furuno navnet vx2 operator s manual

The five soft keys provide various functions according to current operating mode. Page 15 1. OPERATIONAL OVERVIEW Soft keys The function of the five soft keys changes according to the operation. Their labels for their current functions are shown on the screen to the left of the keys. Each press of the key shows preset soft keys, user function keys or turns off navigation information (at the top of the screen). Note: The remote controller may become damaged if dropped. Insert the appropriate chart card for your area as follows: 1. Open the chart drive. A beep sounds and then the equipment shows the startup NavNet screen (about 20 seconds), the product information screen, startup test results and chart usage disclaimer. During this period the equipment is inoperative. A set of soft keys for adjustment of brilliance and hue appear. MANUAL SET follows the color settings on the CHART DETAILS menu for the plotter and the RADAR DISPLAY SETUP menu for the radar. Page 21 1. OPERATIONAL OVERVIEW 1.5 Selecting a Display 1.5.1 Display modes If you have a radar, navigator and network sounder five full-screen displays are available: radar, plotter, echo sounder, nav data and overlay. In addition to the full-screen display, you can divide the screen into halves and thirds to show two and three sets of images on a combination display. Full screen (Ex. radar) Combination screen (Ex. The icons of modes not available are shaded. HOTPAGE 1-HOTPAGE 5 are user-arrangeable displays called “hot pages,” which you can configure as you like. Roll the Cursor pad to shift the cursor. You can inscribe the mark from any mode except nav data, when playing back data or conducting any test. Note that this function requires position data. The description below shows the procedure using the default setting. Page 27 1. OPERATIONAL OVERVIEW 1.8 Data Boxes Data boxes, providing navigation data, may be shown on any full-screen display.

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Please try again.Register a free business account Exclusive access to cleaning, safety, and health supplies. Create a free business account to purchase Please try your search again later.You can edit your question or post anyway.Does not cover installation.To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness. Only qualified personnel should work inside the equipment. Do not disassemble or modify the equipment. Fire, electrical shock or serious injury can result. Immediately turn off the power at the switchboard if the equipment is emitting smoke or fire. Continued use of the equipment can cause fire or electrical shock. Contact a FURUNO agent for service. Keep heater away from equipment. In accordance with Article 6-3 of this directive, FURUNO intends to put this radar on the market of the following countries in EU as well other markets. We are confident you will discover why the FURUNO name has become synonymous with quality and reliability. For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for quality and reliability throughout the world. The screen you see depends on your system configuration and equipment settings. Page 10 SYSTEM CONFIGURATIONS All NavNet products incorporate a “network circuit board” to integrate each NavNet product on board through an optional LAN cable (Ethernet 10BASE-T). Each NavNet product is assigned an IP address to enable transfer of images between other NavNet products. For example, video plotter pictures can be transferred to a radar and vice versa. Pictures received via the NavNet may be adjusted at the receiving end. Remote Controller RMC-100 Other NavNet unit (MODEL 1724C etc. Ten keys are labeled and they provide the function shown on their labels.

Press the GAIN key to show the “gain adjustment” GAIN SENSITIVITY soft keys, and the last-used adjustment window appears. The gain soft keys. AUTO MODERATE ? AUTO CALM shown depend on radar source as shown below. ? MAN 0 2. If the gain sensitivity window is not displayed, press the GAIN soft key to show the gain sensitivity setting window. Select an AUTO option according to the sea state. 4. Page 36 2. RADAR OPERATION 2.7 Range Scale The range setting determines the size of the area (in nautical miles) that will appear on your display. In addition, the range setting will also automatically adjust the range ring interval so that accurate range measurements may be made while operating on any range setting. The range, range ring interval and pulselength appear at the top left-hand corner of the display. Range scales (nm, sm) Range 0.125 0. Page 37 2. RADAR OPERATION 2.8 Pulselength The pulselength in use is displayed at the upper left corner of the display. Appropriate pulselengths are preset to individual range scales. Therefore, you are not usually required to select them. If you are not satisfied with the current pulselength setting, however, it is possible to change it for the ranges shown below. Generally, select a longer pulse for longer detection range and shorter pulse for better range discrimination. 1.5 nm, 1. Page 38 2. RADAR OPERATION 2.9 Presentation Mode This unit provides four radar presentation modes: head-up, course-up, north-up and true motion. Targets are painted at their measured distances and in their directions relative to own ship’s heading. The short line on the bearing scale is the north marker. Page 40 2. RADAR OPERATION 2.10 Measuring the Range You can measure the range to a radar target three ways: by the range rings, by the cursor, and by the VRM (Variable Range Marker). 2.10.1 Measuring range by range rings Count the number of rings between the center of the display and the target.

