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The mareograph (mareograph; literally "sea recorder") is a self-registering instrument for the continuous measurement of the sea ​​level at an oceanographic gauge station .

It belongs to the group of writing levels and was developed in the 19th century to automate the periodic reading on the traditional level staff .

With long-term registration, the mean water can be specified to the centimeter and serve as a reference level for the national survey . The level of this mean sea level corresponds approximately to the geoid .

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Web links

Commons : Mareographers  - collection of images, videos and audio files