Water is typically good for radio. In the 2m frequencies I could hear virtually the entire lake Balaton (which is 72km long and 15km wide). 70cm also quite good as far as I remember -- just having holidays here, however, I no longer have the ham licence so I can't try. With the GSM signals usually my phone connects to the other side of the lake which is around 20km away on open water and shows a very good signal (full bar with the 3G which is 1800MHz here in Europe) You may need to put the antenna to the highest point on your boat though, like the top of the mast. Tamas On Sat, Aug 15, 2009 at 9:51 AM, Electron wrote: > > Thank you Gus.. this really looks "it". :) > > > At 17.49 2009.08.14, you wrote: > >Update: > >Digi.com says that their swappable 900 Mhz and 868 Mhz modules are > >accepted around the world. > >( one or the other in each geographical location ) > >These are better than 2.4 GHz because of range considerations. > > > >Look at the 900MHz Zigbee modules from Digi > >http://www.digi.com/technology/wireless/products.jsp > >Up to 64 km. > >Unfortunately, policies for RF spectrum allocation vary across the > >world. > >Gus > > > > > > > > > >-- > >http://www.piclist.com PIC/SX FAQ & list archive > >View/change your membership options at > >http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.mcuhobby.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist