SRT 427-0002B, Инструкция по установке и эксплуатации

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Operation
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Options menu key. Provides access to additional features and relevant
shortcuts on certain screens.
Back / Home key. When pressed with a short press cancels the current
operation and moves to the previous menu or if pressed and held will return to
the home screen.
Select key. When pressed selects the current option highlighted on the
screen.
Up, down, left and right function keys. Provide an alternative means of
navigating around the screen.
Speaker. The speaker is located behind the ‘Scroll’ wheel and can provide an
audible sound when a key is pressed, a message is received, or an alarm is
activated. Sounds can be enabled or disabled via the Sound Settings menu.
Micro SD card. The Micro SD card socket (behind the door) is provided to
allow uploading of new software to the AIS transceiver.
Display. The display shows essential AIS operating information and allows for
configuration of the AIS transceiver via the menus.
4.4 Adjusting display brightness
Press and hold the ‘Chart / Screen brightness’ key. The screen will change to
the ‘Display Settings’ screen.