 Relinquishing his position with the Navy Office in 1962 , Becher was sent to the United Kingdom as Head of the Australian Joint Services Staff in London . In January 1964 he returned to Australia , and was made Flag Officer Commanding HM Australian Fleet . During his time in this role Becher became embroiled in the controversy that followed the collision of HMA Ships Voyager and Melbourne , which took place in February that year . Prior to giving evidence before the Royal Commission that had been established to investigate the incident , Becher had discussed events with Melbourne 's Commanding Officer , Commander Ronald Robertson . The discussion became public knowledge , and led to suggestions of conspiracy . Becher stated to the commission that Melbourne should have questioned Voyager 's final movements ; his evidence is alleged to have influenced the Royal Commissioner , Sir John Spicer , to place a degree of blame on Robertson . In 1965 , Becher assumed his final command as Flag Officer @-@ in @-@ Charge East Australia Area , before retiring from the Royal Australian Navy on 6 March 1966 . 
