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Several fish in shallow water tend to display as randomly stacked blocks of pixels. • Wave motion may result in distorted fish arches 4-4 Gain Gain (sensitivity) controls the amount of detail displayed on the FISH 4432/4433. Understanding how to set suitable Gain settings is important for optimum performance. The Navman fishfinder has three gain modes, Cruising, Fishing and Manual. • Cruising Mode Use this mode to show only the bottom and large fish. • Fishing Mode Use this mode to show as much detail as possible. • Manual Mode The gain can be adjusted by the user to compensate for water depth and clarity. High Gain settings may amplify the normal background noise until it appears as random pixels. Changing between Cruising, Fishing and Manual To change between Cruising, Fishing and Manual 1. From any Sonar display, press ENT. 2. Use the or cursor keys to highlight mode option, then use the cursor key then select desired option from list. Adjusting Gain and Threshold settings The gain settings and the threshold settings can be adjusted independently for each frequency (83kHz and 200 kHz). Use threshold to eliminate colors in the sonar display. 1. From any Sonar display, press ENT. 2. Use the or cursor keys to highlight the desired setting, then use the cursor key to change it. Note: The Gain mode automatically changes to Manual Gain if the gain or threshold settings are adjusted by the user. Obtaining the best results To obtain the best detection capability for both fish and bottom we recommend the use of the Sonar A-Scope display: 1. Set the threshold to 0%. 2. Adjust the gain until the threshold line is just to the right of the unwanted noise. Gain Threshold line Unwanted signal Gain line FISH 4432/4433 Installation and Operation Manual NAVMAN 4-5 Range Range is the vertical depth displayed on the FISH 4432/4433. The Navman fishfinder has two range modes, Auto Range and Manual Range: • In Auto Range, the fishfinder adjusts the depth range automatically so the bottom is always shown in the lower part of the display. The use of Auto Range is recommended for normal conditions. • In Manual Range, the fishfinder shows only a selected depth range. In areas of rapidly changing bottom depth, such as the sea floor around pinnacles, it can be useful to prevent the display from rescaling to always show the bottom. If the bottom is deeper than the specified depth range, it will not be shown on the display. Changing the Range Mode Press the + or - key to change to Manual Range mode and to increase or decrease the range to the desired depth. Values can be set between 10 ft. (3 m) to 1000 ft. (300 m). To change from the current mode: 1. From any Sonar display, press MENU to display the Options menu. 2. Highlight Range, then use the cursor keys to select Autoor Manual. 3. Press ENT to confirm. Tip: To quickly enlarge from manual to auto- range hold down + or - key for 1.5 seconds. Zoom Range and Zoom Offset On the Sonar Zoom and Sonar Bottom displays, a vertical bar is shown on the far right of the display. This is the zoom bar. The zoom bar shows the zoom range; that is, the area that is magnified. Use the or cursor keys to adjust the zoom range. Use the or cursor keys to adjust the zoom offset. NAVMAN FISH 4432/4433 Installation and Operation Manual 5 The Displays 5 The Displays Press DISP to show the Display menu. Use or The Display menu is summarized here and each to select display tab, then select a particular display is shown in the following sections. display using the or cursor keys. Most displays have an Options menu so that relevant features can be changed quickly. The Display menu Note: Refer to Section 3-2 Setup > Sonar, for information about customizing features on the sonar displays. Sonar display at a single or mixed frequency (section 5-1) Sonar split display with zoomed section (section 5-2) Show zoomed section of sonar Sonar flat bottom trace in zoomed section (section 5-3) Sonar split display with 83 and 200 frequencies (section 5-4) Sonar split display with echo strength (section 5-5) Show perspective view of sonar (section 5-6) Fuel data (section 5-7) Water temperature and depth history and boat data (section 5-8) Product and wiring information (section 5-9) 5-1 Sonar display Data header, set up to show the boat speed, sonar status etc. Depth (medium size digits) To show the Sonar display, press DISP and select Sonar Tab, select Sonar and press ENT. This display scrolls from right (most recent echoes) to left (oldest echoes) at the selected frequency (see section 3-2 Setup > Sonar). To change items, press MENU until the Options menu is shown. Gain is explained in section 4-4 Gain. Range is explained in section 4-5 Range. A-scopeis explained in section 5-5 Sonar A-Scope display. Data header The data header can be selected on or off. When selected, it is a customizable feature that can be used to display up to 9 data items, such as alarms or water temperature. Surface Fish symbols with depth Bottom Ran...
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