1. It Helps Prevent Uncontrolled Arm Movement
During a sudden impact or heavy turbulence, the body naturally moves because of inertia.
Loose arms may:
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Swing forward
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Strike nearby equipment
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Cause injuries
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Delay evacuation readiness
Keeping the hands secured beneath the thighs helps minimize unnecessary arm movement.
2. It Encourages Correct Body Position
The position reminds crew members to maintain proper posture throughout takeoff and landing.
This includes:
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Sitting upright
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Keeping the spine aligned
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Maintaining stable foot placement
A stable posture may help reduce injury during sudden aircraft movement.
3. It Keeps the Hands Ready After an Impact
Cabin crew must often respond within seconds following an emergency landing.
Their responsibilities may include:
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Opening emergency exits
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Assessing outside conditions
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Directing passenger evacuation
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Assisting injured passengers
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Communicating with the flight deck
Keeping the arms close to the body reduces the chance of hand or arm injuries that might interfere with these critical duties.