The RAF Sunderland Flying Boat had a high wing and a deep hull with 4
engines. The Radar was ASV Mk 3 or Mk 5, a sea-going version of H2S.
Sunderlands were employed on submarine hunting over the North Atlantic
and Indian Oceans. 3000 MHz, 50 kW peak pulse power, radar range =
100 miles.

A radar scanner could not be installed under the nose. It had to be
kept out of the water. Instead there were two syncronised scanners,
one hanging under each wing tip. They rotated together, one scanner
covering the port side 180 degrees and the other the starboard side.

The magnetron output was switched in the waveguide system between port
and starboard, changing over at 5 degrees away from dead ahead to
avoid spurious switching effects.

The parabolic scanners, rotating about once every two seconds, had a
habit of getting out of sychronism when the aircraft made a tight
turn. Something to do with gyroscopic, centrifugal and gravitational
forces. It took 7 or 8 seconds to regain syncronism by which time the
radar operator had got the target and other ships in the vicinity all
mixed up with each other on the radar PPI display.

Aa the radar operator over the China Sea, I was once severely cursed
(reprimanded) over the intercom by the skipper for getting ourselves
lost immediately following a tight turn. But the war was now over and
it was only a practice exercise.
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Reg.