Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
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Status: STD 2014/02/14
Code: 1437

Concept definition: A circular material <OBJECT>, usually painted flat white, that is used to measure (subjectively) the <<DEPTH_BELOW_WATERBODY_SURFACE>> to which a <HUMAN> can see into a <WATERBODY>, in order to measure the transparency of the <WATER>; Secchi disk.
Reference type: IR
Reference: [SECCHI]
Supplemental references:  

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