The effectiveness of an early dipping system depends partly on the target rather than only on the sensor. World War II submarines are mechanically noisy compared with boats designed after decades of acoustic competition. Machinery rafting, which isolates vibration from the hull, was a major stealth improvement that did not mature until the 1960s. A primitive interwar detector therefore need not equal a Cold War sonar to provide tactically useful bearings against early-war submarines. This technological mismatch strengthens the plausibility of helicopter-assisted anti-submarine warfare in the scenario.
Notable Point · 1:43:28-1:45:19
Early submarines remain vulnerable to acoustic detection
World War II submarines lack later machinery-isolation techniques, making even an immature helicopter acoustic system more useful than a modern comparison suggests.