Up to six data boxes (two in case of large characters) may be shown, and the default data boxes are position (in latitude and longitude), course over ground, speed over ground and trip log. The user may choose which data to display, where to locate it, and show or hide it as desired. In addition, data boxes may be set independently for each display mode (plotter, radar, sounder). Page 28 1. OPERATIONAL OVERVIEW 1.9 Function Keys The function keys provide for one-touch execution of a desired function. The default function key settings are as shown in the table below. Page 29 1. OPERATIONAL OVERVIEW 1.10 Simulation Display The simulation display, for use by service technicians for demonstration purposes, provides simulated operation to help acquaint you with the many features your unit has to offer. It allows you to view and control a simulated plotter, radar and sounder picture, without position-fixing equipment, network radar or a network sounder. Page 30 1. OPERATIONAL OVERVIEW NavNet radar antenna-generated echoes (not available with the GD-1720C) 1. Select GET RADAR SIMULATION DATA, then press the EDIT soft key. 2. Select YES, then push the ENTER knob to erase simulation data and get new data. The message “NOW GETTING SIMULATION DATA. Do not turn off display unit.” appears while the unit is receiving radar data. Note: If the network radar could not be found “Radar source is not found. Cannot get demo data.” appears. Page 31 1. OPERATIONAL OVERVIEW This page intentionally left blank. Page 32 2. RADAR OPERATION This chapter covers radar operation, including the ARP (Auto Plotter) function. Press the DISP key to select a radar display. Press the RADAR STBY soft key to highlight TX on its label. Press the RETURN soft key. When the radar picture is not required, but you want keep it in a state of readiness, press the RADAR TX soft key to highlight STBY on its label. 2. Page 34 1.

To distinguish real target echoes from sea clutter, echo average performs scan-to-scan correlation. Page 54 2. RADAR OPERATION 2.21 Outputting TLL Data Target position data can be output to units of the network and shown on their plotter screen with the TLL mark (X). When ships, islands, landmasses, etc.If a target is found inside the guard zone, the guard zone type becomes an “Outward guard alarm,” and any target exiting the guard zone will trigger the audio alarm. If no target is found, the guard zone type becomes an “Inward guard alarm,” and any targets entering the guard zone will trigger the audio alarm. Press the NAV FUNC soft key. Press the RETURN soft key to finish. Note: When the watchman is activated and no guard zone is active, the message “PLEASE SET GUARD ZONE. ARP TARGET INFO INTERNAL ARP CANCEL ALL TARGETS ON ARP VECTOR MODE RELATIVE ARP VECTOR TIME 30 minutes HISTORY INTERVAL OFF CPA OFF TCPA 30 seconds AUTO ACQUISITION AREA OFF TARGET ID NUMBER OFF ARP SETUP EDIT RETURN ARP setup menu 2. Select ARP TARGET INFO, then press the EDIT soft key to show the ARP TARGET INFO window. Page 61 2. RADAR OPERATION 2. 3. 4. 5. Press the TARGET soft key. Place the cursor on the target to acquire. Press the ACQ soft key. The plot symbol changes over time as below. A vector appears about one minute after acquisition, indicating the target’s motion trend. Select TARGET ID NUMBER. Press the EDIT soft key. Select ON or OFF as appropriate. Press the ENTER soft key. Press the MENU key to close the menu. 2.25. Page 63 2. RADAR OPERATION 2.25.5 Setting vector attributes (ARP) What is a vector. A vector is a line extending from a tracked target which shows estimated speed and course of the target. The vector tip shows an estimated position of the target after the selected vector time elapses. It can be useful to extend the vector length (time) in order to evaluate the risk of collision with any target. Page 64 2. RADAR OPERATION 2.25.

