| http://www.w3.org/ns/prov#value | - So, you have a relatively small number of military ships that are capable of making the trip - this was a motivation behind some of the RN, USN, MN etc gunboats - and most of the traffic is handled by motorised or sailing junks and barges that are light enough to be towed upstream when the rapids are in full blast and handy enough to make it downstream without capsizing, but these are so small tha
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