Testing
All alarms are tested regularly. The crew is first warned that testing is beginning, then each alarm is sounded from every alarm location. Because the general quarters alarm lasts for several seconds, the collision alarm is sounded very briefly to override and cut it off. The many locations whence the collision alarm can be sounded are traditionally tested from stern to bow, beginning with the engine room lower level aft location sounding the alarm as briefly as possible, then each subsequent location sounding the alarm for a slightly longer period of time. By the time the torpedo room sounds the alarm, it is held on for several complete cycles of the siren.
Read more about this topic: Alarms On Submarines Of The United States Navy
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“Traditional scientific method has always been at the very best 20-20 hindsight. It’s good for seeing where you’ve been. It’s good for testing the truth of what you think you know, but it can’t tell you where you ought to go.”
—Robert M. Pirsig (b. 1928)