navigational fixes divided by the total number of intervals. In 

 this report, average interval velocity is used as the true water 

 speed. 



As shown in the drogue tracks, all 5-meter and most 25-meter 

 drogues tended to rotate in a clockwise direction, usually in elliptical 

 patterns. Good examples of this rotational effect can be seen in 

 Figures 17 and 20. The deeper drogues, those at 50- and 100-meter 

 levels, did not show as much rotational movement as those at 5 meters. 

 They did move, however, in the same clockwise direction (Figs. 17 

 and 18). This rotation is a direct result of the tidal activity 

 in the area. 



At 5 meters, relatively slow current speeds were observed at 

 the northernmost launch sites, 1 and 4. At the other three sites, 

 drogue speeds at 5 meters were considerably faster. Drogue speeds 

 at sites 1 and 4 were about 19 cm/sec. At site 2, slightly to the 

 south, a speed of 24.5 cm/sec was observed, and at the southernmost 

 sites, speeds were near 32 cm/sec. 



At 25 meters, a flow similar to that at 5 meters was observed. 

 The drogues launched at sites 1 and 2 moved at about 20 cm/sec, and 

 speeds at the southernmost sites were greater than 23.5 cm/sec. The 

 25-meter drogue at site 4 lost its parachute before any usable data 

 were obtained. 



Conversely, the 50-meter drogues at the northernmost sites had 

 the higher speeds. The water speed at site 1 was 25 cm/sec and 

 at site 4 was 35.5 cm/sec. The latter speed was the highest observed. 

 Speeds at sites 2 and 5 were 15 and 23 cm/sec, respectively. At 

 site 3, the 50-meter drogue lost its parachute and was not recovered. 



The lowest speeds (about 14 cm/sec) were found at 100 meters 

 at sites 2, 4, and 5. No 100-meter drogue was released at site 1, 

 and the one launched at site 3 was lost. 



Generally, the drogue speeds at the three southern sites were 

 highest at the surface and decreased with increasing depth. The 

 drogue speeds at the northern sites were lower at the surface and 

 increased with depth to 50 meters. Slow water speeds were observed 

 at 5 and 100 meters at site 4, but a faster speed was indicated at 

 50 meters. 



3. Current Meters . A current meter array was used for a lunar 

 cycle of 28 days to relate current speed and direction, tides, and 

 phases of the moon. A mooring site was selected 2 miles northeast 

 of San Nicolas Island (Fig. 2). The array, illustrated in Figure 4, 

 had the upper sensor at a depth of 30 meters and the lower sensor 

 just above the bottom at 55 meters. Upon retrieval of the meters, 

 the films were removed and sent to Geodyne Corporation for processing. 



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