MICHIGAN CITY, Ind. - Capt. Matthew Sibley (left), commander of Coast Guard Sector Lake Michigan, in Milwaukee, Wis., congratulates Rebecca Polzin, a native of Preston, Minn., and officer-in-charge of Coast Guard Station Michigan City, Ind., after her advancement to senior chief petty officer, Feb. 1, 2012. As officer-in-charge, Polzin ensures the 19 enlisted active duty members and 7 enlisted Coast Guard reservists at Station Michigan City carry out their missions of search and rescue; maritime law enforcement; ports, waterways, and coastal security; and marine environmental protection. U.S. Coast Guard photo by Seaman Kody Felthoff.