4 ms·
"Between 5:34 a.m. and 11:29 a.m., according to a later computer analysis by Rolls-Royce, the Aiviq’s “wire tensile strength overload” alarm went off 38 times.
by keithpeter 12y ago
"Between 5:34 a.m. and 11:29 a.m., according to a later computer analysis by Rolls-Royce, the Aiviq’s “wire tensile strength overload” alarm went off 38 times. It was set to trigger at 300 tons. The alarm, a piercing ring, would not stop until Newill acknowledged it on the computer screen. New to Alaska and new to a ship that was new to the world, Newill later claimed that the alarm never went off. Coast Guard investigators concluded that he mistook the tension alarm for another alarm that was known to be acting up."
Dialog box on screen saying which alarm might have been an idea perhaps. Software was obviously logging all the events.
- thrownaway2424 12y agoNothing in the article suggests this alarm is based in software. Couldn't it just as easily (in fact rather more easily) been a strain gauge hooked up to an amp and comparator with a buzzer?
- jws 12y ago…would not stop until Newill acknowledged it on the computer screen… Sounds like software to me. I suppose you could put a computer controlled relay into your physical system, but the software would still have to know which alarm it was disabling.
- keithpeter 12y ago...and the Rolls Royce technical people must have had a log of some kind to know that the alarm had sounded 38 times. I suppose it could be a tachograph type mechanical log...
- thrownaway2424 12y agoHuh, you're right. I read it twice without parsing "on the computer screen." Anyway, the lesson I took away from this story was that you shouldn't have alarms that regularly go off and are known to be spurious.