Filter
Top Products
56
Glossary
Sonar Terms:
Alarm, Depth: Depth Alarm is a user-controllable, audible alert that sounds when
depth is less than or equal to the setting.
Alarm, Temperature: Temperature Alarm is a user-controllable, audible alert that
sounds when the water surface temperature equals the setting.
Backlight: Backlight is a user-controllable illumination for the LCD for night andlow
light use.
Beam (Sonar Beam): A sonar beam is the cone-shaped projection of sound waves
formed as sound travels underwater. See Cone Angle.
Big Digits View: Big Digits View is a Humminbird® feature that displays the sonar
graph and enlarged digital readouts for easy readingfrom a distance. This is a great
tool when monitoring the digital depth is important - such as with higher boat
speeds, orwhenviewing theunit fromadistance. Whenspeed inputisavailable, the
Big Digits View also shows the TripLog. See TripLog.
Bottom Black: Bottom Black is a Humminbird® feature that "fills in" the area of the
display below the bottom contour. Bottom Black is preferred by some anglers
because ofits highcontrast andeasy readability, eventhough itcan obscurebottom
hardness information.
Bottom Contour: BottomContour isthe profile ofthe bottomgraphed tothe display
as the depth changes.
Bottom Hardness: Bottom Hardness is the density (or composition) of the bottom,
which canoften bedeterminedby interpretingthe mainsonar return.Varying levels
of hardness can be determined by interpreting the "thickness" of the sonar return.
Hard returns appear thinand black, softer returns appear thickerand less black. It is
important to note that a sonar return from a sloping bottom can have the
appearance of a softer bottom.
Cavitation: Cavitationisthe effectof airbubbles createdas thepropellerrotates and
the boat moves through the water.