 The rank structure for the officers serving in the Colonial Fleet  are as follows: OFFICERS: Admiral, Commander, Colonel, Major,  Captain, Lieutenant, Lieutenant (junior grade), Ensign. ENLISTED:  Master Chief Petty Officer, Chief Petty Officer, Petty Officer (1st,  2nd Class), Specialist, Deck Hand, Recruit. there are also Marines  aboard Galactica which conform more closely to the traditional  enlisted Marine ranks, with Sergeants, Sergeant