330-PSA-9-63 (USN 711224):  LCU-1620 is craft of the LCU-1600 class fitted with vertical-axis (cycloidal), propellers, equipped with two six-blade, controllable pitch, 500 horsepower propellers.  The LCU-1620 is steered by shifting the direction of thrust of both propellers simultaneously.  In tests the LCU-1620 stopped completely in three quarters of her length from a full speed of more than 11 knots.  She turned a complete circle in still water in less than 10 seconds, fully loaded, she retracted, turned around, and came out over a sandbar bow on.  Photograph released January 15, 1963.  (2015/10/13).
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