Although most of Yonca's hair is chopped off during the Vikings' axe throwing contest, her tresses return to their original full length after she's rescued by Tarkan.
In the final scene, Tarkan is in the bow of the Viking ship as it backs away from the dock. However, there is no wind (the sail is limp) and the oars are not in the water, so the vessel is evidently motorised.
When Lotus falls back into the snake pit, we see a multitude of crew hands and arms catching her near the bottom of the screen.