Bukh D4 Operator's Manual page 41

Optional
42
Bukh Joystick is a control used for docking and
maneuvering. Practise using the joystick and its
functions in a safe and proper manner. Practise how
to operate the boat with both joystick docking and
steering functions.
CAUTION!
The joystick maneuvering works differently
depending on if the docking function or steering
function is active.
Practise using all means of steering and throttle under
all conditions.
The docking function is designed to be used when
docking or maneuvering in close quarters. Use the
steering wheel and throttle control levers in all other
situations.
The boat is maneuvered by moving the joystick
forward, aft, abeam, twisting the top of the joystick and
combinations of the movements.
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