Shahzada Dawood, Executive, 48, and Son, 19, Die Aboard Submersible

Shahzada Dawood, a British Pakistani businessman who was among the five people aboard a submersible journeying deep into the Altantic to view the Titanic, was killed when the vessel imploded during its descent to the ocean floor, the authorities said Thursday. He was 48.

His 19-year-old son, Suleman, who was with him on the Titan submersible, was also killed.

Mr. Dawood was the vice chairman of Engro Corporation, a business conglomerate headquartered in the Pakistani port city of Karachi that is involved in agriculture, energy and telecommunications. His family is known as one of the wealthiest business families in the country.

His work focused on renewable energy and technology, according to a statement from his family.

Mr. Dawood was born on Feb. 12, 1975, in Rawalpindi, Pakistan. He studied law as an undergraduate at Buckingham University in Britain and later received a master’s degree in global textile marketing from Philadelphia University, now part of Thomas Jefferson University. In 2012, he was named a Young Global Leader by the World Economic Forum.

His son was a business student at the University of Strathclyde in Glasgow and had just completed his first year, a spokesman for the school said. Like his father, he was a fan of science fiction and enjoyed solving Rubik’s Cubes and playing volleyball, according to a statement from Engro.