[Krupp]

I don't remember the source (book) anymore cos there was so many of them that I read about U-Boats for the past few months. But I remember one saying that the bridge was very noisy place to be. Sound from the wind, waves, air inlets for the diesels and the boat itself, diesel exhaust sound (actually pretty loud even located 15-20 meters behind the bridge). It also said that it was pretty much impossible to hear aircrafts propeller noise behind all these. The type VII and VIIB had the diesel exhaust silencers exits located above the waterline witch made it noisier than type VIIC for example. Most certainly the noise from the actual diesel engine room didn' t reach the bridge via galley, senior rate's quarters, control room and the attack central in the conning tower.