Furuno NAVpilot-711C Installation Manual page 65

may be turned more often. With a higher number, the rudder turns slowly, but the
course may not be kept as precisely.
3) Push the knob to confirm setting.
How to manually set NAVpilot steering parameters
When [MANUAL-CALM], [MANUAL-MODERATE] or [MANUAL-ROUGH] is selected as
the sea state, set [MANUAL PARAMETERS] as below.
You can set three parameters for the MANUAL function: Weather, Rudder gain and
Counter rudder.
1. Rotate the knob to select [MANUAL PARAMETERS] from the [PARAMETER SETUP]
menu then push the knob. The display now looks like the one shown below.
[WEATHER]
[RUDDER GAIN]
[COUNT RUDDER]
2. Rotate the knob to select the setting of [WEATHER-CALM] then press the knob.
3. Rotate the knob to set value (0
4. Push the knob.
5. Set [WEATHER-MODERATE], [WEATHER-ROUGH] and [RUDDER GAIN] and
[COUNT RUDDER] similarly (Setting range: 1-20 for rudder gain, 0-20 for counter rud-
der).
6. Press the MENU key to finish.
Guidelines for how to set SEA STATE
[WEATHER]: When the sea is rough, the boat's heading fluctuates to port and starboard.
If the rudder is driven very often to maintain the set course, the helm mechanism may
wear out. To prevent this, the weather adjustment makes the NAVpilot insensitive to
minute course deviations. You may choose a degree between 0° to 10°. Until the course
deviation exceeds the selected setting, steering to correct the heading will not be initiated.
The illustration shown right shows boat's track
lines with weather setting 3° and 7°. When 7° is
set, for example, the rudder is not driven until the
course deviation exceeds 7°. Increasing the set-
ting reduces activation of the steering gear, how-
ever the boat tends to zigzag. When the sea is
calm, set a smaller value.
[RUDDER GAIN]: When the boat's heading deviates from the set course, the NAVpilot ad-
justs the rudder to correct it. The rudder angle (number of degrees) which is steered
against every degree of course deviation is known as the rudder gain.
[CALM] [MODERATE]
1° 2°
3 5
1 2
to 10 for weather).
° °
3. INITIAL SETTINGS
[ROUGH]
3°
10
4
7°
3°
Weather = 3° Weather = 7°
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