. ▁▁ ▁On ▁ 2 5 ▁March ▁ 1 9 4 4 , ▁Ch oud h ri ▁was ▁promoted ▁to ▁acting ▁lieutenant - comm ander ▁and ▁given ▁command ▁of ▁the ▁mines we eper ▁H M IS ▁R oh il k and . ▁On ▁ 1 ▁September ▁ 1 9 4 4 , ▁he ▁was ▁promoted ▁to ▁substant ive ▁lieutenant - comm ander , ▁the ▁first ▁Indian ▁to ▁become ▁a ▁substant ive ▁senior ▁line ▁officer ▁in ▁the ▁R IN . ▁He ▁participated ▁in ▁the ▁Pacific ▁theatre ▁against ▁the ▁ ▁Imperial ▁Japanese ▁Navy . ▁On ▁ 1 0 ▁February ▁ 1 9 4 5 , ▁he ▁was ▁promoted ▁to ▁acting ▁commander ▁and ▁assigned ▁to ▁the ▁s loop ▁H M IS ▁God av ari ▁as ▁its ▁executive ▁officer . ▁In ▁the ▁ 1 9 4 5 ▁B irth day ▁Hon ours ▁List , ▁he ▁was ▁appointed ▁a ▁Member ▁of ▁the ▁Order ▁of ▁the ▁British ▁Empire , ▁Military ▁Division ▁( MB E ). ▁He ▁witness ed ▁the ▁Japanese ▁surrender ▁in ▁ 1 9 4 5 ▁and ▁commanded ▁a ▁naval ▁division ▁that ▁consisted ▁of ▁the ▁two - ship ▁formation ▁that ▁represented ▁the ▁Royal ▁Indian ▁Navy . ▁After ▁the ▁war , ▁Ch oud h ri ▁served ▁on ▁the ▁Ar med ▁Forces ▁National isation ▁Committee , ▁and ▁was ▁promoted ▁to ▁acting ▁captain ▁in ▁July ▁ 1 9 4 7 . ▁ ▁In ▁ 1 9 4 7 , ▁Ch oud h ri ▁served ▁on ▁the ▁committee ▁that ▁was ▁involved ▁in ▁the ▁division ▁of ▁the ▁R IN ' s ▁assets ▁between