Cussler, an author of more than 80 books and founder of the National Underwater Marine Agency, funded years of searches for Flight 2501, at an estimated cost of more than $500,000.

DETROIT — Researchers have ended a 20-year quest to find the wreckage of a 1950 airliner that disappeared over Lake Michigan in what was then the worst aviation disaster in U.S. history.

Cussler, an author of more than 80 books and founder of the National Underwater Marine Agency, funded years of searches for Flight 2501, at an estimated cost of more than $500,000.

Kongsberg’s Seaglider Division Transferred to Hydroid. Marine robotic systems manufacturer Hydroid., a subsidiary of Kongsberg Maritime, announced its integration of the Seaglider Autonomous ...