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tides.gc.ca
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Definitions (96)
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Height of Tide
Height of tide is the vertical distance between the surface of the sea and Chart Datum. The total depth of water is found by adding the height of tide to the charted depth. For example, at a place whe [..]
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Current station
The geographic location at which current observations are conducted. These may include a buoy, ground tackle, current meters, recording mechanism, and radio transmitter
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Mean water level
The average of all hourly water levels over the available period of record.
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Overtide
A shallow water harmonic tide constituent with a speed that is a multiple of the speed of one of the basic constituents of the tide-producing force. See harmonic constituent, and shallow water constit [..]
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amphidromic point
A no-tide point, from which cotidal lines radiate.
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amplitude
In physics, the maximum departure of a wave or other periodic phenomenon from the average or zero position. In tide terminology, the semi-range of the harmonic constituent.
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Aphelion
The orbital point farthest from the Sun when the Sun is the center of attraction, as opposed to perihelion.
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Apogean tides or tidal currents
Tides of decreased range or currents of decreased speed occurring monthly when the Moon is near apogee.
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Apogee
That orbital point farthest from the Earth when the Earth is the center of attraction, as opposed to the Perigee.
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BENCH MARK
A permanent, stable object containing a marked point of known elevation with respect to a datum used as a reference level for tidal observations or as a control point for levelling. A tidal bench mark [..]
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