21.11 HD and SuperHD radar adjustmentsYou can use the presets and other functions to improve the quality of the radar picture.The following settings are available from the Radarmenu and apply to HD radomes, HD and SuperHDopen array scanners:Menu Item Description OptionsPreset Mode The radar gain presets enable you toquickly select pre-configured settingsto achieve the best picture in differentsituations. Raymarine stronglyrecommends the use of these presetsto achieve optimum results.• Buoy — a special mode that enhances the detection of smallobjectslikemooringbuoys. Itisusefulatrangesupto0.75nm.• Harbor — this is the default mode. This setting takes accountof land clutter so that smaller targets, like navigation buoys,are not lost.• Coastal — accounts for the slightly higher levels of sea clutteryou might encounter out of harbor and adjusts the radardisplay accordingly.• Offshore — automatically adjusts for high levels of sea clutter.• Bird Mode — a special mode that helps you to identify flocksof birds, useful when identifying suitable fishing locations, forexample.Note: Bird Mode requires a SuperHD open array withsoftware version 3.23 or above or an HD radome.Rain The radar scanner detects echoesfrom rain or snow. These echoesappear on screen as countless smallechoes continuously changing size,intensity and position. Turning therain clutter function On suppressesthe bulk effect of rain returns fromaround your vessel, making it easierto recognize other objects. You canadjust the intensity of this settingbetween 0 and 100%.• On — enables the Rain function and allows you to adjust thesetting between 0 and 100%.• Off — disables the Rain function. This is the default.Adjust Preset Each of the gain presets can bemanually adjusted using gain, colorgain and sea clutter functions.• Gain — enables you to use a preset in automatic mode, or toadjust its gain manually between 0 and 100%.• Color Gain— adjusts the intensity (color) of displayed targets,but does not affect the number of targets displayed. Increasingthe color gain causes more targets to be displayed in the samecolor, which may help you to determine whether an object isan actual target, or just background noise. Reducing the colorgain may provide better target detail and detection.• Sea — radar echoes from waves around your vessel canclutter the center of the radar picture, making it difficult todetect real targets. Adjusting the sea gain reduces thisclutter for up to 5 nautical miles (depending on wave and seaconditions) from your vessel.• SuperHD Controls — for SuperHD scanners only:– Antenna Boost: scales the effective antenna size. Atzero, the effective antenna size matches its actual size.At 95%, the effective antenna size is doubled. Increasingthe effective antenna size separates targets that appearmerged at lower settings.– Power Boost: adjusts effective transmit power. At zero, theradar operates at its standard power (4 kW or 12 kW). At90, the effective power is increased by a factor of at leasttwo. Increasing the power makes targets more distinct fromnoise. For maximum benefit, reduce power boost to preventsaturation of strong targets.Radar application 331
