Mackenzie was informed on 26 December 1962 that he would be appointed the Chief Polaris Executive ( CPE ) ; the term was henceforth used to refer to both the man and his organisation .
Mackenzie is the Flag Officer Submarines ( FOSM ) .
Mackenzie , the Flag Officer Submarines ( FOSM ) , was informed on 26 December 1962 that he would be appointed the Chief Polaris Executive ( CPE ) ; the term was henceforth used to refer to both the man and his organisation .