ARC 3001 MK2 Operation

ARC 3001MK2
OPERATION SUMMARY

ARC

3001MK2

AARRCC 33000011 MMKK22 OOPPEERRAATTIIOONN SSUUMMMMAARRYY

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System Star tup

To start the ARC-3001 MK2 it is first necessary to press and hold the
(I)+TEST button until an audible beep is heard (approximately one second).
The unit will first go into a test mode, which lasts approximately twenty
seconds. After the test program has been completed it will automatically switch
to the center position.

Note

When the power unit controls are set to auto the initialization of the ARC-3001 will
automatically start the power unit. After starting the ARC-3001, verification that the
power unit is running should be made.

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ARC 3001MK2
OPERATION SUMMARY

0Caution:

When the vessel is underway or maneuvering, the system should be active. In the case
of maneuvering, the system should be in center. If it is not possible to activate the
system, then the manual centering system should be engaged. Under no circumstances
should the system be left inactive or with the manual centering system disengaged when
the vessel is underway or maneuvering.

Active operation of the Quantum Controls ARC-3001 MK2 stabilizer system
can be divided into four parts:

1. The Automatic Mode (Underway)

2. The Manual Mode (Underway)

3. Zero-Speed Standard Mode

4. Zero-Speed Modulated Mode

1. Automatic Mode (Underway)

After the system startup has been completed it is possible to select the desired mode
of operation. If the Auto mode is selected there is no further adjustment required.
For most
constantly update the operating parameters for best results.

sea conditions the Auto mode should be the first choice, as it will

2. Manual Mode (Underway)

In severe or unpredictable sea conditions it may be desirable to utilize the
manual mode. A typical example of this is given below:

In severe stern or following seas the Auto mode will try to reduce the roll.
However, it is hesitant to use the full fin travel all the time as this could result
in cavitation around the fins, with the attendant noise problems. In such a case
one could decide that some cavitation noise is a small price to pay for reduced
rolling. It has also been found that in very light or flat sea conditions the use of
manual mode can be advantageous as it allows the operator to reduce the
system gain and soften the ride of the vessel. The manual mode also allows the
adjustment of the natural list control. In certain conditions it may be desirable
to reduce or increase the amount of natural list correction.

After pressing the Manual button, three of the rotary controls will be available
for trimming the system for best performance. The LED next to the active
control will light up.

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ARC 3001MK2
OPERATION SUMMARY

Lower Left: (NATURAL) LIST CONTROL

Every vessel from time to time will encounter a natural
list due to such factors as wind heal or loading
conditions. The system can automatically correct this
by means of placing the fins at an offset angle from
their neutral plane, thus inducing a constant lift force
to maintain the correct attitude.

It is important to understand that offsetting the fins will add extra resistance
through the water. For long passages it is better to leave this control in the low
position. If required, make the necessary list corrections through ballasting. By
increasing this control (rotating clockwise) the fin offset for a given list angle is
increased.

Upper Left: FIN ANGLE DEFLECTION

The amount of fin deflection against the signal given
from the roll sensor is a variable. With this control it is
possible to increase or decrease the overall sensitivity
of the system. At low speeds the fins need to move
through larger angles than would be required at high
speed to correct the roll motion. If the setting is too
high, the vessel may feel stiff or under certain

circumstances the control will appear to over-correct.
As most Zero-Speed systems have overly large fins to accommodate the
requirements necessary to stabilize the vessel at anchor, adjustment of this
control can be important to optimize the ride and feel of the vessel. It may also
be desirable to reduce the gain on this control in very heavy seas to minimize
loads on the fins. This is especially prevalent on four fin systems.

Lower Right:

BEAM/FOLLOW

When sailing under following-sea conditions, the

approaching frequencies of the waves are much lower

than when sailing under beam-sea conditions. In

following-seas, the system requires more signal from

the angle sensor due to the low frequencies of

encounter. For these conditions the control should be

turned towards FOLLOW. In beam-seas the roll
velocity signal needs to have priority. For this condition the
would be more suitable.

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BEAM position