Real Time Sonar (Rts®) Window; Freeze Frame; Bottom Presentation - Humminbird 777C2 Operation Manual

531474-1_A_777c2_English.qxd 11/3/2005
Real Time Sonar (RTS®) Window
A Real Time Sonar (RTS®) Window appears on the right side of the display in the
Sonar View only. The RTS® Window always updates at the fastest rate possible for
depth conditions and shows only the returns from the bottom, structure and fish
that are within the transducer beam. The RTS® Window plots the depth and
intensity of a sonar return (see Sonar Menu - RTS® Window).
The Narrow RTS® Window
indicates the sonar intensity
through the use of colors. Red
indicates a strong return and
blue indicates a weak return.
The depth of the sonar return
is indicated by the vertical
placement of the return on
the display depth scale.

Freeze Frame

Freeze Frame - Pressing any arrow on the 4-WAY Cursor Control key will freeze the
screen and a cursor will be displayed on the screen. The cursor can be positioned on
the display using the 4-WAY Cursor Control key to determine the depth of any sonar
return. The RTS® Window continues to update in Freeze Frame. In addition, see the
effects of menu setting changes with Instant Image Update. Pressing EXIT will exit
Freeze Frame and the display will start to scroll. Freeze Frame is available in Sonar,
Sonar Zoom and 200/83 kHz Split Sonar Views.
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The Wide RTS® Window
indicates the sonar intensity
through the use of a bar
graph. The length of the
plotted return provides an
indication of whether the
return is weak or strong. The
depth of the sonar return is
indicated by the vertical
placement of the return on
the display depth scale.
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Bottom Presentation

As the boat moves, the unit charts the changes in depth on the display to create a profile
of the Bottom Contour. The type of bottom can be determined from the return charted
on the display. A Hard Bottom such as compacted sediment or flat rock appears as a
thinner line across the display. A Soft Bottom such as mud or sand appears as a thicker
line across the display. Rocky Bottoms have a broken, random appearance.
Bottom Contour Profile with RTS® Window.
Temp/Speed Accessory is optional.
Hard Bottom
Rocky Bottom
The sonar returns from the bottom, structure and fish can be represented as either
WhiteLine® or Structure ID®. See Sonar Menu Tab: Bottom View for details on how
to set the bottom view.
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Soft Bottom