Tides and Tidal Current Flashcards
The height of the tide is the difference between?
The depth of the water and the area’s tidal datum
The difference between the heights of low and high tide is?
The range
The stand of the tide is?
The time when the vertical rise or fall of the tide has stopped
Mean lower low water is?
The average height of the lower of two low waters at a place
The average height of the surface of the sea for all stages of the tide over a 19 year period is called?
mean sea level
When there are small differences between the heights of two successive high or low tides in a tidal day the tide is called?
semidiurnal
The class of tide that prevails in the greatest number of important harbors on the atlantic coast is?
semidiurnal
When is a tide diurnal?
When only one high and one low water occur during a lunar day
Spring tides occur when?
The Sun, Moon and Earth are nearly in line, in any order
Spring tides are tides that?
Have lows lower than normal and highs higher than normal
Neap tides occur when?
The Sun, Moon, and Earth are at approx. 90 degrees to each other as seen from Earth
Current refers to?
The horizontal movement of water
set of current is?
the direction towards which is flows
Where would you find info about the time of high tide at a specific location?
Tide Table
The datum from which predicted heights of tides are reckoned in the tide tables is?
The same as used for charts of the locality
