8 minute timer blue tech7/30/2023 The aircraft heard the noise after dropping sonar buoys, which drifted on the surface, listening for sounds that nature would be unlikely to make. The four-engine turboprop P-3 Orion, which detected the mysterious banging noise on Wednesday, first entered service in 1962 and is based on the Lockheed Electra airliner. Yet as the lost Titan sub shows, submersibles remain very difficult to find, especially at depths of 3.8km (12,400ft) where the wreck of the Titanic is found. The fact that these aerial hunters are packed with advanced new technology would seem to give them the advantage. It's usually a cat-and-mouse game between aircraft and submarines that want to stay hidden. ![]() Often based on civilian designs, these machines deploy a suite of impressive-sounding sensors to locate military submarines under the sea. Hunting for submersibles is traditionally the exclusive job of some of the largest and most technologically-advanced aircraft in any air force. How can aircraft flying high above the waves detect something so deep underwater? ![]() The signal continues to be investigated and analysed, say officials. On Wednesday, the US coastguard announced that a Canadian P-3 aircraft had identified unexplained underwater noises, apparently banging at half-hour intervals. Ever since the Titan submersible was confirmed lost in the Atlantic this week, planes have been combing the ocean to hunt for it beneath the waves.
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