Retired Navy Rear Adm. George Adam Lange, 74, a combat veteran of World War II, died Monday at Bethesda Naval Hospital.

His last assignment was head of the administrative branch of naval communications in the Office of the Chief of Naval Operations here, from June, 1952, until retiring in July, 1955.

Adm. Lange was executive officer on the U.S.S. Potomac, President Roosevelt's yacht, and was a White House aide when the Japanese attacked Pearl Harbor in 1941.

He and the yacht's commanding officer were immediately summoned to the White House to establish and organize the President's war room. After that assignment was completed, he requested transfer to combat duty.

Adm. Lange then served in the South Pacific from mid-1942 until the end of 1945. He participated in operations in the northern Solomon Islands area and in the invasion of Leyte and received a number of decorations.

After the war, he was with the office of naval intelligence here until 1949, and later commanded a hospital ship and an attack transport.

Born in Meriden, Conn., Adm. Lange attended Catholic University before his appointment to the Naval Academy at Annapolis, where he graduated in 1927. He saw duty in Nicaragua during the rebellion there.

Adm. Lange was a former member of the Army and Navy Club and of St. Bartholomew's Catholic Church in Bethesda.

He is survived by his wife, Estella K., of the home in Bethesda, and a sister, Julia Kreiger, also of Bethesda.