Identifying False Echo Returns | Raymarine Marine GPS System

RayTech Navigator User’s Guide

Controls to Adjust the Radar Picture

Control	Option	Function	Default Setting
GAIN	GAIN	Controls the strength of the target returns	AUTO
	SEA	Reduces sea returns	AUTO-HARBOR
	RAIN	Reduces close rain or snow returns	OFF
	FTC	Reduces distant rain or snow returns	OFF
SEA	SEA	Reduces sea returns	AUTO-HARBOR
MULTI	TUNE	Fine tunes the receiver	AUTO
TARGETS	INT REJ	Turns interference rejection on/off	ON
	EXPANSION	Turns target expansion on/off	OFF
	WAKES	Turns wakes on/off and selects wakes length	OFF

Identifying False Echo Returns

Not all echoes are direct returns to the radar antenna. Occasionally signals appear at positions where there is no actual target. These are called false echoes, and may be caused by side lobes, ghost images, indirect echoes or multiple echoes.

This subsection briefly describes the echo patterns that can be produced by false echoes and the likely cause. It should be noted that the radar operator, through observation, practice, and experience, can generally detect these conditions very quickly. These effects can usually be minimized using the radar controls.

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Raymarine Marine GPS System manual Identifying False Echo Returns, Controls to Adjust the Radar Picture

