TM No. 327 



Table 5, Summary of Drogue Data - Transect k 



The study consisted of placing three surface (lO meter) drogues along an 

 approximate northvest-to-southeast line and about 2 kilometers apart. The 

 drogues were tracked for about 30 hours^ with position fixes taken at Intervals 

 as short as ten minutes „ The accuracy of the Decca Hi-Fix system in this 

 area was of the order of a few meters^ allowing very precise tracking „ 



These particular measurements were planned and conducted separately by 

 D, H. Shonting of NUGS in support of the overall study. A detailed analysis 

 is being made of these datajand results will be reported under separate cover 

 at a later time. Only the salient features of the drogue motion are discussed 

 here. 



The track plots of the three drogues are presented in figure 13= 

 sheets and the drogue history are included in appendix A. 



Data 



Drogue Kilo was tracked from llij-6 on 28 February to 1033 on 3 March, with 

 a temporary postponement of tracking from 12^5 on 1 March to 08l2 on 2 March 

 due to high winds. During the first six hours of tracking (ll46 to l824 on 

 28 February) Kilo moved north-northwest at an average speed of 17„1 cm/sec. 

 During the second six hours Kilo moved west then south at an average speed 

 of 6.8 cm/sec „ During the next 12 hours Kilo moved southward at an average 

 speed of 10„5 cm/sec, after which the tracking was delayed due to high winds. 

 The following day Kilo was located to the southeast of the initial starting 

 point (see figure 13), and at 123O on 2 March Kilo was east of the position 

 fix taken at 12^^ on 28 February. Kilo then moved north-northwest and later 

 northwest for the remaining time at an average speed of 12.6 cm/sec. 



The remarkable feature of the cyclonic motion exhibited by drogue Kilo 

 is the apparent symmetry^ which is indicated by the fact that after 1+8 hours 

 Kilo had nearly returned to the same position at which it was launched. 

 It is of further interest to note the similarity between the drogue track 

 from IIU6 to 182U on 2 8 Feb and that from 08l2 to 1628 on 2 March. 



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