Robert Hudson Jones, 97, who was the chief engineer for various Navy radar systems, died May 20 of heart disease at the Brooke Grove Rehabilitation and Nursing Center in Sandy Spring.

Mr. Jones spent more than 30 years as an electrical engineer for the Navy, beginning in 1943, when he completed graduate studies in radar technology at Harvard University and the Massachusetts Institute of Technology.

From 1946 to 1963, he designed radar systems for the Navy's former Bureau of Ships, rising to the position of head engineer. In that role, he helped design the radars used on the USS Enterprise and USS Long Beach, two of the Navy's first nuclear-powered ships, and helped develop electronic navigational aids.

He was chief engineer for pulse system techniques development at the Naval Ship Engineering Center from 1963 to 1972. From 1972 until his retirement in 1976, he was head of the three-dimensional radar systems integration section of the Navy's engineering center.

Mr. Jones was born in Independence, Mo., and attended Kansas City Junior College before completing his bachelor's degree in electrical engineering at the University of Missouri. From 1929 to 1932, he was a design engineer for General Electric in Schenectady, N.Y. He received a master's degree in electrical engineering from Union College in Schenectady in 1933.

From 1932 to 1943, he designed high-voltage power transformers for his father's engineering firm in Independence before moving to Washington. He was elected to four honorary societies for science and engineering and, from 1943 to 1946, served in the Naval Reserve.

Mr. Jones lived in Alexandria from 1943 to 1956 and in Rockville from 1956 to 1996. In recent years, he resided at the Brooke Grove Retirement Village in Sandy Spring. He retained a lifelong love of reading and education.

His wife of 54 years, Loris Grant Jones, died in 1996.

Survivors include two daughters, Loris Butterfield of Clarksville and Elaine Grace of Fairfax County; and three grandchildren.