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4. HOW TO CUSTOMIZE YOUR NAVPILOT
4-3
How to manually set NAVpilot steering parameters
When [MANUAL-CALM], [MANUAL-MODERATE] or [MANUAL-ROUGH] is selected
as the sea state, set [MANUAL PARAMETER] as below.
You can set three parameters for the MANUAL function: Weather, Rudder gain and
Counter rudder.
1. Rotate the Course control knob to select [MANUAL PARAMETER] from the [PA-
RAMETER SETUP] menu then push the knob. The display now looks like the one
shown below.
2. Rotate the Course control knob to select the setting of [WEATHER-CALM] then
press the knob.
3. Rotate the Course control knob to set value (0° to 10° for weather).
4. Push the Course control knob.
5. Set [WEATHER-MODERATE], [WEATHER-ROUGH] and [RUDDER GAIN] and
[COUNTER RUDDER] similarly (setting range: 0-10 for weather, 1-20 for rudder
gain, and 0-20 for counter rudder).
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 star-
board. If the rudder is driven very often to maintain the set course, the helm mecha-
nism may wear out. To prevent this, the weather adjustment makes the NAVpilot
insensitive to minute course deviations. You may choose a degree between 1° to 10°.
Until the course deviation exceeds the selected setting, steering to correct the heading
will not be initiated.
The illustration at the top of the next page 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 devi-
ation exceeds 7°. Increasing the setting 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
adjusts 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] [ROUGH]
[WEATHER] 1° 2° 3°
[RUDDER GAIN] 3 5 10
[COUNTER RUDDER] 1 2 4
7°
3°
Weather = 3° Weather = 7°