On 27/07/2015 20:23, Jochen Topf wrote:
This is more about the water flow than about being navigable by a ship.
Indeed. Given that the waterway tagging rules cited in the OP applies equally to streams, ditches & drains, then the routability clearly does not imply navigability, merely continuity of the watercourse, obstructions such as weirs, sluices, locks, etc not withstanding.
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