Ptolemaic vessels were significant in transporting essential goods in ancient times, particularly for the city of Alexandria. These well-equipped ships could carry substantial loads, with each capable of transporting around three hundred tons of wheat on their journeys down the river. This capacity underscored the importance of trade and agriculture in sustaining urban populations.

Every day, at least two of these ships embarked on their voyages, bringing vital supplies of wheat, barley, and lentils to feed the residents of Alexandria. This regular flow of food highlights the logistical efforts that supported one of the ancient world's major cities, illustrating the extensive agricultural systems that were necessary to maintain such a large urban center.