Humminbird 531338-1_A, 47 manual 2D Sonar View, Real Time Sonar RTS Window

M47_Man_Eng_531338-1_A.qxd 12/13/2004 12:35 PM Page 16

2D Sonar View

2D Sonar View is a 2-dimensional view that presents a historical log of sonar returns. Depth is always displayed. Readouts for temperature and speed are automatically displayed if the appropriate accessory is connected. 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 to the left. A Digital Depth Readout is displayed in the upper left corner. A scale with Upper and Lower Depth Range readouts appears along the right edge of the Sonar View. The scale indicates the distance from the surface of the water to a depth range sufficient to show

Real Time Sonar (RTS®) Window

A Real Time Sonar (RTS®) Window appears on the right side of the display in the 2D 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 bottom. Depth Range is automatically selected to keep the bottom visible on the display, although you can adjust it manually as well (see Sonar X-Press™ Menu). Six additional Digital Readouts display information from optional-purchase accessories. These information boxes can be customized to show only the information desired (see Setup Menu Tab, Select Readouts).

When in 2D Sonar View, your unit operates like a typical depthsounder. There are, however, several exceptions. The six-beam 53 degree transducer allows you to search for fish with a much wider area of coverage. Only the two center beams provide sonar returns for the bottom contour shown on the display. The fish symbols shown in the 2D Sonar View are the same as those used in the 3D Sonar View providing information on the location of the fish relative to the boat (see Sonar Menu Tab, Fish ID+). Use the 2D Sonar View for identifying structure and bottom hardness.

2D Sonar View

Depth	Upper Depth
	Range
Speed	RTS® Window
Temperature
Triplog
Sonar History	Cursor
Window	Voltage
Cursor Dialog Box	Lower Depth
	Range

Freeze Frame - Pressing any arrow on the 4-WAY Cursor Control key will freeze the screen in the 2D Sonar View 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 only available in the 2D Sonar View.

The Narrow RTS® Window indicates the sonar intensity through the use of grayscale. The grayscale used matches the bottom view grayscale setting used in the sonar history window (i.e. Inverse, StructureID®, WhiteLine®, Bottom Black). The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale.

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. The Wide RTS® Window does not make use of grayscale.

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