According to a section of
this interesting report that Johnbr found, the Walther Werke at Kiel carried out a lot of experimental work with rocket propelled hydrofoils (in the form of hydrofoil floats with Walther Engines). They were able to reliably achieve speeds of 50 knots. They also carried out work on rocket propelled landing barges, but I'm uncertain if the two activities were linked, due to the way the report is written.
The floats were described as being fitted with three hydrofoils, two forward and one aft.
Landing barges capable of running up the beach, and in the example shown in the film, of clearing the sand dunes and coming to rest in a field of cows.
VS8_01.jpg
VS8_02.jpg
VS10_01.jpg
HTB_01.jpg
