Retired Navy Rear Adm. Albert A. Wellings, 73, who served on Adm. William Halsey's staff in the Pacific during World War II and was head of the mine counter-measures desk at the Bureau of Ships when he retired from active duty in 1956, died of a heart ailment March 22 at his home in McLean.

After retiring from the Navy, he spent two years with the Chrysler Corp., where he worked on missile projects. From 1958 until retiring a second time in 1971, he was a member of the weapons systems evaluation group at the Institute for Defense Analyses in Arlington.

Adm. Wellings was a native of Boston and a 1932 graduate of the U.S. Naval Academy at Annapolis. He attended the Navy's postgraduate school there and in 1941 earned a master's degree at Harvard, where he studied electrical engineering.

During the 1930s, he served aboard destroyers and battleships. After the war, he commanded a destroyer and held a staff position with the Pacific Fleet. He joined the Bureau of Ships in 1953.

Survivors include his wife, the former Muriel Williams of McLean; a son, Albert Jr. of Lexington, Ky.; a daughter, Julie L. Wellings of Ojai, Calif.; a brother, retired Navy Rear Adm. Joseph H. of Newport, R.I., and two sisters, Gladys W. Askin of Upton, Mass., and Eileen W. Roche of Baltimore.