Furuno 511, 520 manual Counter Rudder, General guidelines for setting counter rudder gain

Page 44

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 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

4-6

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Page 43 Page 45
Contents Autopilot 00014860304 Safety Instructions Table of Contents Alarms IiiWord to the Owner of the NAVpilot-511/520 FeaturesForeword System Configuration System configuration of NAVpilot-511/520This page is intentionally left blank Principle of the Autopilot Principle of AutopilotPrinciple of Operation Control unit, front view Basic OperationOperating Controls Startup sequence Turning the power offTurning On/Off Contrast, brilliance window Adjusting Brilliance and ContrastMain menu ex. Stby mode Displays Choosing the display modeDisplays Selecting the data shown on Data Display Selecting dataAnalog indicator selection Displayed dataSteering Modes Stby ModeStby mode display Ex. Normal Display Auto mode display Ex. Normal Display Auto ModeUsing the Auto mode Advanced Auto mode Advanced Auto mode display Ex. Normal DisplayEnabling the Advanced Auto mode Advanced auto options windowNAV mode display Ex. Normal Display NAV ModeStarting the NAV mode NAV mode, Course and XTE Selecting sailing method of NAV modeNav mode options window Switching waypoint Waypoint switching options windowSteering Mode Turn menu inputting TLL data Turn ModeTurn menu 180º Turn for Auto mode only Example of 180º maneuver in turn mode360º Turn for Auto mode only Example of 360º maneuver in turn modeOrbit Example of orbit maneuver ex. clockwiseTo escape from the Orbit while it is in use, press Stby key Example of spiral maneuver in turn mode SpiralSteering Mode Example of Figure Eight in NAV mode Figure EightNavigating to TLL point TLL navigationRemote Mode Dial type remote controller FAP-5551Turning power on dial type FU Follow-Up mode display dial remote controllerTurning power off dial type Rotating dialTurning power on, button and lever type remote controllers NFU No Follow-Up mode displayOperating remote controller ex. button and lever types Turning power off, button and lever type remote controllersDodge mode display Dodge ModeDodging in Stby mode Dodging in Auto or NAV mode Heading fromThis page is intentionally left blank Menu Operation Stby Mode MenuStby mode menu Setting parameters Parameter setup menuSelecting the method of entering the parameter Sea state options windowMANUAL-CALM Deviation level options windowSetting parameters manually Example of Manual parameterTrack line and weather setting value Rudder angle and rudder gain settingWeather Rudder GainGeneral guidelines for setting counter rudder gain Counter RudderAdjusting the sensitivity in monitoring the boat’s trim Auto trim options windowWhen towing the net NAV ModeNav mode data source window ex. default setting Auto net towing options windowFish Mode Waypoint SwitchingRadius of Orbit Spiral SpeedSetting other menu items System setup menuActivating key beep Key beep options windowLocking the control unit Lock options windowSetting the panel dimmer Alarm setup menu AlarmsAlarm Setup Menu Selecting the alarm buzzer Audio alarm options windowAlarm interval options window Selecting the beep patternWatch alarm options window Setting the watch alarmSetting the heading deviation alarm Setting the cross-track error limit XTE alarm options windowSetting the speed alarm Speed alarm options windowSetting the depth alarm Depth alarm options windowSetting the temperature alarm Setting the trip distance alarmTemp alarm options window Log trip options windowClearing the trip distance Log trip clear options windowAlarm Information Alarm menuAlarm messages Alarm messages, their meanings and prioritiesMaintenance & Troubleshooting Preventive MaintenanceMaintenance program Check point RemedyReplacement of Fuse DiagnosticsParts Name Type Code No Remarks Test options windowHeading Sensor Test Processor Unit TestControl Unit Test Screen Test Keyboard TestNavpilot-511Navpilot-520 Rudder Setup and Auto Test Rudder testSystem data screen Clearing MemoriesSystem Data Error message Meaning Remedy Error MessagesError messages Error messages con’t Menu Tree MN-1Auto mode menu MN-2NAVPILOT-511/520 Control UnitProcessor Unit InterfaceCoating Color Power SupplyEnvironmental Conditions Index IN-1
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520, 511 specifications

Furuno is a renowned name in the marine electronics industry, best known for its high-quality navigational and communication tools. Among its diverse product line, the Furuno 511 and 520 stand out as exceptional marine radars designed to enhance boating safety and efficiency.

The Furuno 511 radar is equipped with advanced technologies that offer a range of functionalities essential for navigating in various sea conditions. One of the key features of the 511 is its high-resolution display, which ensures that users can easily interpret radar images in real-time. This radar system operates on a frequency of 9.41 GHz, enabling it to provide superior target detection and tracking capabilities, crucial for identifying other vessels, landmasses, and potential hazards.

Another notable feature of the Furuno 511 is its automatic radar plotting aid (ARPA). This technology allows the radar to track multiple targets simultaneously, providing mariners with critical information such as their relative speed and course. This tracking ability enhances situational awareness and aids in making informed decisions on course adjustments.

On the other hand, the Furuno 520 radar is designed with similar cutting-edge technologies, offering a robust suite of features tailored for both commercial and recreational vessels. The Furuno 520 boasts advanced signal processing capabilities, which result in enhanced target discrimination and a clutter-free display. This is particularly beneficial in busy shipping channels or congested waters where distinguishing essential targets from background noise is vital.

The Furuno 520 also integrates a user-friendly interface, allowing for easy navigation of settings and options. This ease of use is further augmented by customizable display options, enabling users to tailor the radar presentation to meet their specific needs. Additionally, the radar incorporates automatic gain control, ensuring that targets can be seen clearly regardless of environmental conditions.

Both the Furuno 511 and 520 exemplify durability and reliability, constructed to withstand the rigors of maritime environments. With their robust builds and weather-resistant features, these radars are designed to function optimally, providing crucial navigational support in adverse conditions.

In conclusion, the Furuno 511 and 520 radars are exemplary pieces of equipment that deliver essential features and technologies for maritime navigation. Their advanced tracking capabilities, signal processing, and user-friendly interfaces make them ideal for enhancing safety and efficiency on the water. For anyone serious about marine navigation, investing in these high-performance radars is a smart decision that can significantly improve situational awareness and overall boating experience.
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