stainless steel wire rope was used 

 to attach the parachute to the 

 surface assembly. Two 25-pound 

 cinder blocks were used to keep the 

 surface assembly upright, and four 

 blocks were used to lower and keep 

 the parachute at the desired depth. 

 Cinder blocks were found to have 

 the following disadvantages: (1) a 

 50 percent weight loss in water 

 requires that more blocks be used 

 to keep the array vertical; and (2) 

 with prolonged contact, the abrasive 

 surface of the blocks tends to cut 

 through the wire. Lengths of chain 

 were looped through the blocks to 

 prevent severing the wire. 



At hourly intervals, the ship 

 passed by each drogue and a Lorac 

 navigational fix was taken; however, 

 if the weather was good and the seas 

 calm, one drogue was chosen as a 

 reference point. A Lorac fix was 

 taken at that drogue every hour, and 

 radar ranges and bearings of the 

 other drogues were taken from the 

 fix. The drogues were tracked for 

 periods up to 48 hours. 



4. Current Meter . Two Woods 

 Hole Oceanographic Institution (WHOI) 

 current meters (Model A-100) , manu- 

 factured by the Geodyne Corporation, 

 were used in an anchored array 



(Fig. 4). The meters operated for 

 one lunar cycle of 28 days. The 

 meter is a self-contained, digital 

 recording instrument that measures 

 current direction and speed (Geodyne 

 Corporation, 1961) . 



5. Bottom Sediment . Kullen- 

 berg, PVC, and Phleger gravity 

 corers were used for collecting 

 bottom sediment samples. Short 

 cores were designated as grab 

 samples. The bottom samples 

 were shipped to the NAVOCEANO 

 geological laboratory for 

 analysis. 



RADAR REFLECTOR 



FLASHING LIGHT- 

 FLAO 



ALUMINUM POLE 

 STYROFOAM FLOA 



3/32" WIRE ROPE 



FIGURE 3. PARACHUTE- CURRENT DROGUE ASSEMBLY 



g3^. — VANE FOLLOWER 

 CAMERA 

 CAMERA MOTOR 



- TIMING CLOCK 



- COMPASS 



- ROTOR FOLLOWER 



I WHOI CURRENT METCWl 



—SUBSURFACE BUOY 



CURRENT METER 



RELEASE MECHANISM 



lAWWAVl 



FIGURE 4. CURRENT METER AND ARRAY 



