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All cable connections are made when installing, so that no separate wiring connections
are required. Additionally, the mount offers 90° tilt and 360° swivel capability to adjust
the viewing angle of the unit as you move about the boat.
Real Time Sonar: Real Time Sonar is a Humminbird® technology that delivers ultra-fast
sonar transmitter/receiver operation and results in a more detailed instantaneous view
of what is under the boat. The Real Time Sonar window is a vertical band at the right side
of the display that shows the instantaneous sonar return from the transducer at a
particular instant. The RTS® Window menu option permits the user to adjust the
window to show the full sonar signal return, or just a narrower band that indicates
intensity using grayscale. Real Time Sonar relies on very fast Sonar Update Rate (Ping
Speed). See Sonar Update Rate.
Receiver: See Transmitter.
Second Return: The Second Return is a term that describes the appearance of a second
sonar return below the primary sonar return (bottom contour) at exactly twice the true
depth. The second return is caused by the same sonar energy bouncing off the bottom
once, rebounding to the water surface and then traveling back down to the bottom to
be reflected again. Second returns are more common in shallow water and over hard
bottoms; it is actually possible to see a third sonar return under some circumstances.
The second return provides useful information to help determine bottom hardness, as
areas with harder bottoms will generally create a second return. The second return can
be used as a guide to set Sensitivity when in shallower water.
Sensitivity: Sensitivity is a user feature that adjusts the sensitivity of the sonar
system to show more or less detail in the water. Higher sensitivities are often
preferred, however, when the water contains debris (silt, storm debris, etc.) and it
can be difficult to pick out targets. Conversely, if sensitivity is set too low, relevant
targets may be missed.
SONAR: SONAR is the acronym for SOund and NAvigation Ranging. Sonar technology
uses precision sound bursts transmitted underwater to determine the distance and
other attributes of objects in the water. Distance can be determined because the speed
of sound in water is constant, and the time for the signal to return is measured. Sound
also travels very quickly underwater, making sonar a responsive, cost-effective tool.
Sonar is the basic technology behind all recreational and commercial fishfinding and
depthfinding devices.