Due to this high prevalence, vertebral artery hypoplasia (VAH) has not yet been considered an independent risk factor for ischemic stroke [1,2].
How to use your own headphones on Americanâs new 777-300ER. Passengers traveling in First and Business Class on Americanâs new 777-300ER are provided with Bose QuietComfort 15 Acoustic Noise Canceling headphones to use during the flight.
Handheld devices, such as tablets, e-readers and mobile phones may be used during all phases of the. flight provided the âflight safeâ mode is enabled before departure. the customerâs hand or a pocket during taxi, take-off and landing. Accessories, such as headphones, must not obstruct access to the aisle. Any device that transmits or receives communications but does not have a âflight safeâ mode, must be. switched off for the duration of the flight. These devices may be used during boarding but not for taxi, take-off and landing. They may be used. in-flight, provided any built-in connectivity such as wi-fi is switched off or set to âflight safeâ mode.