Benjamin Rosenberg, 63, a retired research and development official with the Department of the Navy, died of congestive heart failure Saturday at Sarasota Memorial Hospital in Sarasota, Fla.

Mr. Rosenberg was born in New York City and graduated from the City College of New York with a bachelor's degree in chemical engineering. During World War II, he worked at the Philadelphia Navy Yard.

In 1946, he moved to the Washington area and continued his government career as project manager at the Naval Ship Research and Development Center at Carderock. He also earned a master's degree in physics at the University of Maryland.

A specialist in underwater acoustics, Mr. Rosenberg later transferred to the Bureau of Ships and then to the Office of Naval Research. From 1959 until his retirement in 1972, he was the assistant director for research and development in the Office of the Chief of Naval Operations.

He lectured at the Naval War College at Newport, R.I., and the Merchant Marine Academy at Kings Point, N.Y. He also published numerous papers in professional journals.

When he retired from the government, Mr. Rosenberg, who had lived in Silver Spring, moved to Miami, Fla., where he was a consultant to the Institute for Acoustical Research until his second retirement in 1977. He then moved to Sarasota, Fla.

Mr. Rosenberg's survivors include his wife, Miriam Novick Rosenberg, of Sarasota; one son, Kevin, by a previous marriage that ended in divorce, of Hyattsville; three stepchildren, Dianne Novick, of Chevy Chase, Louis Novick, of Silver Spring, and Beth Novick, of Arlington; one brother, Steve Remsen, of Miami Beach, Fla., and one stepbrother, Sidney Scherer, of Riverdale, N.Y.

The family suggests that expressions of sympathy be in the form of contributions to the Hospice of Sarasota, P.O. Box 15225, Sarasota, Fla., 33579.