1985. The drift tracks of the 

 TODs will be discussed below In 

 chronological order according to 

 when they were deployed. The 

 number in parenthesis following 

 dates are Julian dates and 

 correspond to the dates on 

 Figure C-1 . 



TOD #4526 



TOD #4526 was deployed on 1 

 April (1 00) in the Flemish Pass in 

 position 46°15.6'N 46°28.8*W 

 (Figure C-1). Between 11 April 

 and 3 June ( 1 54) , only one 

 position was received from TOD 

 #4526. This position on 26 May 

 (1 46) at 47°35.4'N 44°1 5.0'W 

 indicated TOD #4526 drifted 

 north around Flemish Cap. From 

 3 June (1 54) to 7 June, TOD 

 #4526 drifted from 46°48.6'N 

 44°07.2'W in a southwesterly 

 directbn at an average velocity of 

 27 cm/s until it entered the North 

 Atlantic Current. On 7 June 

 (158), the sea surface 

 temperature reading from TOD 

 #4536 increased from 3°C to 5°C. 

 Although TOD #4526 briefly 

 drifted north of the IIP region 

 between 7 July (1 88) and 1 1 July 

 (192), the drift track of TOD 

 #4526 after 7 June corresponds 

 well with the isotherm pattern as 

 depicted by the Canadian 

 METOC SST charts (Figure C-3). 

 An average velocity of 51 cm/s 

 was maintained while TOD #4526 

 was in the North Atlantic Current 

 until exiting the IIP region to the 

 east on 22 July (203). 



During June when TOD #4526 

 was drifting north of Flemish Cap 

 in the North Atlantic Current, the 

 8°C isotherm apparently indicated 

 the westem edge of this branch 

 of the North Atlantic Current. 

 TOD #4526 continued to return 

 data as it drifted across the 

 Atlantic until its failure on 5 

 October. Throughout the period 

 from 3 June until 5 October, the 

 drogue sensor indicated the 

 drogue was disconnected. 



58 



Figure 0-2. Velocity distributions for International Ice Patrol's 

 1985 TODs 



Figure C-2a 



TOD VELOCITY DISTRIBUTIONS 



£| 



o 

 o 



25 - 



20 .. 



15 .. 



10 .. 



5 •■ 



— TOD 4526 

 TOD 4541 



TOD 4548 



— TOD 4529 



10 20 30 40 50 60 70 80 90 10 110 

 VELOCITY CM/S 



Figure C-2b 



TOD VELOCITY DISTRIBUTIONS 



— TOD 4536 

 TOD 4550 



— TOD 4527 

 TOD 4544 



10 20 30 40 50 60 70 80 90 100 110 

 VELOCITY CM/S 



