The archaeologists hope to begin the first phase of the underwater ship excavation next year.
"The current and the low visibility makes research in the Danube extremely difficult. But the find looks promising: we suspect this is an intact wreck," he added.
Indeed, a medieval pot was found next to a floor timber, inside the wreck.
"We believe that the entire cargo could be preserved under the pebble-shoal," Tóth said.
Although many ships have sunk in the river, only a few wrecks have been retrieved from its waters so far.
Last year, the extreme dry winter exposed a 14th-century wooden wreck of a probable ship-mill at Dunaföldvár, about 58 miles south of Budapest.
"Watermills planted on ships were widely diffused on the rivers of Middle Danube Basin," Tóth said.
Most likely, the ship sank during a feudal conflict, as reported in a contemporary document.
In December 2011, another wreck was discovered near Ráckeve, about 30 miles south of Budapest. Possibly dating to the Middle Ages, the ship was pretty similar to the Dunaföldvár wreck.
"Unfortunately the finder destroyed the ship by cutting it into 5-foot-long pieces. He had planned to use the oak wood for heating his house. It was a heap of firewood, but we could detect the original construction from the shapes and other caracteristics of the plank," Tóth said.
Photos: Top: A handmade nail, fixing an L shaped rib on the newly discovered wreck. Credit: Attila J. Tóth; Middle: A pot recovered from the wreck. Credit: Attila J. Tóth.