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- Q1241829 subject Q6274556.
- Q1241829 subject Q7503268.
- Q1241829 abstract "The rule of twelfths is a rule of thumb for estimating the height of the tide at any time, given only the time and height of high and low water. This is important when navigating a boat or a ship in shallow water, and when launching and retrieving boats on slipways on a tidal shore.The rule assumes that the rate of flow of a tide increases smoothly to a maximum halfway between high and low tide before smoothly decreasing to zero again and that the interval between low and high tides is approximately six hours. For the six hours,the rule says that in the first hour after low tide the water level rises by one twelfth of the range, in the second hour two twelfths, and so on according to the sequence - 1:2:3:3:2:1.".
- Q1241829 thumbnail Rule_of_twelfths.PNG?width=300.
- Q1241829 wikiPageWikiLink Q1143832.
- Q1241829 wikiPageWikiLink Q11446.
- Q1241829 wikiPageWikiLink Q1398821.
- Q1241829 wikiPageWikiLink Q1521177.
- Q1241829 wikiPageWikiLink Q1645369.
- Q1241829 wikiPageWikiLink Q23384.
- Q1241829 wikiPageWikiLink Q2916349.
- Q1241829 wikiPageWikiLink Q35872.
- Q1241829 wikiPageWikiLink Q361945.
- Q1241829 wikiPageWikiLink Q6274556.
- Q1241829 wikiPageWikiLink Q7503268.
- Q1241829 wikiPageWikiLink Q956736.
- Q1241829 comment "The rule of twelfths is a rule of thumb for estimating the height of the tide at any time, given only the time and height of high and low water.".
- Q1241829 label "Rule of twelfths".
- Q1241829 depiction Rule_of_twelfths.PNG.