USS Menkar (AK-123) was a Crater-class cargo ship, converted from a Liberty Ship, commissioned by the U.S. Navy for service in World War II. She was first named after John White, a settler among those who sailed with Richard Grenville, to present-day North Carolina, in 1585, to found the Roanoke Colony. White acted as artist and mapmaker to the expedition. He became the governor, in 1587, of the colony, and his granddaughter, Virginia Dare, was the first English child born in the Americas. She was renamed and commissioned after Menkar, the second-brightest star in the constellation of Cetus. She was responsible for delivering troops, goods and equipment to locations in the war zone.

The St. Johns River Shipbuilding Company was created in Jacksonville, Florida during World War II to build Liberty ships.