Humminbird 1000 manual Real Time Sonar / Chart Window, Real Time Sonar RTS Window

Chart Window

USING THE LEGEND 1000 SERIES

REAL TIME SONAR™ / CHART WINDOW

The sonar returns received by the LEGEND 1000 SERIES are displayed along the depth range scale in a REAL TIME

SONAR™ (RTS) WINDOW and CHART WINDOW. The RTS WINDOW

displays new sonar information within the transducer cone in an expanded, easy-to-see format; the CHART WINDOW logs old RTS WINDOW information to show a contour view of the bottom and structure.

Real Time Sonar™ (RTS) Window

The REAL TIME SONAR (RTS) WINDOW
shows instantaneous sonar
returns from the bottom,
structure and fish that are	Intense
within the transducer beam.			Structure
	returns
The RTS WINDOW updates with
			Bottom
new sonar information much	Less intense
more quickly than the CHART	returns
WINDOW - up to 20 times per
second in shallow water. The
RTS WINDOW responds to
quickly-changing depths in a
way similar to a flasher type
sonar display. Interpreting
the RTS information requires some
skill; comparing the RTS data with the
data in the CHART WINDOW, however, makes
the RTS information easy to			Fish
understand.
The RTS WINDOW plots the depth and			Soft
intensity of a sonar return. Sonar			Bottom
intensity is indicated by the length of
the horizontal lines, while depth is
indicated by the vertical placement of
the lines next to the depth range scale.
The intensity of the sonar return is
divided into eight levels of grayscale.
The most intense returns are shown in
black; less intense sonar returns are
shown in progressively lighter shades		Hard
of gray.		Bottom

The combination of the length of the lines and the gray scale level helps to identify the bottom composition and structure. The bottom displays as the largest grouping of black horizontal lines, and typically has gray lines

underneath. A harder bottom shows less gray below; a soft bottom shows more gray below. Structure appears above the bottom as a cluster of lines with varying lengths and gray shades.

Fish appear as smaller groupings of sonar returns between the bottom and surface. Often, large fish within a structure will show as a strong return within a grouping of smaller returns. When the boat is stationary or drifting very slowly, the RTS WINDOW can show the movement of the fish through the transducer beam. Moving fish appear as smaller groups of lines that become progressively larger lines, or vice versa. A grouping of lines moving vertically indicates a fish changing depth.

The width of the RTS WINDOW can be adjusted to your preference. Selecting a wider RTS WINDOW shows greater differences between the strength of the sonar returns, although doing this will reduce the amount of history on the display. See CONTROL PANELS for details on adjusting

the RTS WINDOW.

The Chart Window

The CHART WINDOW creates a historical log of sonar returns from stored RTS

information. As the boat moves, variations in the depth and sonar return changes are charted to form an image of the bottom contour. The most recent sonar returns are charted on the right side of the window; as new information is received, the older information is moved across the display.

The CHART WINDOW also	Hard	Soft	Rocky
indicates the composition	Bottom	Bottom	Bottom
of the bottom. A hard

bottom, such as compacted sediment or flat rock, appears as a dark, thin line across the display. A soft bottom, such as mud or sand, appears as a thicker line that contains a transition from darker to lighter grays. Bottoms made up of many rocks have a broken, random appearance.

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