A beautiful new iBook has been published by Dr. Richard Kirby who has been conducting studies of the oceans in cooperation with sailors, including the OCC, using the Secchi Disk. A description of the programme and updates to it can be found here.

http://www.dailymail.co.uk/sciencetech/article-2722690/The-unexpected-beauty-PLANKTON-Magnified-photographs-showcase-microscopic-creatures-incredible-diversity.html

Vice Commodore, OCC