This rib made by DSG/Ficht in Germany is used by the firemen to rescue people living along the (frozen) lakes: where a boat or a snowmobile can not go, this rib always will ...
I presume ...
Be patient, two days ago I got in touch with the manufacturer who is about to send me an information CD-ROM. We'll probably have more pics, maybe a movie. Stay connected ...
Here are some more pics I have received from Ficht (Germany). From the loooooooooong movie also supplied on the cd, one can see that that boat actually is no rib but a simple inflatable with an alloy skid plate ( all flat ! ). For fresh water only !