During World War II a vital radar system stood at Dover Heights in Sydney. This wasn’t just any radar. It was the first Australian-built radar. It was called the Shore Defence radar. Its purpose was to detect enemy ships approaching Sydney Harbour.
The story of this radar is one of ingenuity and speed. Secret information about radar technology arrived from the United Kingdom in 1939. Australian scientists and engineers at the CSIR Radiophysics Division at the University of Sydney quickly sprang into action. They used this information to create their own radar system. A key innovation was using a single antenna for both sending and receiving radio pulses. This design was later adopted by the United Kingdom.
The need for air defence became urgent. A prototype air-warning radar was built in just five and a half days. This incredible feat highlights the intense pressure and dedication of the team. This prototype had no safety covers exposing the crew to dangerous voltages. In December 1941 it was put into service at Dover Heights. For months it was Sydney’s only electronic air surveillance system.
The radar at Dover Heights played a crucial role. It helped warn of and repel attacks. One AW radar was even sent to Darwin. Following the devastating first Japanese air raid on Darwin the radar was barely out of its crate. Sydney-based scientists raced to Darwin to get it working. Their efforts were vital for the second air raid. The radar helped warn of the imminent danger. It allowed for an effective defense. Air-warning radar was also used successfully in Townsville. It helped detect and guide the shooting down of a Japanese bomber.
The Australian-designed radars weren’t just copies. They were innovative. The Lightweight Air Warning radar was a prime example. It was designed by a team led by Dr JH Piddington and BF Cooper. This radar was much lighter than American models. It could be easily disassembled and transported. It was built to withstand the harsh tropical climate. The US forces greatly valued the LW/AW radar. They requested 30 units during the Pacific War. Sixty units were supplied.
The story of the Dover Heights radar isn’t just about technology. It’s about people. Scientists and engineers pushed the boundaries of innovation. They worked tirelessly to protect Australia. Their contributions were essential. The story of the radar is a testament to Australian resilience during a time of great conflict. Their remarkable efforts ensured Sydney’s safety. The legacy of the Dover Heights radar remains a symbol of ingenuity and determination.