The ranks of commissioned officers in the Coast Guard are, from highest to lowest, Admiral Chief of Naval Ops (also known as Commandant of the Coast Guard), Vice Admiral, Rear Admiral Upper Half, Rear Admiral Lower Half, Captain, Commander, Lieutenant Commander, Lieutenant, Lieutenant Junior Grade and Ensign.
The ranks of enlisted men are Chief Warrant Officer 4, Chief Warrant Officer 3, Chief Warrant Officer 2, Master Chief Petty Officer of the Coast Guard, Command Master Chief Petty Officer, Master Chief Petty Officer, Senior Chief Petty Officer, Petty Officer 1st Class, Petty Officer 2nd Class, Petty Officer 3rd Class, Airman, Fireman, Seaman, Airman Apprentice, Fireman Apprentice, Seaman Apprentice and Seaman Recruit.
The Coast Guard is one of the five branches of the United States Military. It was created by an act of Congress on August 4, 1790. Its chief duties are to secure the coastline of the United States, enforce the laws of the sea, interdict drug traffic, and conduct search and rescue missions.
As of 2014, the Coast Guard is part of the Department of Homeland Security, and its commandant is Admiral Paul F. Zukunft. In the past, it was part of the Departments of Transportation, Treasury and the Navy.