GPS marine fishfinders use a graphic display screen to depict water depth and radar returns from a transducer located below the waterline at the stern of the vessel. General features of GPS marine fishfinders includes the home screen, full screen, split-zoom screen, split-frequency screen, flasher screen and numbers screen. The home screen is the main menu from where the other features are activated. GPS marine fishfinder instructions are relatively standardized from brand to brand and model to model.
Full Screen
Select "Full Screen" from the home screen to view the full screen display. The full screen display provides the most detailed, full-screen sonar image using both the duel-beam and dual-frequency transducers. This comprehensive display is the primary display used for seeing the "big picture" and includes depth, boat speed and water temperature information.
Split-Zoom
Select "Split-Zoom" from the home screen to view the split-zoom display. This display includes the full sonar image on half the screen and the ability to zoom into various areas of the sonar image on the other half. The split-zoom screen is great for checking out suspended objects in detail.
Split-Frequency
Select "Split-Frequency" from the main menu. The split-frequency option divides the screen in two, each half depicting sonar images from 50kHz and 200kHz discreet frequency imaging processors. Seeing the same area as two different frequency strengths is an effective way to sort through "clutter," if the normal dual-frequency image is unclear or cluttered with suspended returns.
Flasher
Select "Flasher" from the main menu to view the flasher screen. The flasher screen provides the most instantaneous sonar imaging displayed as a circular, sonar readout. The flasher screen is most useful when cross-referenced with the full screen display.
Numbers
Enter "Numbers" from the main display. The numbers screen does not depict sonar imaging. This interface provides a non-cluttered method of checking depth, water temperature and water speed. All of these values are depicted on the other displays around the sonar imaging.
Tags: flasher screen, home screen, from main, full screen display, main menu
