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4. Control Units
4.1 How the ECDIS is Controlled
The user controls the ECDIS with the Control Unit RCU-018 or the Control Unit RCU-015. Either unit is equipped
with a trackball, right and left mouse buttons and a thumbwheel. The RCU-018 is additionally equipped with a
keyboard. All functions of the ECDIS can be accessed using the trackball, mouse buttons and thumbwheel alone. To
operate from a menu with the mouse, roll the trackball to choose desired item, operate the mouse buttons or
thumbwheel (depending on item) to choose option and then push the thumbwheel to confirm your selection.
4.2 Control Unit RCU-018
The Control Unit RCU-018 consists of a keyboard, the trackball, thumbwheel and mouse buttons. The trackball
functions like a mouse; the user rolls the trackball and operates the left and right mouse buttons to access functions.
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