Mark 27 Fire Control Radar (original) (raw)

Wavelength

10 cm

Pulse width

0.3 microseconds

Pulse repetition frequency

1500 Hz

Power

50 kW

Range

40,000 yards (36600 m) against battleships and cruisers
10,000 yards (9100 m) against submarines
Minimum range 200 yards (180 m)

Antenna

2'6" x 1'3" (76.2cm x 38.1cm) parabolic section

Scope

5" A scope
PPI

Accuracy

15 yards (14 m)
3 mils

Resolution

120 yards (110 m)
6 degrees

Antenna weight

425 lbs
193 kg

Production

Appeared late in the war

The Mark 27 was a fire control radar that took the place of optical range finders atop battleship fire control towers. It was developed from the Mark 3 but was much more compact.