The SU was a World War II vintage surface search radar and was fitted aboard PRESTONIAN class frigates. Known for its good surface clutter rejection, it also had an A-scan for use as a gunnery spotting radar for the 4" gun and the maximum range mark was 80 miles. The radome for the SU is rather plain - roughly 4 feet tall and 2.5 feet in diameter, has a rounded top but just a little flat. Sixteen bolts clamp the radome to the base. Four or five cables and the waveguide come out the bottom, just off-center of the base, in the arc of a circle.
Type: Surface search shipborne radar
Operating frequency: 9085.5 MHz (X band)
Power Output: 50 kw
Pulse Lengths: 1/4 to 1 microsecond pulse
Initial Procurement by USN: Quantity 896
Year of procurement: 1944