The drogue sensors indicated 

 the drogues were never attached 

 to the buoys, although the 

 drogues were attached when 

 deployed and are assumed to 

 have remained attached at least 

 through 1 August. TOD 

 deployment position selection is 

 based on the bcation of areas of 

 high iceberg concentrations and 

 areas of most unreliable drift 

 prediction. The analysis includes 

 data through 1 October 1 984. 

 The drift tracks of the TODs will be 

 discussed below in chronological 

 order according to deployment. 



TOD #451 1 was deployed on 22 

 March 1984 (Julian Date 082) 

 near the 200m contour at 

 48018"N50°00"W. This position 

 was about 1/2 mile south of the 

 sea ice edge. Its initial rrxjvement 

 was to the east at about 1 9 cm/s. 

 On 27 March (087). TOD #451 1 

 turned and rrwved nearly south 

 for five days onto the Grand 

 Banks (averaging 1 6.5 cm/s). 

 This was not the motion 

 anticipated. We had anticipated 

 the deployment position would 

 have placed TOD #451 1 in the 

 Labrador Current, but the TOD 

 motion indicated the deployment 

 position was south of the main 

 current stream. The movement 

 continued generally to the 

 southwest through the Avalon 

 Pass (with anticyclonic motion) at 

 an average velocity of 1 1 cm/s 

 until 1 July (192) near 46O03'N 

 54oorW. TOD #4511 then 

 moved generally north into St. 

 Mary's Bay and was picked up by 

 a fisherman on about 1 August 

 (214). (It was recovered by the 



54 



Canadian Coast Guard in late 

 October and was returned to the 

 International Ice Patrol.) 



TOD #4509 was deployed on 23 

 March (083) north of Flemish Cap 

 at49O53'N45O50'W. It drifted 

 with a slow cyclonic nnotion at an 

 average velocity of 1 1 cm/s until 

 21 April (11 2). It then began a 

 series of cyclonic and anticyclonic 

 motions centered about 40 km 

 south of its deployed position 

 that lasted until about 2 June 

 (154). TOD #4509 then travelled 



in a northerly direction at an 

 average velocity of 63 cnVs until 7 

 June (159). From 8 June to 28 

 September (160-272), it 

 remained trapped in an 

 anticyclonic eddy. The motion 

 was centered about 520N 46°W. 

 The radius of the nrration ranged 

 from 30 to 1 20 km at an average 

 velocity of 27 cm/s. Canadian 

 METOC sea surface temperature 

 (SST) charts do not indicate the 

 presence of an eddy near 520N 

 46oWforthe period TOD #4509 

 was moving anticyclonicaliy 

 (Figure B-3). 



57W 55 



52N 



39W 



42 -■ 



40N 



57W 56 



B-1a 



— t- 



55 



54 53 52 51 50 49 48 47 46 45 44 43 42 41 



— h- 

 40 



52N 



-■ 51 



-- 50 



-■ 49 



48 



-• 47 



46 



45 



42 



4 ON 



39W 



Figure B-1 . Drift Tracks for International Ice Patrol's 1 984 TODs. The • indicates the 

 deployment position. Tick marks on the drift tracks are 1 days apart. Note the eddies 

 contained in all of the drift tracks and the role of bathymetry in influencing the TOD motion. 



