failure, the electrical connectors, having their own O-ring seals, 

 would continue to function. Thus flooding of one housing would not 

 affect the transmission of data which originated at another station. 



The combination of a sensor housing with sensors and adjacent 

 DAT shells is referred to as a Station. Station 4 is fabricated from 

 6A14V Titanium and contains one thermistor, one pressure trans- 

 ducer, and one tensiometer. Station 3 is fabricated of Hard-Anodized 

 6061-T6 Aluminum and contains one thermistor. Station 2 uses 

 6A14V Titanium and contains a thermistor and a pressure transducer. 

 Station 1 is fabricated of 316 Stainless Steel. The different materials 

 were used in order to obtain engineering data applicable to future 

 design problems. Certain design changes to save weight and to per- 

 mit faster assembly and leak checking would be incorporated in a 

 later design. 



3.1.7 Outer Mooring Cable (Vector Cable Co., Dwg. B-3540) 



The outer mooring cable is a polyethylene-jacketed torque-balanced 

 wire rope which has been used in many oceanographic applications. 

 It is laid up using 41 galvanized high-strength steel wires in three 

 layers around a . 045" core wire. The first and second layers are 

 right lay, with six . 040" and twelve . 040" wires, respectively. The 

 outer layer is left-hand lay, with twenty-two . 031" wires. The wire 

 rope diameter is .265". The .050" wall polyethylene builds up the 

 outside diameter to .365". Cable weights per 1000 feet are 160 lbs. 

 in air and 114 lbs. in water. Ultimate strength is nearly 10, 000 lbs. 

 Cable stretch was measured to be 1.16 feet per 1000 feet per 1000 lbs. 

 tension. 



Torque-balanced wire rope was chosen to minimize rotation during 

 lowering of the anchor. Rotation might induce hockling at implant- 

 ment or whenever tension might slacken due to dynamic conditions. 

 Synthetic lines were avoided to prevent potential fish bite damage. 

 It remains to be seen whether or not the torque balanced construction 

 has adequate strength for the oscillatory fatigue loads. 



Rope terminations are swaged 304 Stainless Steel clevis fittings 

 (ACCO P/N MS-20667-9) except at the bottom where the cable must 

 interface with chain. There a swaged drop-forged steel eye fitting 

 is used (MACWHYTE P/N RA 152-9). A neoprene boot is molded 

 to the fitting and sealed over the polyethylene jacket with internal 

 O- rings. This boot provides strain relief and seals the wire rope/ 

 swaged fitting interface against sea water penetration. To minimize 



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