The airline requires passengers to prepare for an unexpected reason, while, up or down.
Electronic device or use a telephone talk of new Germany which audits Siemens groups only with headphones
.May cause passengers can't hear the announcements because unlike the captain or crew;
?There should be a concentration range of passengers ready to receive the message at any time. Many airline passengers, binonuyat can use electronic devices. After the airplane to a safe level.
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