These weathered stones whisper tales of war. Right here before you lie the foundations of a winch house. This unassuming site holds a pivotal role in Sydney’s history. It’s a silent sentinel a remnant of the Sydney Harbour anti-submarine boom net. This net a crucial World War II defence spanned the entire harbour. Its purpose was to thwart enemy submarines from entering.
The boom net a massive undertaking began construction in January 1942. It was fully operational by August of that year. For over three years it guarded Sydney Harbour’s entrance. All vessels ships ferries fishing boats had to pass through one of three gates. These gates were part of the boom net. The net itself was suspended between clusters of piles. It was composed of wire and interlocking steel rings. These were roughly 450 millimetres in diameter.
The winch house you see now or rather its foundations played a vital role. It powered the winches that controlled the boom gates. These gates regulated vessel access to the harbour. Imagine the tension the urgency the constant vigilance during those war years. The winch house workers held a vital position in Sydney’s wartime defence. Their actions contributed to safeguarding the city.
The night of May 31 1942 remains infamous. Three Japanese midget submarines attempted to breach the harbour’s defenses. The Battle of Sydney Harbour ensued. One submarine M-14 became entangled in the net. It was discovered by a night watchman James Cargill. The submarine was subsequently destroyed. The other two submarines penetrated the net. They launched attacks before being destroyed. The incomplete boom net at that time highlights the challenges of wartime construction.
After the war the boom net was dismantled. Today only remnants remain. The winch house foundations stand as a poignant reminder. They are a silent tribute to the bravery and ingenuity of those who defended Sydney Harbour during World War II. The foundations are a lasting testament to a crucial chapter in Sydney’s history. A forgotten story now revealed to you.