BUOY 4562 



Buoy 4562 (Figure C-19, C-20) 

 was launched from an aircraft on 

 15 August (227) at 59-1 3N, 

 60-1 8W. It entered the Ice Patrol 

 operations area on 26 November 

 (330) when it passed south of 

 52°N and transmitted data 

 throughout the remainder of 1987. 

 The drogue sensor indicated 

 drogue detachment on 24 October 

 (297), 70 days after the buoy's de- 

 ployment. 



For the first 28 days (15 August- 

 1 1 September (227-254)) after its 

 deployment, 4562 moved to the 

 southeast, mostly between the 

 200 m and 1000 m isobaths. The 

 speeds were in the range of 20 to 

 55 cm/s, while the temperature 

 remained nearly constant (4-5°C). 

 On 13 September (256), 4562 

 moved onto Hamilton Bank into 

 water that was too shallow for the 

 buoy's drogue. It remained in that 

 vicinity for about 57 days, during 

 which it moved slowly, with fre- 

 quent direction changes. About 

 halfway through this period (3 

 October (276)) the temperature 

 record shows an abmpt decrease 

 in temperature (3°C over 

 18 hours). 



The remainder of 4562's south- 

 ward movement occurred well 

 inside the 1000 m isobath 

 (3 days). The buoy speeds varied 

 widely (0 to 35 cm/s), while the 

 temperature decreases slowly but 

 persistently from 3°C to 0°C. 



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