User manual RAYMARINE C70

[. . . ] C-Series Display Reference Manual Document number: 81221_5 Date: August 2007 C-Series Reference Manual Trademarks and registered trademarks Autohelm, HSB, Raymarine, RayTech Navigator, Sail Pilot, SeaTalk and Sportpilot are registered trademarks of Raymarine Limited. Apelco is a registered trademark of Raymarine Holdings Limited (registered in all major marketing territories). AST, Autoadapt, Auto GST, Autoseastate, Autotrim, Bidata, Marine Intelligence, Maxiview, On Board, Raychart, Raynav, Raypilot, Raystar, ST40, ST60, Seaclutter, Smart Route, Tridata and Waypoint Navigation are trademarks of Raymarine Limited. Navionics is a registered trademark of Navionics Company, Italy. [. . . ] The lower the frequency the broader the mark. Factors impairing a fishfinder picture Although weaker than the fish or bottom echoes, your fishfinder picture may be impaired by echoes received from floating or submerged debris, air bubbles or from your boat's movements. This is known as background noise or clutter and is controlled by the gain modes (gain, color gain and TVG). Raymarine recommends that you allow your system to automatically control the ideal sensitivity level based on depth and water conditions. You can however adjust these settings manually if you prefer. For more details, please refer to page 116. Seeing a live image The standard fishfinder display shows a historical record of fishfinder echoes. If required, you can display a live image of the bottom structure and the fish directly below the transducer by using the A-Scope feature. The width of the bottom covered by the A-Scope is indicated at the bottom of the window. A-Scope provides a more precise and easier to interpret indication of the target strength. D6890-2 Chapter 5: Using the Fishfinder 99 There are three A-Scope modes which are selected for individual fishfinder windows: I MODE 1 The A-scope image is centred in the window. MODE 2 The left-hand side of the Mode 1 image is expanded to give a more detailed view. MODE 3 The A-scope image angles outward as signal width increases with depth. D6674-3 To display the A-Scope image: 1. Select the A-Scope option: Standard fishfinder image 0 A-scope image 20 A-SCOPE. . . A-SCOPE ON 30 40 Toggle to ON 50 2. Select the required A-Scope mode: A-SCOPE MODE 1 Toggle to required mode OK D8439_1 Note: Selecting A-Scope automatically switches OFF Bottom Lock and Zoom. D6675-2 100 C-Series Display Reference Manual 5. 4 Enhancing what you see You can enhance the image by applying the following options: · Change the range (Range). · Shift the selected viewing range (Range Shift). · Flatten the bottom image to help separate fish from the bottom (Bottom Lock) · Isolate bottom fish (White Line/Bottom Fill) · Pause the scrolling image or adjust the rate at which the image scrolls (Scroll Pause/ Scroll Speed) · Change the size of or remove the depth digit. Changing the range The DSM automatically adjusts the display to show the shallowest required range. Alternatively, you can select to range in/out on the image (up to the maximum depth displayed on the scrolling bottom and A-Scope images). Changes to the range are reflected in all Fishfinder windows. To select manual/auto range mode: To select and adjust manual range mode: OUT RANGE D6585-1 To return to autorange: Toggle to AUTO Shifting the image The DSM automatically adjusts the display to keep the bottom in the lower half of the display window. Alternatively, you can shift the image within the current range. Changes to the range shift are reflected in all Fishfinder windows. To shift the image: e. g. OUT RANGE D6585-1 RANGE MAN RANGE SHIFT 0FT RANGE SHIFT 5FT D8441_1 IN Toggle to MAN Press to highlight Adjust shift value as required. To return to the standard fishfinder image: RANGE AUTO Toggle to AUTO D8442_1 D8440_1 IN RANGE AUTO Chapter 5: Using the Fishfinder 101 Zooming in on the bottom If necessary you can zoom in on the bottom to display more detail. This zoom option enables you to: · Replace the standard fishfinder image with the zoomed image or display the zoomed image alongside the standard fishfinder image. · Set to zoom level to one of the pre-defined zoom factor levels or adjusted manually. · Reposition the portion of the image to be zoomed, if required. Note: When the range increases, the area shown in the zoom window also increases. Selecting a split or full screen zoomed image You can either replace the standard fishfinder image with the zoomed image (ZOOM ON) or split the screen and display the zoomed image alongside the standard fishfinder image (ZOOM SPLIT). [. . . ] Auto (SeaTalk/NMEA/Internal algorithm) or Manual 2 guard zones, selectable sensitivity level, audible alarm In Relative Motion, 66% of radius (except at max. range) 10s, 30s, 1 min, 5 min, 10 min, OFF Operator selectable with 2 levels available, OFF Rotation periods: 10, 20 or 30 scans Repetition periods: 3, 5, 10 or 15 minutes Switch AIS symbols on/off. Specify range and display heading/ speed vectors and ROT. View detailed AIS data, safety critical target data, ALR and SRM messages. [. . . ]