User manual SIMRAD NX40

[. . . ] Simrad NX40/45 NavStation Installation & Operation Manual Warning It is your sole responsibility to install and use the instrument and transducer(s) in a manner that will not cause accidents, personal injury or property damage. The choice, location, and installation of transducers and other components of the system are critical to the performance of the system as intended. If in doubt, consult your Simrad dealer. To reduce the risk of misusing or misinterpreting this instrument, you must read and understand all aspects of this Installation and Operation Manual. [. . . ] (If the radar Gain Mode is set to Auto and you adjust the gain level manually, the Gain Mode is changed to Manual. ) To change the radar gain level > Adjust Radar > Gain Level > 17-6-3 Changing the sea clutter mode (Manual mode) Sea clutter usually appears as confusing, random signals close to your boat on the radar window. High waves that can reflect the radar signal will produce the maximum amount of sea clutter. You can change the sea clutter mode yourself or have it changed automatically to compensate for the sea conditions. To change the sea clutter mode > Adjust Radar > Sea Clutter · Manual. Adjust the sea clutter setting yourself. The sea clutter setting is adjusted automatically to suit a harbour environment. The sea clutter setting is adjusted automatically to suit an offshore environment. Adjust the sea clutter setting yourself for a particular radar range, then have those settings stored and automatically re-used whenever you operate at that range again. 17-6-4 Changing the sea clutter level If the sea clutter level is set too low, a lot of sea clutter will be shown. If the sea clutter level is set too high, 68 Simrad NX40/45 Installation and Operation Manual small targets may not be shown in the radar window. If the sea clutter mode is set to Harbour or Offshore, and you adjust the sea clutter level manually, the sea clutter mode changes to Manual. If you are in Range Rider mode when you adjust the sea clutter level, the sea clutter mode does not change to manual but the setting is stored and used automatically whenever you use the same range again. To change the sea clutter level > Adjust Radar > Sea Clutter Level > 17-6-5 Changing the rain clutter Rain clutter consists of random dots that can merge into badly-defined echoes on your radar screen. The random signals are returned from rain, hail, sleet, or snow and can result in a confusing display. If the rain clutter is set too low, there will be excessive rain clutter shown whenever it's raining. If the rain clutter is set too high, very large targets such as the coastline will appear to be hollow. To change the rain clutter setting > Adjust Radar > Rain clutter > 17-6-6 Changing the threshold level Use this to define the threshold level of the weakest echo that you want to show on the radar screen. The threshold level is shown as a percentage. 100% is the maximum threshold level, meaning that only the strongest echoes are shown. 0% is the minimum threshold level, meaning that all echoes are shown. To change the threshold level > Presentation > Threshold > 17-7 Changing the echo expansion setting If you have several small targets in view and want to make them easier to see, use the echo expansion option. Note that the resolution decreases as the target size increases, so use this option only when target detection and visibility is more important that the quality of the display. Simrad NX40/45 Installation and Operation Manual 69 To change the echo expansion setting > Presentation > Echo Expansion · Off. Targets expanded x 3. 17-8 Turning the target trails on or off If you turn the target trails on, each target leaves a 30 second trail on the radar screen. [. . . ] MMSI - Maritime Mobile Service Identity. Unique identification number for a vessel, for use in Digital Selective Calling. 112 Simrad NX40/45 Installation and Operation Manual 24 Navigation data · · · BRG BRG Bearing to Destination: Bearing to the destination from the boat. Bearing to cursor: Bearing to cursor from boat CDI Course Deviation Indicator: When the boat is navigating to a point, the chart and highway windows show a parallel line on either side of the plotted course. These two lines are called the Course Deviation Indicator (CDI) lines. [. . . ]