Grady-White Boats Gulfstream 232, Owner'S Manual

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5-4
Chapter 5: Instrumentation
Yamaha Helm Master™
Helm Master™ is an fully integrated boat control system for Yamaha outboard-powered boats,
in twin or triple engine configurations, which includes digital electronic steering, digital electronic
throttle and shift, and a joystick control to facilitate docking. It also includes a virtual anchoring
system, called “Set Point.”
The Helm Master
TM
Set Point has three primary modes: Stay Point™, Fish Point™, and
Drift Point™. Each Set Point mode provides a solution to the sometimes tricky maneuvering
challenges boaters encounter every day. Here is how it works:
• Stay Point:
Stay Point keeps the boat positioned near a particular spot; it maintains a selected
position and heading.
• Fish Point:
Fish Point enhances fishing options; it maintains a selected position, but not a heading,
and primarily uses only idle RPM to do so.
• Drift Point
Drift Point allows the boater to drift the boat with the wind or the current; it maintains a
selected heading, but not a position.
On the joystick are two control selector buttons. The Joystick selector activates the joystick. The
remote control must be in the neutral (center) position for this selector to be activated. The High
Mode selector allows for increased engine RPM. The joystick controls the side to side and rotational
movement of the vessel. The operator is the central pivot point around which the boat moves and
the further one moves the joystick, the greater the thrust and speed in that direction. Return the
joystick to the neutral position when finished maneuvering. Operating the throttle disengages the
joystick and returns operation to the remote control box and steering wheel.
The Digital Steering Helm sends signals to the Powertrain Control Units (PCU), which control
the operation of the electric pumps that pump hydraulic fluid to the steering cylinders on the
engines. The Steering Control Unit (SCU) receives signals from the steering cylinder position
sensors and the PCUs to carry out joystick and steering operation. One by-pass valve assembly per
engine is required, and allows the hydraulic pump system to be by-passed in an emergency or for
maintenance.
The Digital Remote Control has 6 control selector buttons whose activation is indicated by a
green LED. The Speed Control selector is used to set the RPMs throughout the range of the engine.
The Single Lever selector allows the port lever to control the shifting and speed of all engines. The
Station Selector is used to select the active station on boats with two stations. The Center Engine
selector allows the port lever to control the center engine only in triple engine applications. The
Trim Assist selector allows the operator to synchronize the trim angle to a given RPM so that the
engine will trim to the desired angle. The Free Throttle selector allows the selected engine to be
throttled up with the shift function disengaged.