On 9/2/14 1:12 PM, Martin Koppenhoefer wrote: > > 2014-09-02 17:46 GMT+02:00 Clifford Snow <cliff...@snowandsnow.us > <mailto:cliff...@snowandsnow.us>>: > > Then again if I made a pontoon out of concrete, they'd just sink. > > > > > While I generally agree with your agreement, this is not true, ships > can be built out of concrete (think aircraft carriers for instance), > and German universities even hold a regular competition who builds the > best canoe out of (fibre)cement: http://www.betonkanu-regatta.de/ the British built two whole artificial harbors during WWII using concrete pontoons:
http://en.wikipedia.org/wiki/Mulberry_harbour https://www.flickr.com/photos/nfgusedautoparts/sets/72157607171004437 richard -- rwe...@averillpark.net Averill Park Networking - GIS & IT Consulting OpenStreetMap - PostgreSQL - Linux Java - Web Applications - Search
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