Those fog horns on ships are kinda noisy too ; ) When i worked offshore the fella who did the receiving of rig supplies also usually had a larger duffel bag going home than when he got there. I had to stop by his place once in east texas to change some timing gears. When i got there nobody was around so i went to ring the doorbell. When i pushed the doorbell button, a fog horn sounded from top of his barn lol