Type 281 radar

For long-range warning the radar used a 15 microsecond pulse at a power level of 350 kW that gave a detection range up to 110 nautical miles (200 km; 130 mi) for aircraft.

For tracking surface targets it used a 2–3 microsecond pulse at 1 MW that gave a range up to 12 nautical miles (22 km; 14 mi).

[2][3] This set also had a secondary aerial and surface gunnery capability and used a Precision Ranging Panel.

Aerial target ranges were passed directly to the HACS table (fire control computer).

It was fitted with improved receivers that increased the maximum detection range for an aircraft at 20,000 feet (6,100 m) to 120 nautical miles (220 km; 140 mi).