Under the command of Lieutenant Commander John Jackson , DSC , RNR , Swale moved 6,000 metres ( 6,600 yd ) astern of the doomed Aymeric .
Under the command of Lieutenant Commander John Jackson , DSC , RNR , Swale made ASDIC ( sonar ) contact .
Under the command of Lieutenant Commander John Jackson , DSC , RNR , Swale moved 6,000 metres ( 6,600 yd ) astern of the doomed Aymeric and made ASDIC ( sonar ) contact .