Rear Admiral Parry, who once commanded HMS Gloucester, a Type 42 destroyer, said that the Type 45s were “noisy as hell” under water, which made them easily detectable by Russian submarines at long range.
Parry said the ships were "noisy as hell", adding: “During the Cold War . . .the ships I was in were the equivalent of a whisper.“These ships now are the equivalent of someone shouting at somebody.”
He said the MoD had ploughed money into the warship's sophisticated anti-aircraft and anti-missile system "without thinking about the anti-submarine element". He believes that the navy had mistakenly overlooked suppressing the noise of its destroyers after the Cold War had ended because the threat from Russian submarines had diminished.
He said: ”We used to put little wooden wedges between the hatchclips and the hatches in my destroyer to stop them rattling so we could keep the Continued noise down. "We have forgotten all about it — it's crazy. Noise suppression has been probably the biggest dirty secret since the end of the Cold War that people have been cheerfully ignoring."