cussed in Appendix C.) It drifted 

 in an easterly direction along ttie 

 north side of the front at an aver- 

 age speed of 12 cm/s until 9 April 

 (99) when the temperature in- 

 creased from about 0.8°C to 

 2.8°C in one day. Buoy 4543 

 accelerated to 47 cm/s from 9 

 April through 19 April (109). After 

 19 April, it moved in a northerly 

 direction at 31 cm/s until it became 

 entrained in an anticyclonic (warm 

 core) eddy north of Flemish Cap 

 on 8 May (128). Based on the 

 buoy trajectory, the eddy was 

 centered near 50°N 46°W and had 

 no substantial translation. The ap- 

 proximate diameter of the eddy as 

 defined by the buoy track was 95 

 km. Buoy 4543 averaged 40 

 cm/s while completing five loops of 

 the eddy. It departed the eddy on 

 25 June (175) and drifted north- 

 easterly, passing east of 39°W 

 (the eastern boundary of the Ice 

 Patrol operations area) on 14 July 

 (195). The drogue sensor indi- 



46 



cated the drogue remained at- 

 tached throughout the period 

 described atx3ve. As of 30 

 September 1986, buoy 4543 was 

 still transmitting as it moved 

 eastward across the North Atlan- 

 tic. 



4542 



Buoy 4542 was used twice during 

 1986. The two deployments are 

 referred to as 4542(a) and 

 4542(b). 



Buoy 4542(a) was deployed by an 

 HC-130 on 16 April 1986 (106) in 

 the Flemish Pass in position 

 47°01.1'N 47°19.7'W (Figure B- 

 1b). It drifted south with the Lab- 

 rador Current at an average speed 

 of 32 cnVs until 25 April (115) 

 when it encountered an oceanic 

 front. It drifted in an easterly di- 

 rection at an average speed of 63 

 cm/s along the front until 30 April 

 (120). On that date, 4542(a) 



turned northwest, still along the 

 front, and drifted at 46 cm/s until 

 recovered by USCGC EVER- 

 GREEN on 3 May (123). 



Buoy 4542(b) was redeployed 

 from EVERGREEN on 5 May 

 1986 (125) in the Flemish Pass in 

 position 46°58.2'N47°18.5'W. It 

 drifted south along the bathymetry 

 at 37 cm/s until encountering the 

 front again on 11 May (131). It 

 then moved easterly along the 

 front at an average speed of 53 

 cm/s until 13 May (133) when it 

 turned north and slowed to 8 cm/s. 

 Drifter 4542(b) was recovered by 

 EVERGREEN on 17 May (137). 

 The drogue remained attached to 

 drifter 4542 throughout both 

 deployments, and this fact was 

 accurately reported by the drogue 

 sensor. 



