49' 



48'^0' 



ICEBERG(a — a) 

 TOD 58m ( »-— o) 



205 jf^ 



205A2Z 



/ . 



202/I2Z 



202 /; 



'■20I/I2Z 



2oi^y 



200^ 



200/I2Z 



I99/2Z 



46°30' 



46° 



45° 



Figure D-3. Iceberg and TOD trajectories for Case II (1984) 



Case II 



This case is a 4.5-day 

 segment of an iceberg track 

 obtained in 1984 by USCGC 

 HORNBEAM. The test period 

 began17July(199)at1300Z 

 when HORNBEAM deployed a 

 TODdroguedat38m 

 approximately 500m from a 

 medium (120nnx1 15mx37rn) 

 pinnacle iceberg in the region 

 north of Flemish Cap. Although 

 the iceberg was rapidly 

 deteriorating, it was in the 

 medium size range (>60m) for 

 most of the drift period. Only in 

 the last 24-30 hours of drift was it 

 at or slightly below the 

 medium/small border. Hourly 

 iceberg positions were recorded 

 using radar ranges and bearings 

 and the HORNBEAM'S LORAN 

 position (Figure D-3). Hourly wind 

 speed arid direction were 

 measured using the shipboard 

 anemometer (Figure D-4). The 

 maximum separation between the 

 iceberg and the TOD was less 

 than 25km. 



Casein 



The third case is a 3.5-day 

 [27 -30 April 1985(117-120)] 

 trackof a medium 

 (75mx56mx18m) drydock iceberg 

 south of Flemish Pass obtained 

 by USCGC EVERGREEN. Over 

 the drift period, the target iceberg 



was deteriorating but only on the 

 last day of drift did it fall into the 

 upper part of the small range. 

 Again, hourly iceberg position 

 (Figure D-5) and wind data (Figure 

 D-6) were collected using 

 shipboard radar and anerTX)meter, 

 respectively. 



Figure D-4. Hourly wind vectors for Case II 



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