Check the range ring interval and judge the distance of the echo from the inner edge of the nearest ring. The selected VRM’s indication, at the bottom of the screen, is highlighted. 3. Rotate the ENTER knob then place the VRM on the inside edge of a radar target. It is a line from the own ship position to the outer edge of the radar display area and appears at zero degrees on the bearing scale in head-up mode; it changes its orientation in the north-up, course-up and true motion modes with ship’s movement. The north marker appears as a short dashed line. Page 44 2. RADAR OPERATION 2.14 Rejecting Radar Interference Radar interference may occur when near another shipborne radar that is operating in the same frequency band as your radar. Its on-screen appearance looks like many bright dots either scattered at random or in the form of dotted lines extending from the center to the edge of the display. Use the Cursor pad to set the cursor where you want to zoom. If the target number does not exist several beeps sound and the zoom function is cancelled. To cancel, press the CURSOR LOCK soft key. Note: The zoom window blends in with the background when the background color for the radar picture is white. Press the RADAR DISPLY soft key. Press the SHIFT soft key to show the shift soft keys. Press the TARGET and TRAIL soft keys. Press the GRAD soft key to select SINGLE or MULTI as appropriate. Press the RETURN soft key twice to finish. Multitone Monotone 2.18. Page 52 2. RADAR OPERATION 2.19 Echo Stretch Normally, the reflected echoes from long range targets appear on the display as weaker and smaller blips even though they are compensated by the radar’s internal circuitry. The echo stretch function magnifies these small blips in all ranges. Echoes received from stable targets such as ships appear on the screen at almost the same position during every rotation of the antenna. On the other hand, unstable echoes such as sea clutter appear at random positions.

Use the Cursor pad to place the cursor on the sailboat icon (denotes a port or harbor) desired. 2. Push the ENTER knob. 3. Page 83 3. PLOTTER OPERATION Current (or tide) data Some Navionics GOLD charts provide for calculation of the current (or tide) data for any date. Note: You can show the selected object on the plotter display by pressing the SHOW soft key. Page 85 3. PLOTTER OPERATION 3.5.4 C-MAP charts Cursor and data display Besides its fundamental functions of providing position data, the cursor can also show information about caution area, depth area, source of data, etc. For example, the following window appears for a lighthouse. Objects Lighthouse Tower Light Underwater Rock Depth contour Depth contour Depth area Source of data Object windows 3. Use the Cursor pad to select the item desired. 4. Page 87 3. PLOTTER OPERATION Tide information The C-MAP NT chart card provides for calculation of the tide heights for any date. The services available appear. 3. Press the CANCEL soft key. This section shows you what you can do with track, from turning it on or off to changing its plotting interval. AIS ONLY (AIS equipped): Show only AIS tracks. Distance is useful for conserving track memory, since no track is recorded when the boat is stationary. 5. Press the ENTER soft key. 6. Press the MENU key to close the menu. You are asked if you are sure to change the track memory capacity. 6. Push the ENTER knob. 7. Press the MENU key to close the menu. 3.6.6 Erasing track This paragraph shows you how to erase own ship’s track and target tracks. Page 94 3. PLOTTER OPERATION 5. Move the cursor to the bottom right-hand corner of the area which you want to ease track from. 6. Press the END soft key or the ENTER knob. You are asked if you are sure to delete the track. 7. Push the ENTER knob to delete the track selected. 8. Press the MENU key twice to close the menu. Erasing own ship track by color You may erase own ship’s track by color as follows: 1. Page 95 3.

PLOTTER OPERATION 3.7 Marks, Lines Marks are useful for denoting important points such as a good fishing spot. The line style “dot” disables line drawing. Edge of lines is determined by mark shape. For example, selecting the circle shape will join lines with a circle. 4. Press the MENU key twice to close the menu. 3.7.4 Erasing marks, lines Erasing an individual mark 1. Operate the Cursor pad to place the cursor on the mark you want to erase. 2. Press the CLEAR key to erase the mark. Page 98 3. PLOTTER OPERATION 3.8 Waypoints In navigation terminology, a waypoint is a particular location on a voyage whether it be a starting, intermediate or destination point. A waypoint is the simplest piece of information your equipment requires to get you to a destination, in the shortest distance possible. This unit has 999 waypoints into which you can enter position information. Page 99 3. PLOTTER OPERATION SELECT MARK Waypoint mark shape selection window 8. Operate the Cursor pad to select shape desired. 9. Press the ENTER soft key. 10. Press the SELECT MARK and MARK COLOR soft keys in that order to open the waypoint mark color selection window. A flashing diamond mark appears over the waypoint when the waypoint is correctly selected. 2. Press the CLEAR key. You are asked if you are sure to erase the waypoint. 3. Push the ENTER knob. The waypoint is erased from the plotter screen and the waypoint list. Erasing a waypoint from the menu 1. Page 104 3. PLOTTER OPERATION 3.8.4 Changing waypoint mark size (Navionics GOLD) You may change the size of all waypoint marks to small or large (default), or you may turn them off. 1. Press the MENU key to open the menu. 2. Press the CHART SETUP and CHART CONFIGURATION soft keys. The sequence of waypoints leading to the ultimate destination is called a route. Your unit can automatically advance to the next waypoint on a route, so you do not have to change the destination waypoint repeatedly.

