Fishfinder app ContentsSonar technologiesSonar module rangeRange capabilities of Raymarine transducers/sonar channels are shown below.Fishfinder app overviewThe Fishfinder app displays a visualization of the echoes received from a Sonar module and transducer. The Fishfinder app is compatible with Traditional, CHIRP, DownVision™, SideVision™ and RealVision™ 3D sonar modules and transducers. The Fishfinder app builds an underwater view of bottom structure and targets in the water column.Opening the Fishfinder appThe Fishfinder app is opened by selecting a page icon from the Homescreen that includes a Fishfinder app.Sonar transducer calibrationSonar transducers should be calibrated to ensure that accurate readings are displayed on the MFD / chartplotter.Sonar channelsThe sonar channels that are available depend on the Sonar module and transducer you have connected.Placing a Waypoint (Sonar, DownVision and SideVision)When you observe something of interest in the Fishfinder app you can place a waypoint at its location so that you can find the area again.Zoom modeZoom mode allows you to magnify a specific section of the water column so that objects or structure appear larger on screen. At maximum zoom the magnified section will show a 1 ft (0.3 m) column of water.Fish detectionFish detection options are available when using a compatible Raymarine® sonar module with a Raymarine® or Airmar conical beam capable sonar transducer.Sonar scroll back (history)You can “scroll back” in the Fishfinder app to view sonar history.Sonar sensitivity controlsOptimum performance is usually achieved using the default settings. You can adjust the image using the Sensitivity controls to improve the displayed image. Sensitivity setting adjustment is also applied to the sonar history.Frequency tuningWhen using an Airmar® CHIRP transducer you can adjust the frequency of the ‘Tuned’ sonar channels (e.g.: 50 kHz, 200 kHz channels.), using the Tune frequency control.SmartDrift™SmartDrift™ calculates an accurate starting point for your boat if you want to drift over a specific spot after a specified time interval has elapsed.Fishfinder settings menuThe table below lists settings applicable to the Fishfinder app and their location within the app Settings menu. The settings available are dependant upon the Sonar module in use.Sonar display settings menuThe Sonar display settings menu provides options for how the Fishfinder screen is presented and also some channel specific presentation options.Transducer settings menuSounder settings menuFish detection settings menuPage settings menuThe page settings menu allows you to configure data overlays and, when applicable, adjust the position of the split on pages containing multiple apps.Previous topic: Sailing featuresNext topic: Radar app