Contents

Distributed by Navigator Disclaimers and Warranty Technical Accuracy Guide Description Generall Conventtiions Conventions Telephone Europe Telephone United StatesEmail Address Mailing AddressesPage Table of Contents Using Navigators Interface Customiiziing the Interface Working With Charts and Routes4-1 Measurriing Range and Bearriing Usiing VRM//EBL Usi ing Sonar Wi ith Navi igator Appendix a Connecting Peripheral Instruments Welcome to RayTech Navigator Chapter Introduction Multiple Chart Formats for Flexibility Easy Marine Navigation Using Routes and Waypoints Comprehensive Weather/Oceanographic Reporting Navigator’s Toolbars, Functionbars, and Databoxes Contour Display Sail Racer Module Optional Modules Fishing Pro Module Before You Begin Overview Minimum System Requirements Setting Your PC Monitor’s Colors for Best DisplayHardware Requirements To install Navigator from a CD Installing NavigatorInstalling From a CD InstallShield Wizard Welcome Screen InstallShield Wizard Customer Information Screen InstallShield Wizard Setup Type Screen ISW Custom Setup screen choices are defined as follows InstallShield Wizard Ready to Install Screen Installing From the Internet Main Interface Component Descriptions Chapter Using Navigator’s Interface Navigator’s Main Interface Waypoint Menu Drop-Down MenusFile Menu Tools Menu Route Menu View Menu Tools/Pre-Start Menu Help Menu Window Menu Waypoints and Routes Toolbar ToolbarsStandard Toolbar Alarm Toolbar Charting Toolbar Tides/Currents Toolbar Animation Toolbar Fishing Toolbar View Toolbar Weather Toolbar Yacht Racing ToolbarPre-Start Toolbar Standard Functionbar Functionbar MenusPathfinder Panel Toolbar 22. Standard Functionbar Menu Hierarchy Marks Button Route ButtonGoto Button Second-Level More Button Top-Level More Button Weather Animation Button File Button Radar Functionbar Setup Button 31. Radar Functionbar Menu Hierarchy Marpa Button Heading Mode ButtonTargets Button 35. Radar Functionbar Gain Button Descriptions Gain Button 36. Radar Functionbar VRM/EBL Button Descriptions VRM/EBL Buttons Tune Button Sonar Functionbar 38. Sonar Functionbar Menu Hierarchy Zoom Button Frequency Button Scope Button Bottom Lock Button 43. Sonar Functionbar VRM/EBL Button Descriptions 44. Sonar Functionbar Alarm Button Descriptions Alarm Buttons Customizing the Interface Using the Customize Dialog Box To customize drop-down menus Commands Tab Toolbars Tab To reset Toolbars to original default settingsTo display the Toolbars tab To create and name a custom Toolbar 46. Customize Dialog Box Toolbars Tab Keyboard Tab To associate keystrokes with commands 48. Customize Dialog Box Menu Tab Menu Tab To display the Options tab Options Tab About Using Charts with Navigator Installing Charts Installing MapTech PCX and NOAA/BSB Charts Where to Store Charts RayTech Settings Dialog Box Chart Installer Screen Chart Manager Screen 1 Showing Installed Charts Working With Routes To create and name a route Creating a Route Beginning a Route Completing a Route To add a waypoint to a route Editing Routes and WaypointsWaypoint Basics Adding, Moving, and Deleting 11. Edit Route Dialog Box Adding a Waypoint to a Route 12. Moving a Waypoint To move relocate a waypoint 13. Moving the Waypoint You Are Approaching To The Vessel 15. Placing a Waypoint At The Vessel’s Current Position To put a new waypoint at your vessel’s current position 17. Placing a Waypoint At The Cursor’s Current Position To put a new waypoint at the cursor’s current position 18. Placing a Man Overboard Marker 19. Deleting a Waypoint To delete a waypoint from a route Modifying Waypoints To modify a waypoint’s display characteristics Working With Charts And Routes To set one waypoint as relative to another Setting Relative Waypoints To return a waypoint to its relative coordinates To temporarily set one waypoint to specific coordinates To create a new waypoint group Working With Waypoint Groups 22. Renaming a Waypoint Group To rename a waypoint group 23. Deleting a Waypoint Group To delete a waypoint group 24. Showing or Hiding a Waypoint Group To display or hide a waypoint group To retrieve waypoints from the recycle bin Using the Waypoint Recycle Bin 26. Retrieving Waypoints From The Recycle Bin Chapter Advanced Navigator Functions Using Radar With Navigator RayTech Navigator User’s Guide Displaying the Radar Screen To overlay radar data on top of a chartDisplaying the Top Line Status Header To display radar data in a separate window To display the Control Panel Displaying the Control Panel Using the Pathfinder Panel Toolbar Changing the Range Using the Range Control Radar Range Scales Standard Range Scale Radar Range Determining Actual Radar Range Interpreting and Adjusting the Radar Picture Identifying False Echo Returns Controls to Adjust the Radar Picture Indirect False Echoes Side Lobes Blind Sectors or Shadow Effect Multiple Echoes Radar Gain Control To adjust the Gain Radar Sea Clutter Display Sea Clutter Control To adjust Sea Clutter control Radar Rain Clutter Display Rain Clutter Control To adjust the Rain and FTC controls To tune the radar Tuning the ReceiverThat you leave the Tune control in Auto mode Changing the Target Display To change target mode settings Target Expansion Interference Rejection Target Wakes Measuring Range and Bearing Using VRM/EBL RayTech Navigator User’s Guide To access VRM/EBLs Using VRM/EBLMeasuring Range and Bearing to Target from Vessel Click To Move Click Moving a VRM/EBLTo move a VRM or EBL To place a mark symbol at the current vessel location To place a mark symbol at the cursor positionPlacing Marks To remove marks Introduction to Marpa Safety Notices Target Data Risk Assessment Radar Range Scales Target Vector and History To acquire a Marpa target Acquiring a Marpa Target To remove a target from the Marpa database Using the Marpa Dialog BoxDeleting a Marpa Target To clear a target To acquire a targetTo view target data the Marpa List To view selected target data in the Marpa box To display sonar data in a separate Navigator window Using Sonar With Navigator Pathfinder Panel for Sonar To display the depth of the fish Fish Indications Effect of Frequency and Boat Speed Bottom Indications To toggle on and off the Target Depth ID Depth Target ID To change the background color Selecting the Background ColorChanging the Scroll Speed To pause the scrolling display To change the scrolling speed To adjust the range and shift values Adjusting the Range Control Selecting the Frequency Selecting the Power SettingTo change the power setting To change the frequency Adjusting Display Gain Sensitivity To adjust the Color Gain Adjusting Color Gain To remove the A-Scope image Using the A-ScopeTo display the A-Scope image To display the Bottom Lock image Using Bottom Lock Using Zoom Using the White LineTo switch the white line feature on and off To use zoom Using Alarms To set an alarm Using VRM To use the VRM To Place a Waypoint Using Waypoints 13. Typical Polars Plot Screen Using Polars to Optimize Your Performance Entering and Editing Data Collecting Data 14. Polar Parameters Screen Polar Parameters Screen Advanced Navigator Functions 15. Data Tests Screen Data Tests Screen Advanced Navigator Functions RayTech Navigator User’s Guide ForestayStrain Displays only those tests that To graph a Polar plot, do the following How to Graph and Read a Polar Plot RayTech Navigator User’s Guide 18. Polar Plot Example Screen 19. Upwind Plot Screen Using the Upwind, Downwind, and Vmc Plot Screens 20. Downwind Plot Screen 21. Vmc Plot Screen Boat Speed Calibration Calibrating to Ensure Data Accuracy Apparent Wind Angle Calibration Compass Calibration True Wind Angle Calibration 22. Twa Corrections Screen 23. Tws Corrections Screen True Wind Speed Calibration Using the Engine Instrument Panel 24. Single Engine Instrument Panel with Tachometer Displaying the Panel 25. Engine Panel Settings Screen Showing Instruments Tab Configuring the Panel 26. Engine Panel Setting Screen Showing Panel Tab Appendix a Connecting Peripheral Instruments Figure A-1. Raymarine Nmea Connection Cable, Part No. E86001 Connecting to Instruments Via an Nmea Cable Table A-1. Connecting Navigator Directly to GPS System Connecting Directly to a GPS Connect Cable Color To Nmea Instrument Lead Connecting Directly to NMEA-Equipped Instruments Table A-3. Connecting Navigator Directly to Radar System Connecting Directly to Radar Table A-4. Connecting Navigator Directly to Autopilot System Connecting Directly an Autopilot Connecting to a Raymarine Direct SeaTalk Interface Connecting Specific Instruments and Devices Figure A-1 and Table A-5 Connecting to a Raytheon Autohelm System Table A-7. Connecting Navigator to a B&G Nmea FFD Display Connecting to B&G InstrumentsTable A-6. Connecting Navigator to a B&G Performance Board Table A-8. Connecting Navigator to a KVH Race Box Connecting to KVH Instruments Connecting to Ockam Instruments Nmea Basics Basic Nmea and RS-232 Cabling Principles RS-232 Basics RayTech Navigator User’s Guide Preventing Interference and Crosstalk Circuit Grounding IssuesProper Cable Shielding Pin Serial Direct Connecting With a KiwiTech Cable RayTech Navigator Version Raymarine Interim Sheet Click Send Now Click Save Now Create Route Charting Enhancements New Databoxes Other Vessel Tracking DataTrak Enhancements