6 Displaying past position (ARP) This ARP can display time-spaced dots (maximum ten dots) marking the past positions of any targets being tracked. You can evaluate a target’s actions by the spacing between dots. In addition, the target plot symbol of the offending target changes to a triangle and flashes together with its vector. You may silence the audio alarm with the CLEAR key. Press the ALARM key and the message “COLLISION ALARM” appears. Page 67 2. RADAR OPERATION 2.25.9 Lost target alarm (ARP) When the system detects a lost target, the target symbol becomes a diamond and tracking is discontinued after one minute. 01 Lost target mark Canceling a lost target 1. Place the cursor on the target. 2. Press the CLEAR key. Page 68 2. RADAR OPERATION 2.26 Interpreting the Radar Display 2.26.1 False echoes Occasionally echo signals appear on the screen at positions where there is no target or disappear even if there are targets. False target situations may be recognized, however, if you understand why they are displayed. Typical false echoes are shown below. Multiple echoes Multiple echoes occur when a transmitted pulse returns from a solid object like a large ship, bridge, or breakwater. Page 69 2. RADAR OPERATION Shadow sector Funnels, stacks, masts, or derricks in the path of the antenna block the radar beam. If the angle subtended at the antenna is more than a few degrees, a non-detecting sector or blind spot may be produced. Within this sector, targets can not be detected. Page 71 INDEX This page is intentionally left blank. Page 72 3. PLOTTER OPERATION 3.1 Plotter Displays You may show the plotter display over the entire screen, in the overlay screen with the radar display, or in a combination screen. 3.1.1 Full-screen plotter display Presentation mode Nav data window (North-up) (Data changes with NAV soft key setting and cursor Trip distance status. For further details see paragraph 7.10.

Compass display The compass display, shown in combination displays, provides steering information. Page 75 3. PLOTTER OPERATION Reading the XTE (cross-track error) monitor The XTE monitor, located below the compass rose, shows the distance you are off course and the direction to steer to return to course. The own ship marker moves according to direction and distance off course. It is shown in black when the amount of cross-track error is within the XTE monitor range and yellow when it is over. Page 76 3. PLOTTER OPERATION Anemometer display The anemometer display shows mostly the same data as the compass display. It is useful for monitoring ship’s progress toward a waypoint. The own ship marker shows the relation between ship and intended course. Page 78 3. PLOTTER OPERATION 3.1.4 Nav data display The nav data display provides comprehensive navigation data, and it is shown in a three-screen combination display. The user may select what data to display and where to display it. For details see the paragraph “7.8 Nav Data Display Setup.” Appropriate sensors are required. Bars ( - -) appear when corresponding sensor is not connected. Each press of the key changes the presentation mode and presentation mode indication (top right-hand corner of the screen) cyclically in the sequence of North-up, Course-up and Auto course-up. Page 80 3. PLOTTER OPERATION 3.3 Shifting the Display The plotter display can be shifted as below. 1. Use the Cursor pad to locate the cursor at a screen edge. The screen shifts in the direction opposite of cursor location. 2. To turn off the cursor, press the CENTER soft key. These frames are called indices and they show you what parts of the chart can be enlarged in the current range. Simply place the cursor on the lighthouse or buoy mark. Lighthouse Buoy Place the cursor on a lighthouse or buoy mark. Lighthouse mark Port service icons Selected Navionics GOLD charts show services available at ports, with icons. 1.

