The early Ekrani were developed in Saratov. The first really operational one was shaped like a flying saucer. There is a night club on the Volga Embankment called the Ekran, complete with enlarged black and white pictures of the river craft. It operated as a ferry for a while. Andrei Liakhev once wrote that they were expensive to build. Conventional airframe techniques didn't quite work as everything had to be that much stronger and every piece of airframe was different.