David Mark Konigsberg, 24, a 1977 graduate of the University of Rhode Island, where he was a champion sailor, died of a brain tumor Thursday at his home in Chevy Chase.

Mr. Konigsberg, a native Washingtonian, had been involved with sailing since his youth. Besides sailing with his family on the Chesapeake Bay, he participated in the numerous regattas and boat races held on the bay each year and had sailed his sloop, The Yellow Jacket, in annual yacht races from Annapolis to Newport, R.I., to Bermuda. He also sailed in the Southern Ocean Racing Conference held off the coast of Florida.

He was a member of the University of Rhode Island sailing team that won the New England Championship in 1977.

Until his illness two years ago, Mr. Konigsberg was studying for a master's degree in ocean engineering under a fellowship from the University of Rhode Island, where he earlier had earned a bachelor's degree in mechanical and ocean engineering.

Mr Konigsberg had used his free time in hospitals during the course of his illness to work with other seriously ill patients and their families and had been active in Make Today Count of Silver Spring, a support group for terminally ill patients and their families.

He was a 1973 graduate of Bethesda-Chevy Chase High School and a member of the West River Sailing Club in Galesville, Md.

Survivors include his parents, Tolbert H. and Jean S. of Chevy Chase, and a brother, James L., of Washington.

The family suggests expressions of sympathy be in the form of contributions to Make Today Count in Silver Spring.