The Catalina, built in San Diego, landed in Hawaii on January 27, 1941, after traversing 4392 kilometres. Honolulu was where Qantas took delivery of the long-range planes that the airline would later use for the Double Sunrise flights. Those flights covered 6480 kilometres between Perth and Ceylon (now Sri Lanka), a route that remains the longest scheduled passenger service by elapsed time.
At the time of the delivery, the United States was still neutral in the war. Australia, with its links to Britain, was already a combatant. The same year, in December, the Imperial Japanese Navy carried out its surprise attack on US military bases in Hawaii. The US then declared war on Japan and Germany, transforming the global conflict.
The Double Sunrise service, which began on July 10, 1943, became a lifeline for Qantas and maintained communications between Australia and the United Kingdom. The flying boats were critical in keeping Allied connections open across the Indian Ocean.