Lloyd T. Chalker, 97, a retired vice admiral in the Coast Guard who rose to be deputy commandant of that service during a career that spanned 43 years, died of pneumonia Thursday in a hospital in San Diego.

From 1935 to 1940, Adm. Chalker was chief of the Coast Guard. In January 1942, he was promoted assistant commandant and a year later was named deputy commandant. He held that post until his retirement in 1946. For a brief period during those years, he was acting commandant of the Coast Guard.

Adm. Calker was awarded the Legion of Merit for his service during World War II.

Adm. Chalker, who was born in Mobile, Ala., was a 1906 graduate of the U.S. Coast Guard Academy at New London, Conn. Before World War I, he served aboard revenue cutters in the Gulf of Mexico and the North and South Atlantic. He also sailed on three international ice patrols in the Bering Sea.

During World War I, he was stationed aboard the cruiser Minneapolis. After the war, he was navigator of the Navy Transport Von Steuben, which made seven round trips between New York City and Brest, France, returning troops to this country.

During the 1920s, he commanded destroyers and destroyer divisions and held several staff positions. From 1931 to 1934, he was the Coast Guard's chief of personnel.

Adm. Chalker lived in Chevy Chase for 33 years before moving to San Diego in 1968. For the past four years, he had lived with a granddaughter, Aline T. Walker, in San Diego.

His wife of 56 years, the former Aline Brooks Risque, died in 1964. In addition to his granddaughter, Adm. Chalker's survivors include a daughter, Beverly Hunter of San Diego, and four great-grandchildren.