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Message: <blockquote data-quote="Dalenthas" data-source="post: 45720" data-attributes="member: 269">>>1. Using bronze age/medieval sailing tech would it be effiecent to sail or row against the flow of a river?Depends on the speed of the current. If its a relativly slow river it should be easy to row against, otherwise you'll end up going backwards anyway. Take the Speed of the current and add it to the speed of a boat going downstreem, or subtract it from the speed of a boat going upstream. Thus a rowboat that can move 30ft per round in calm water can move up a river thats current does not exceed 29ft/round. The boat would move 1 ft per round though and it'd be easier to carry it overland <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" />. If the same boat were going downstream in the same river, it could go 59 ft in a single round, or if you don't paddle at all it'll go 29 feet downstream anyway.>>2. If it is not, how would the boats get back to the start destination? Hauled overland? Sailed into the ocean? I might remember something like this from the misisippie river.Hauled overland, or pulled using horses/oxen/whatever that are onland but leaving the boat in the water.>>3. Is the build of a river ship different than and ocean ship?Depends on the depth/with of the river. Most river boats don't go very deep under water though, and few ocean ships can go far up a river without running aground (unless its a wide and deep river. NOTE: No matter how intelligent you think that reply was, if someone contradicts it trust them (unless they sound even MORE like an idiot). I'm not an expert on river boating, hell, I've never been in a boat on a river before...</blockquote>

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