Why do airlines say souls?

Regarding the number of people onboard an aircraft, the term soul was used to count the number of passengers and crew. The word can be traced back to the great sailing ships of the 18th century. Back then, many ships were lost at sea, and the missing dead sailors were called lost souls.



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When turbulence is anticipated or suddenly encountered, the Captain will turn on the FASTEN SEATBELT sign. If turbulence is severe, the Captain will make an announcement “Flight Attendants please be seated”. Immediately discontinue service and return to your jumpseat or sit in the nearest available seat.

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What do pilots say right before takeoff? These can vary, but in general, the announcements are relatively standard across different airlines. Most pilots will typically introduce themselves and the cabin crew; state the aircraft type, flight number, and route, and remind passengers of the airline's seatbelt policy.

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While Souls On Board is still used in aviation today, it is more often associated with the number of passengers and crew killed following an air crash. ATC controllers use souls so that rescuers will know how many passengers and crew they are looking for in the event of a crash.

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Turbulence is a sudden and sometimes violent shift in airflow. Those irregular motions in the atmosphere create air currents that can cause passengers on an airplane to experience annoying bumps during a flight, or it can be severe enough to throw an airplane out of control. (The pilots) aren't scared at all.

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Severe turbulence can cause a plane to drop so suddenly that pilots temporarily lose control. But, again, that's not enough to crash the plane. That's not to say it's never happened. In 1966, human error and turbulence combined to bring a plane down over Mount Fuji.

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While turbulence can feel scary, airplanes are designed to withstand massive amounts of it. A plane cannot be flipped upside-down, thrown into a tailspin, or otherwise flung from the sky by even the mightiest gust or air pocket, wrote pilot Patrick Smith on his site, AskThePilot.com.

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In Alan Kay's keynote speech he talks about the blue plane and a pink plane. The pink plane represents ideas which are an incremental improvement of existing ideas. The blue plane which runs orthogonal to the pink represents revolutionary ideas that break the old way of doing things, setting you off in a new direction.

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An orange airplane at the top of your screen means your device is in airplane mode. Wireless functions like WiFi or Bluetooth will be turned off.

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Pilots and flight crews use several colors of flight suit. NASA crews, for example, wear blue flight suits as a sort of functional dress uniform during training. The orange suits that they wear during launch and re-entry/landing are designed for high visibility, should there be an emergency recovery.

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Wake turbulence poses a major risk to other aircraft, so pilots and ATC use the term “heavy” in radio transmissions as a reminder that the aircraft's wake may be dangerous to others passing behind or below the flightpath of these larger-mass aircraft.

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When an aircraft experiences turbulence, the plane can drop or change altitude suddenly. This is why pilots always caution passengers to buckle up and stay seated when they are experiencing flight turbulence. The sudden movements put passengers at risk.

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The disruption in the air current which helps a plane to fly results in shakes and it is referred to as turbulence. Also known as air pockets, turbulence can cause a sudden loss of altitude temporarily.

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USA TODAY's pilot expert says most bumpy flights, you're only going down a few feet. And by a few he says most times it less than 100 feet. Of course 100 feet is a 10 story building and you're going up and down! He says humans notice the rate of change more than the actual change itself.

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In modern times (the last 30 years or so), no modern aircraft (anything built in the last 30 years), has had an in flight break up leading to a crash due to turbulence at cruise altitude. It just doesn't happen.

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Winter has strong winds and blizzards, and summer's hot heat can create unstable air, thunderstorms, and tropical storms. That means flying during the holidays often means more turbulence than other times of the year. So if possible, avoid flying between December and February or June and August for a smoother flight.

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Autopilot is designed to cope with turbulence and will keep the aircraft close to the intended flight path without the risk of overcorrection. The recommendation is to keep autopilot ON during a turbulence encounter.

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And then there's the chime that, hopefully, you'll never have to hear: three high-low chimes, which signals an emergency situation.

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The phrase five by five can be used informally to mean good signal strength or loud and clear. An early example of this phrase was in 1946, recounting a wartime conversation.

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Whether flying at night or during the day, pilots need to see some kind of horizon. They use this to determine the airplane's attitude. At night pilots will turn their gaze from outside to inside and use the artificial horizon. The artificial horizon is normally a simply globe split into two hemispheres.

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