Lets not forget that the replica boat is only a half size version.
The excavated portion, which is only possibly half its length, consists of its lower extremities as well. The replica has been successfully navigated with a full crew in the open sea of the channel beyond the confines of Dover Harbour and also along the River Thames. As the River Dour, even in the Bronze Age, is only a small stream by comparison to other English rivers, where else would it go but out to sea? Another similar full size replica was also navigated within the Severn Estuary recently without a problem. There is a scheme afoot in the near future to take the replica out to sea and along the coast from Dover to Folkestone harbour. That will be a very telling event?