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The head of navigation is the farthest point above the mouth of a river that can be navigated by ships. Determining the head of navigation can be subjective on many streams, as the point may vary greatly with the size or the draft of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective, being caused by a waterfall, a low bridge that is not a drawbridge, or a dam without navigation locks. Several rivers in a region may have their heads of navigation along a line called the fall line. * v * t * e

Attributes	Values
rdf:type	place
rdfs:label	Head of navigation (en)
rdfs:comment	The head of navigation is the farthest point above the mouth of a river that can be navigated by ships. Determining the head of navigation can be subjective on many streams, as the point may vary greatly with the size or the draft of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective, being caused by a waterfall, a low bridge that is not a drawbridge, or a dam without navigation locks. Several rivers in a region may have their heads of navigation along a line called the fall line. * v * t * e (en)
dct:subject	Nautical terminology
Wikipage page ID	638798 (xsd:integer)
Wikipage revision ID	1100197808 (xsd:integer)
Link from a Wikipage to another Wikipage	Narrowboat River mouth River Thames Dam Lechlade London Bridge Nautical terminology Draft (hull) Drawbridge Osney Bridge Oxford Fall line Thames Head Waterfall Cabin cruiser St John's Lock Canal lock Ships
sameAs	Head of navigation Head of navigation Head of navigation
dbp:wikiPageUsesTemplate	dbt:Short_description dbt:Unreferenced dbt:Water-transport-stub
has abstract	The head of navigation is the farthest point above the mouth of a river that can be navigated by ships. Determining the head of navigation can be subjective on many streams, as the point may vary greatly with the size or the draft of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective, being caused by a waterfall, a low bridge that is not a drawbridge, or a dam without navigation locks. Several rivers in a region may have their heads of navigation along a line called the fall line. Longer rivers such as the River Thames may have several heads of navigation depending on boat size. In the case of the Thames, that includes London Bridge, which historically served as the head of navigation for tall ships; Osney Bridge in Oxford, which has the lowest headroom of any bridge on the Thames that generally restricts navigation to smaller vessels such as narrowboats and cabin cruisers, and the long reach above St John's Lock, the first lock downstream of the river’s source, on the outskirts of Lechlade, where the river can become treacherously narrow and shallow for anything but small motorboats and human-powered vessels. * v * t * e (en)
gold:hypernym	Point
prov:wasDerivedFrom	wikipedia-en:Head_of_navigation?oldid=1100197808&ns=0
page length (characters) of wiki page	1491 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Head_of_navigation
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