Antonis Grafas (b. 1968, Athens) is a professional commercial diver and underwater researcher. Since 1998, he has specialized in deep technical diving (Trimix) and cave diving, collaborating professionally with underwater operations and the Hellenic Navy. He has discovered, documented, and identified numerous historic shipwrecks and WWII aircraft (including Citta di Tripoli, Patris, Aldebaran, Altair, Ju-52, and Wellington) at extreme depths of up to 144 meters.