tides
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8 Terms
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What are semi-diurnal tides?
Have two high water and two low water tides in a day of 24 hrs, tides changing every 6hrs.
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BST
British summertime time zone used by United Kingdom - April/October
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Dying height
Height above chart datum: rocks, wrecks & sandbanks. If something has a dime height of 2 m, it means it rises 2 m above the lowest tide.
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low water
lowest level the tide reaches during a title cycle.
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HAT
highest tide level that can possibly occur. Maximum height
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Secondary port
Harbour doesn’t have its own full set of title predictions, uses other nearby standard port.
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Depth of water
Actual amount of water above the sea bed. charted death + HOT
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America current
Golf stream, Northwards
Note 
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