Furuno 611 fast, Boats Speed, slow, calm, Sea State, rough, light, Load Condition, heavy, high

4. MENU OPERATION

Set rudder gain so that the boat does not make frequent yaw. The figure shown below provides general guidelines for setting rudder gain.

fast		Boat's Speed	slow
calm		Sea State	rough
light		Load Condition	heavy
low		RUDDER GAIN	high
	General guidelines for setting rudder gain

COUNTER RUDDER

If the boat is heavily loaded, the heading could change excessively because of inertia. This phenomenon causes the vessel to “overshoot” the intended course. If this happens, the NAVpilot-511/520/611 will steer the rudder to the opposite side and the heading will turn in opposite direction excessively again. In an extreme case the heading oscillates several times until it finally settles in the new course. An adjustment known as “counter rudder” prevents this kind of oscillation.

Counter rudder is usually not required for small boats. When your boat zigzags a lot before settling in the new course, increase the counter rudder setting.

	Large course error
Counter rudder:	Intended
small setting	course

Counter rudder: proper setting

The counter rudder feature functions to smoothly return ship's heading toward intended course.

slow		Boat's Speed	fast
light		Load Condition	heavy
low	COUNTER RUDDER		high

General guidelines for setting counter rudder gain

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