Papyrus Rafts are the indirect witnesses (they were still manufactured fifty years ago) of the first vessels of the Nile, back in Neolithic times. They indeed existed in forms still advanced in 3000 BC. The Papyrus was of course the most common herbaceous found on the delta wetlands: It was available in large quantities, possessed a moderate buoyancy, good flexibility, and could give come in many braided forms. Typical raft had a raised bunch, held at both ends by a rope, The same one found on the first soft wooden boats. The Cibora - the Chub of Papyrus - gradually passed in the shape of a basket or a basket, perhaps in 6000-7000 BC (Nile Neolithic peoples), to that, lying in a "shell". The latter was full, in fact, and came with some accessories for properly seawards, like a maneuver bench, a portico for a paddle used as a drift, and a bipod mast on which was mounted a sail (4000-3500 BC, before the founding of the two Kingdoms).
Thor Eyerdhal experimented with the Ra-I in the 1960s but proved that it was absolutely essential to raise the stern as much as possible to prevent water from impregnating papyrus too much. It is only on this condition that a large ship (made of boots thicker than in the center, constituting the shell) could sail in the Mediterranean, on the great rivers, even in the Indian Ocean, which Ra II inspired Aztec ships demonstrated superbly, as did the Tigris (Mesopotamia). Despite their qualities, Papyrus boats had reduced buoyancy for a certain size, and a length limited to 10 meters at most. It was therefore logical that they should give way at some point to wooden vessels.