NOAA Photo Library Banner
Takes you to the Top Page Takes you to the About this Site page. Takes you to the Contacts page. Takes you to the HELP page. Takes you to the Credits page. Takes you to the Collections page. Takes you to the search page. Takes you to the Links page.

NOAA Photo Library Image - ship4454

Figure 1. A plastic Secchi disk of recent origin. This disk is lowered in the water until it disappears from sight. The depth at which it disappears is a measure of the water's transparency. Father Angelo Secchi devised this method in 1865 and tested it aboard the Vatican vessel IMMACOLATA CONCEZIONE. Several models were tested of different colors.

Image ID: ship4454, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco

Category: Oceanography/

High Resolution Photo Available





Publication of the U.S. Department of Commerce, National Oceanic & Atmospheric Adminstration (NOAA),
NOAA Central Library
NOAA Privacy Policy | NOAA Disclaimer
Last Updated:
May 12, 2014