▁the ▁State ▁Sh ip , ▁M V ▁B amb ra ▁to ▁Wy nd ham , ▁where ▁they ▁were ▁gu ided ▁by ▁M . P . ▁Dur ack ▁to ▁a ▁point ▁on ▁Rose wood ▁station ▁near ▁Arg yle ▁Down s ▁close ▁to ▁the ▁ 1 2 9 th ▁mer id ian ▁east ▁longitude ▁( 1 2 9 ° ▁east ). ▁They ▁used ▁the ▁relatively ▁new ▁technology ▁of ▁the ▁day , ▁wireless ▁radio ▁time ▁signals , ▁and ▁other ▁methods ▁to ▁fix ▁a ▁position ▁for ▁the ▁Northern ▁Territ ory ▁border ▁with ▁Western ▁Australia . ▁ ▁These ▁early ▁determin ations ▁led ▁to ▁the ▁ 1 9 6 8 ▁agreement ▁for ▁the ▁formation ▁of ▁Survey or ▁Gener als ▁Cor ner . ▁ ▁The ▁W A ▁border ▁is ▁not ▁straight ▁( see ▁Western ▁Australia ▁border ); ▁at ▁the ▁ 2 6 th ▁parallel ▁south ▁( 2 6 ° ▁south ) ▁there ▁is ▁an ▁approximately ▁ 1 2 7 ▁met re ▁" side ways " ▁section ▁of ▁the ▁W A / NT ▁border , ▁which ▁runs ▁east - west . ▁ ▁H yman ▁Sol omon ▁Sp ig l ▁Cur le w is ' s ▁successor ▁as ▁Government ▁Astronom er ▁was ▁H yman ▁Sol omon ▁Sp ig l ▁between ▁ 1 9 4 0 ▁and ▁ 1 9 6 2 . ▁Sp ig l , ▁who ▁was ▁from ▁a ▁surve ying ▁background , ▁progress ed ▁re building ▁a ▁post ▁war ▁rav aged ▁Observ atory ▁by ▁re ju ven ating ▁the ▁time ▁service , ▁se ism ology ▁services , ▁comple ting ▁the