A route name may consist of six characters; comment, 13 characters. 6. Press the LOCAL LIST or ALPHA LIST soft key to open the waypoint list. 7. Use the Cursor pad to select a waypoint, then press the ADD WPT soft key to add it to the route. 8. Repeat step 7 to complete the route. Note: To clear last-entered waypoint, press the ERASE LST WP soft key. Note: If you want to tack voyage-based points onto the end of an existing route, select the route with the Cursor pad, then press the SELECT ROUTE soft key instead of the NEW soft key. Then, go to step 6. Page 109 3. PLOTTER OPERATION 7. Enter interval desired with the Cursor pad and the ENTER knob. Press the START LOG and RETURN soft keys followed by the MENU key to close the menu. A new waypoint is created under the youngest empty waypoint number and added to the route. Page 110 3. PLOTTER OPERATION 8. Press the F R soft key to select direction to follow the waypoints of the route, forward or reverse. 9. Enter the route name of the second route as you did for the first route. 10. Press the SAVE soft key. 11. Press the MENU key to close the menu. Note: The maximum number of waypoints in a route is 35. If this number is exceeded an error message appears. In this case, delete waypoints in one or both routes so the total number of waypoints does not exceed 35. 3.9. Page 111 3. PLOTTER OPERATION Inserting a waypoint from the plotter display Inserting a waypoint before first waypoint or after last waypoint in a route 1. 2. 3. 4. 5. 6. 7. Press the MENU key to open the menu. Press the ROUTES soft key. Use the Cursor pad to select a route. Press the EDIT ROUTE soft key. Press the PLOT soft key to show the plotter screen. Operate the Cursor pad to place the cursor on the first (or last) waypoint of the route. Page 112 3. PLOTTER OPERATION 7. Operate the Cursor pad to place the cursor on the waypoint you want to remove from the route. 8. Press the REMOVE WPT soft key. The route is redrawn, eliminating the waypoint removed. 9.

Press the MENU key to close the menu. 3.9.5 1. 2. 3. 4. 5. 6. 7. Erasing routes Press the MENU key to open the menu. Press the ERASE ROUTE soft key. Page 113 3. PLOTTER OPERATION Navigating to a single quick point 1. Place the cursor on an existing waypoint (GOTO WPT soft key appears) or a new location (GOTO CURSOR soft key appears). 2. Select “1 POINT” following the procedure in the above paragraph. 3. Depending on the selection you made at step 1, press the GOTO CURSOR or GOTO WPT soft key. A solid blue line with arrows connects between own ship and destination, which is marked as “ ” for cursor-selected location or waypoint name in case of waypoint. Page 114 3. PLOTTER OPERATION 6. Press the GOTO soft key, and the plotter display appears. For either of the above methods, a solid light-blue line with arrows runs between waypoint selected and own ship’s position. Arrows on the line show the direction to follow to get to the waypoint. Waypoint data appears at the top of screen. Selecting an external waypoint You can select a waypoint (or route) entered at an external plotter connected with NMEA cable. NavChart) 6. Page 116 3. PLOTTER OPERATION 3.10.4 Following a route Selecting the route to follow 1. 2. 3. 4. 5. Press the MENU key to open the menu. Press the ROUTES soft key to open the route list. Select a route. Press the GOTO soft key to show the plotter display. The cursor is on the waypoint nearest own ship. Also, if you don’t need to return to the original course, you can go directly to the next waypoint, as in Line 2 in the figure below. In these cases, use the restart navigation function to restart navigation. Line 2 Obstacle Line 1 Original course Example of when to restart navigation 1. Press the MENU key to open the menu. 2. Page 118 3. PLOTTER OPERATION Setting speed for ETA calculation Speed, which may be input manually or automatically, is required to calculate ETA (Estimated Time of Arrival) to a destination. 1. 2. 3. 4.

Press the MENU key to open the menu. Press the LOG soft key. Press the SPEED soft key. Use the Cursor pad to select WAYPOINT SWITCHING. Press the EDIT soft key to show the waypoint switching window. Use the Cursor pad to select appropriate waypoint switching method; PERPENDICULAR, ARRVL ALM CRCL (default setting), or MANUAL. 6. Press the ENTER soft key. 7. Press the MENU key to close the menu. 3.10.5 Canceling route navigation Through the menu 1. Page 120 3. PLOTTER OPERATION 3.11 Alarms The plotter section has eight conditions which generate both audio and visual alarms: arrival alarm, anchor watch alarm, XTE (Cross Track Error) alarm, proximity alarm, speed alarm, trip alarm, water temperature alarm and bottom alarm. (The bottom and water temperature alarms, which require depth and water temperature data, may also be set on the sounder alarm menu. For these alarms see Chapter 4. Page 121 3. PLOTTER OPERATION 3.11.2 Arrival alarm The arrival alarm informs you that your boat is approaching a destination waypoint. The area that defines an arrival zone is that of a circle which you approach from the outside of the circle. The alarm will be released if your boat enters the circle. When the arrival alarm is active a red dashed circle marks the arrival alarm area. Note that the arrival alarm and anchor watch alarm can be turned on together. Page 122 3. PLOTTER OPERATION 3.11.3 Anchor watch alarm The anchor watch alarm informs you that your boat is moving when it should be at rest. When the anchor watch is active, a red dashed circle with an “X” at its center marks the anchor watch area. Alarm setting Your ship's position where you start the anchor watch alarm.: Alarm area How the anchor watch alarm works 1. Press the ALARM key to open the alarm menu. 2. Use the Cursor pad to select ANCHOR WATCH ALARM. 3. Page 123 3. PLOTTER OPERATION 3.11.4 XTE (Cross-Track Error) alarm The XTE alarm warns you when your boat is off its intended course.

