 



MST1 M. F. Alles (Phase II only) 



MST3 J. S. Small 



MST1 J. H. Campbell, Jr. 



ET3 L. A. Haney 



OFF-SEASON CRUISES 



Data from off-season cruises were sent to 

 Commander, International Ice Patrol for his use in 

 predicting the coming Ice Patrol season. The CGC 

 CHASE occupied Standard Section A2 in March 

 1974. The CGC SHERMAN occupied Standard 

 Section A4 in October 1974. These data follow the 

 CGC EVERGREEN data. 



DATA 



The data presented in the Tables of 

 Oceanographic Data are from the listings provided 

 by the National Oceanographic Data Center 

 (NODC), Washington, D.C. Standard and signifi- 

 cant values were computed by the Oceanographic 

 Unit and submitted to NODC (NODC Cruise No. 

 31-8370.) 



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