Eagle Electronics FISHMARK 320 - Manual (Page 10)

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the Sonar Features menu command. Then press the Enter key."
Step 2 would mean: "Press the right arrow key (for dual-frequency
units) or press the right arrow key followed by the down arrow key (for
single-frequency units) to select (highlight) the Fish ID symbols com-
mand. Next, press the Enter key, then press the Exit key twice."