| A Furuno fishfinder is a type of fathometer, both being specialized types of echo sounding systems, a type of Active SONAR. ('Sounding' is the measurement of water depth, a historical nautical term of very long usage.) The Furuno Fishfinder uses active sonar to detect fish and 'the bottom' and displays them on a graphical display device, generally an LCD screen. In contrast, the modern fathometer (from fathom plus meter, as in 'to measure') is designed specifically to show depth, so may use only a digital display (useless for fish finding) instead of a graphical display, and frequently will have some means of making a permanent recording of soundings (which are merely shown and subsequently electronically discarded in common sporting fishfinder technology) and are always principally instruments of navigation and safety. |
The distinction is in their main purpose and hence in the features given in the Furuno Fishfinder. Both work the same way, and use similar frequencies, and, display type permitting, both can show fish and the bottom. Thus today, both have merged, especially with the advent of computer interfaced multipurpose fishfinders combining GPS technology, digital chart-plotting, perhaps RADAR and electronic compass displays in the same affordable sporting unit.
Furuno Fishfinder Online Information:
● Furuno Fishfinder Frequently Asked Questions
● Furuno Fishfinder display screens - what are they telling you?
● Understanding Your Furuno Fishfinder Screen (A-Scope)
● Understanding Your Furuno Fishfinder Screen (Split Screens)
● Furuno Fishfinder Transducer and Speedlog Primer
● Furuno Fishfinder Transducer Mounting and Installation