322 THE BELT. SYSTEM TECHNICAL JOURNAL, JANUARY 1957 



shoal water the end of the cable was secured to a landing line and two 

 tractors took over the hauling. 



When enough cable was on shore to make the joint and the splice, 

 the barrels were cut away and Monarch weighed anchor and paid out 

 this section of double armored cable on the agreed route and buoyed off 

 the end. She then steamed over the proposed track to Terrenceville, 

 taking soundings and sea bottom temperatures as required, and an- 

 chored off Terrenceville on May 3. 



Preparations for landing the end were at once put in hand and the 

 ship's motor launches towed the end of the cable towards the cable land- 

 ing, the cable again being supported by empty oil drums. This end was 

 jointed and spliced to a piece of cable which had been laid previously 

 from the Terrenceville cable hut to a sand spit which juts across the 

 head of Fortune Bay, about a mile away. 



Upon completion of the splice, overall tests were made from the ship 

 to the Terrenceville cable hut, and all being well, paying out toward 

 the buoj^ed end off Sydney Mines was begun on May 4. 



The first repeater went over about two hours after the start of lajdng 

 and the others followed at approximately 4f hour intervals. 



On May 7 the cable buoy on the Sydney Mines end was recovered 

 and the end hove inward. After tests in both directions, the final joint 

 and splice were made. This operation was completed on ]May 9, and on 

 receipt of a signal that all was well. Monarch proceeded into harbor 

 at Sydney to land testing equipment, a spare equalizer and other 

 equipment. 



Equalization and Testiyig 



The cable had been loaded into the ship in repeater section lengths, so 

 cut that when laid at estimated mean annual sea temperature, the ex- 

 pected attenuation would be 60.0 db at 552 kc. A correction for the 

 change in attenuation of the cable when coiled in the factorj' tanks and 

 when laid in about 100 fathoms had been determined from tests on two 

 10-mile lengths of cable, laid off the Island of Skye. The correction 

 amounted to a decrease in attenuation when laid of 1.42 per cent. This 

 was essentially an empirical result, and as the mechanism of the change 

 was not fully understood, a possible further inaccuracj'' of equalization 

 might arise. 



Sea bottom temperatures along the route were obtained from informa- 

 tion supplied by the Fisheries Research Board of Canada, })ut unfor- 

 tunately, this information was rather meager ^nd varied considerably 

 with locahty. 



