Obituaries

Frank S. KadiFAA Official

Frank S. Kadi, 86, a Federal Aviation Administration official, died after a stroke Oct. 25 at his home in Conway, S.C.

Mr. Kadi was chief of the FAA's radar engineering division at the time of his retirement in 1974. He began his career as a radio technician in the Army during World War II, then joined the Civil Aeronautics Administration after the war. He later switched to the FAA. He helped design and install radar in the South Pacific and helped establish the Office of Telecommunications in the FAA.

He was born in Boltz, Pa., and attended Temple University. In retirement, he moved to Marco Island and Clearwater, Florida, then to South Carolina.

Mr. Kadi volunteered and coached his children's sports activities when they were young. He enjoyed the outdoors, particularly Deep Creek Lake, Md., and in retirement traveled to many destinations with the Earthwatch Institute and similar organizations.

His wife, Elaine Kadi, died in 1986.

Survivors include four children, Barbara Raven of Conway, David Kadi of Springfield, Karen Kadi of Fairfax and Steven Kadi of Marietta, Ga.; a sister; and five grandchildren.

Robert H. Cantrell Jr.Navy Scientist

Robert H. "Bob" Cantrell Jr., 75, a retired scientist with the Department of the Navy, died Oct. 4 at Brooke Grove nursing home in Sandy Spring of a progressive dementia disorder. He was a 45-year resident of Silver Spring.

Dr. Cantrell was born in Fairfield, Ala., and received a bachelor's degree in physics from Harvard University in 1953. From 1953 to 1956, he served in the Navy, much of that time on the destroyer USS Stribling. He returned to Harvard and received a master's degree in mathematics and a doctorate in engineering in 1961.

For the first six years of his career, he worked at the Johns Hopkins University Applied Physics Laboratory in Laurel. In 1967, he joined the Department of the Navy at the David Taylor Research Center at Carderock. Working in the Signatures Department, his area of expertise was signal processing. He was instrumental in the development of systems to detect, measure and analyze submarine noise and helped develop new sonar systems installed on submarines.

The recipient of numerous awards for technical achievement and a mentor to younger colleagues, Dr. Cantrell retired in 1998.

In retirement, he devoted a great deal of time and energy to helping others. He was a longtime member of Silver Spring Presbyterian Church, where he served three three-year terms on the church session and 18 years as church treasurer.

He was a volunteer at Silver Spring HELP, where he and fellow church members worked moving furniture for the needy, and for many years was the behind-the-scenes coordinator for the congregation's WIC program. From 1998 to 2002, he was a laborer and volunteer executive director of Habitat for Humanity in Montgomery County.