Many months ago, as a one of my hobbies are the meteorological matters, I locate an interesting document, who talking about these themes. The meteororological war, is a question very interesting in wich both bands, German & Allies (by Intelligency, of course) received data about the meteorological conditions. This in a resume, but note that inside a reference from a book who explains in detailed form all the knowledge about this themes: http://www.international.icomos.org/madrid2002/actas/39.pdf I found an interesting article in PDF: The development and use of weather buoys 1940-2005 John A. Kington Climatic Research Unit, University of East Anglia, UK Franz Selinger Obering, i. R., Ulm, Germany Fig. 1 Loading on U-boat, U-703, of a Wetterfunkgerät (see) buoy for launching in the Arctic Ocean, Narvik, Norway, September, 1944 (Edwin Stoebe via © Arctic Archive, Franz Selinger) http://www.realtechsupport.org/UB/MRIII/papers/CollectiveIntelligence/WeatherBuoys1940-2005.pdf If you are interested in these themes, and understand Spanish -you could will translate online-, In U-Historia you find an article about these matters. Follow this route: http://www.u-historia.com > Historia > Artículos Históricos > Meteorología en la Guerra Submarina. I'm a collaborator of U-Historia webpage from many years Jan.