About: Half tide dock

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A half tide dock is a partially tidal dock. Typically the dock is entered at high tide. As the tide ebbs a sill or weir prevents the level dropping below a certain point, meaning that the ships in the dock remain afloat, although they still rise and fall with the tides above this. Half tide docks are particularly useful in areas with a large tidal range.

Attributes	Values
rdfs:label	Half tide dock (en)
rdfs:comment	A half tide dock is a partially tidal dock. Typically the dock is entered at high tide. As the tide ebbs a sill or weir prevents the level dropping below a certain point, meaning that the ships in the dock remain afloat, although they still rise and fall with the tides above this. Half tide docks are particularly useful in areas with a large tidal range. (en)
dcterms:subject	Docks (maritime) Coastal construction
Wikipage page ID	1163532 (xsd:integer)
Wikipage revision ID	1017675408 (xsd:integer)
Link from a Wikipage to another Wikipage	Docks (maritime) Tide table Floating dock (impounded) Coastal construction Weir Dock Old Dock Severn Estuary Sharpness
sameAs	Half tide dock Half tide dock Half tide dock
dbp:wikiPageUsesTemplate	dbt:Anchor dbt:Refimprove dbt:Reflist
has abstract	A half tide dock is a partially tidal dock. Typically the dock is entered at high tide. As the tide ebbs a sill or weir prevents the level dropping below a certain point, meaning that the ships in the dock remain afloat, although they still rise and fall with the tides above this. Half tide docks are particularly useful in areas with a large tidal range. The sill of a half tide dock must be set sufficiently far below the daily high tide mark to allow ships to pass over it. Obviously this was easier to achieve with small ships of shallow draught, or in areas with a large tidal range. Inside the dock, the depth of water beneath the sill's level depends only on the depth to which the dock was excavated, although this obviously increases construction costs. The importance of the sill, and the tide's height above it, is reflected by these dock sills becoming an important local datum level and for tide tables being calculated for heights above it (i.e. clear draught in and out of the dock). This importance has often continued for many years after the original sill had been replaced, as at Sharpness on the Severn Estuary, or where the dock had disappeared entirely, such as Old Dock Sill in Liverpool. (en)
prov:wasDerivedFrom	wikipedia-en:Half_tide_dock?oldid=1017675408&ns=0
page length (characters) of wiki page	1907 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Half_tide_dock
is Link from a Wikipage to another Wikipage of	Canning Half Tide Dock Prince's Half-Tide Dock Sandon Half Tide Dock Half Tide Dock Bramley-Moore Dock Bridgewater Canal History of Sunderland River Wandle Salisbury Dock Branch dock Sill (dock) Floating dock (impounded) Sharpness Half-tide basin
is Wikipage redirect of	Half Tide Dock Sill (dock) Half-tide basin
is type of	Canning Half Tide Dock Sandon Half Tide Dock
is foaf:primaryTopic of	wikipedia-en:Half_tide_dock

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