No present equipment effectively extracts energy from slow speed shallow tidal, river, or other slow moving or shallow water. Also axial turbines can kill fish.
The appended device data describes a new low speed pancake horizontal turbine design which uses large horizontal blades on the streaming side, which autofold on the return side, capable of extracting energy from high volume low speed water.
Grid interfacing equipment can be mounted on top of the floating mobile anchorable assembly.
The units can be towed and anchored with connecting cables run along the river/estuary bed.