In the 1960s, Susan Womer Katzev, a marine illustrator, and her husband, the archaeologist Michael L. Katzev, spent two summers diving with a team beneath the lapping waves of the Mediterranean off Cyprus.

Their quarry was an ancient shipwreck on the sandy ocean floor discovered just years earlier by a man foraging for sponge. It would become a startling find.

Before it sank in the third century B.C., the Kyrenia had traded food, iron and millstones out of its home port, thought to be the island of Rhodes. After more than 2,000 years underwater, much of its hull and cargo — old plates, coins, amphoras that once held wine and others that still held almonds — were remarkably intact.

Mrs. Katzev’s drawings and photographs helped document a discovery that revealed not only ancient trading behaviors but also a wealth of information about how the Greeks built ships. For decades, her and her husband’s efforts have been heralded for their central role in establishing nautical archaeology as a field.

This year, some two decades after Mr. Katzev’s death, Mrs. Katzev and a co-editor won plaudits for a definitive account of the ship’s excavation, a 421-page first volume that won a major award in January from the Archaeological Institute of America.