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Observe


The webpage reflects administrators´ views and the Managing Authority of the Central Baltic Interreg IV A Programme 2007-2010 cannot be held liable for the information published by the administrators.

Want to become a Secchi-observer?


Secchi-observation near Turku, SW Finland. Photo: Heikki Kiviluoto

We're constantly looking for new, committed secchi-observers around the Baltic Sea. We can either send you a Secchi-disk or if you happen to live in Turku, you can come and pick a disk at our office. Free of charge.

Please fill in the form below, if you want a Secchi-disk.


*Please, tell us your name!
*Please, tell us your Address!
*Please, tell us your e-mail!
 

Secchi-disk

 
 
 

Secchi-disk is a round disc, which is used in Marine Research to measure visibility depth. The disk was developed by the Pope’s scientific advisor Pietro Angelo Secchi in 1865. The idea for the disk came from a white ceramic plate that was dropped in the sea and glowed from the depths. In order to get coherent results the measurements are usually made with a 30 cm disk.