The uncertain reach of pre-Columbian American seafaring

How far could pre-Columbian societies in the Americas have traveled at sea, and why is the evidence so limited?

Large river craft and outrigger technology suggest meaningful capability, but surviving traces do not support firm long-distance claims, while epidemic loss erased much knowledge that might have clarified the picture.

Substantial river craft and outrigger technology suggest that some American societies possessed useful seafaring capacity. That capability does not prove a particular transoceanic voyage, and the surviving record is too fragmentary for confident reconstruction. European-introduced epidemics killed communities and knowledge holders on an enormous scale, leaving later observers with a damaged account of earlier practice. Norse activity has a firmer anchor because settlement and archaeological remains survive. Technological possibility and documented contact remain separate questions.