When the XTE alarm is active two red dashed lines mark the XTE alarm area. Own ship position Alarm setting Destination waypoint Intended course: Alarm How the XTE alarm works 1. Press the ALARM key to open the alarm menu. 2. Use the Cursor pad to select XTE ALARM. 3. Press the EDIT soft key to open the XTE alarm window. When own ship is within a waypoint’s proximity alarm radius, the alarm sounds. The proximity mark remains on the screen until the waypoint is erased. Radius in proportion to proximity alarm radius, which is set on waypoint list 001WPT Proximity mark 1. Page 125 3. PLOTTER OPERATION 3.11.8 Grounding alarm (C-MAP specification) The grounding alarm feature continuously scans the electronic chart data in front of the boat to detect charted rocks, shoals, obstructions and land areas that could pose a threat if the vessel were to continue along its current course. The area searched is user-definable and is identified by a red triangle on the screen. Page 126 3. PLOTTER OPERATION 3.11.9 Alarm information When an alarm setting has been violated, the buzzer sounds and the speaker icon appears and is red. Press the CLEAR key to silence the alarm. You can see which alarm has been violated on the ALARM menu. In the example below the arrival alarm has been violated. 1. Press the ALARM key. The name of the offending alarm appears in the alarm information window. Plotter alarm messages and their meanings. Page 128 3. PLOTTER OPERATION 3.12 Resetting Trip Distance Trip distance is shown on the navigation data display.HF picture The higher the frequency of the ultrasonic pulse the better the resolution. Therefore, the high frequency is ideal for detailed observation of fish school.A bottom displayed with a short echo tail usually means it is a soft, sandy bottom. A long echo tail means a hard bottom. 0 - --10 --20 --30 Bottom 80 BOTTOM-ZOOM DISPLAY 0 20. Page 134 4.

VIDEO SOUNDER OPERATION Bottom discrimination display The bottom discrimination mode displays the bottom echo to help you determine bottom hardness. A bottom displayed with a short echo tail usually means it is a soft, sandy bottom. Use a higher gain setting for greater depths and a lower setting for shallow waters. Gain too high Gain proper Gain too low Examples of proper and improper gain Press the GAIN key to show the gain window, and adjust the ENTER knob or Cursor pad. Current level is shown on the bar, and the setting range is 0-100(%). Press the RETURN soft key to finish. Page 138 4. VIDEO SOUNDER OPERATION 4.4 Measuring Depth, Time The VRM measures the depth and the cross-hair cursor, time. 1. Rotate the ENTER knob to shift the VRM; counterclockwise to shift it downward, clockwise to shift it upward. You may also use the Cursor pad to shift the VRM. 2. Roll the Cursor pad horizontally to adjust the cross-hair cursor to measure time. The higher the number the higher the degree of suppression. Note that the clutter suppressor may erase weak echoes. Therefore, turn off the clutter when its use is not required. 5. Press the RETURN soft key followed by the MENU key to close the menu. Note: Unlike the signal level feature, clutter does not reduce display colors. However, if you do not wish to change the relation between weak and strong echoes, use signal level instead. 4. Page 141 4. VIDEO SOUNDER OPERATION 4.8 White Marker The white marker functions to display a particular echo color in white. For example, you may want to display the bottom echo in white to discriminate fish echoes near the bottom. 1. Press the MENU key. 2. Press the SOUNDER MENU soft key. 3. Select WHITE MARKER, then press the EDIT soft key to open the white marker window. The fractions in the window denote the number of scan lines produced per transmission. Select PRR LEVEL. Press the EDIT soft key to open the setting window. Use the Cursor pad to select SPD SENSING PRR.