Raymarine St290 Specifications download pdf (Page 257)

8-4-14 Section 8: Autopilots

ST290 Instrument System Owner’s Handbook

Step 2: Adjusting autopilot settings

The next stage of the seatrial is to set important parameters that affect the

autopilot’s steering characteristics, i.e. rudder gain, counter rudder and

ruddertrim. The manner in which you adjust these depends on the type of

autopilot system you are using:

• 150G and 400G autopilot systems have an AutoLearn facility that

automatically adjusts these parameters, to suit your boat.

• If you are using a T150 or T400 (non-GyroPlus) autopilot, you will

need to adjust these parameters manually.

Note: For a full explanation of the parameters set during the AutoLearn,

and how to adjust them manually, refer to Manual setup on page 8-4-17.

Using AutoLearn to adjust settings

WARNING:

The AutoLearn process requires a significant amount of CLEAR

SEA SPACE in front of the boat. The autopilot will take the boat

through a number of zig-zag maneuversuntil it has acquired enough

data. If you need to cancel the AutoLearn at any time, press the

STANDBY button to gain manual control of the boat.

Figure 4-8: AutoLearn maneuvers

If you are using a 150G or 400G autopilot system, use AutoLearn to set

rudder gain, counter rudder and rudder trim. Before commencing

AutoLearn, ensure that you have at least the amount of clear sea space

shown in Figure 4-8 .

At least 0.25 nm (500 m) of clear sea space

At least 0.04 nm (100 m)

of clear sea space

D5495-1

MINUTE

(approximately)

Wind

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Raymarine St290 Specifications Page 257