User manual NORTHSTAR EXPLORER 660

[. . . ] Explorer 660 Chartplotter and Fishfinder Installation and Operation Manual www. northstarnav. com IMPORTANT SAFETY INFORMATION Please read carefully before installation and use. DANGER !It is used to alert you to potential personal injury hazards, Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage. WARNING CAUTION CAUTION DISCLAIMER: It is the owner's sole responsibility to install and use the instrument and transducers in a manner that will not cause accidents, personal injury or property damage. [. . . ] The flat trace make it easy to compare the echo strengths shown in the bottom signals. This can help to identify the type of bottom and objects close to the bottom. The zoom bar on the far right shows the area of the history that is magnified in the zoom section: · · Use the range. or keys to adjust the zoom The Explorer 660 calculates the zoom depth automatically. It is not necessary to turn Bottom lock on for this display. Zoomed bottom Sonar history signal 40 Northstar Explorer 660 Installation and Operation Manual 9-4 Sonar 50/200 display The display shows the 50 kHz sonar history on the left and the 200 kHz sonar history on the right. Range applies to both frequencies (see section 8-6). 50 kHz sonar 200 kHz sonar history history 9-5 Sonar A-Scope display · Threshold line Unwanted noise signal · a vertical line showing the gain threshold, the weakest echo to display on the sonar history a vertical line showing the gain setting; echoes above this strength will display as the maximum signal strength Use the A-Scope while adjusting the gain and threshold settings manually (see section 8-5). Peak of bottom signal Gain line Fish recognition The echo strengths shown on the A-scope can be useful in recognising the type of fish. Different species of fish have different sizes and shapes of swim bladders. The air in the swim bladder reflects the ultrasonic pulse, so the strength of the echo varies between fish species according to the size and shape of the swim bladder. When catching fish from a school, note the species and the strength of the echo that it returns on the A-scope. Then, when that particular echo is seen again, it is likely to be the same fish species. Sonar history A-scope display The display shows the sonar history on the left and the A-Scope display on the right. The A-Scope shows: · the strengths of echoes from different depths - the longer the horizontal line the stronger the signal Bottom type The shape of the echo strengths in the A-Scope can help you to recognise the type of bottom. Northstar Explorer 660 Installation and Operation Manual 41 10 Data display The data display has eight large numeric data fields, four lines with two fields per line, plus a graph of the water temperature and depth over the last 20 minutes. To show the data display, press DISPLAY, select Other, then select Data. To select what data is displayed: 1 2 Press MENU and select Data setup. Change a data field: i ii Press the cursor keys to highlight the field. Press ENTER to display a menu of the data that can be shown in the field. iii Select the data to show in the field; select None to leave the field empty. Press ESC. 42 Northstar Explorer 660 Installation and Operation Manual 11 Fuel display Used shows total fuel used since this was last reset with the Clear Used command. For twin engine installations, the fuel flow for each engine is shown separately. This is useful for checking that both engines are under the same load. Note that the Explorer 660 uses a paddlewheel transducer to measure speed, used to calculate the fuel economy. Therefore, calibration of the boat speed measurement is essential for an accurate fuel economy reading. See section 15-11. To show the Fuel display, press DISPLAY, select Other, then select Fuel. The Fuel display can only be used when the optional single or twin engine fuel kit has been installed. [. . . ] NavBus - A way of connecting Northstar instruments together to share data (see section 16-6). NMEA 0183 - A standard for interfacing marine electronic devices (see section 16-6). Route: Two or more waypoints linked in sequence to form a course for the boat (see section 6). User card - A plug-in card that stores waypoints, routes and tracks (see section 1-2). [. . . ]