Furuno FCV-30 - Manual (Page 37)

1. OPERATIONAL OVERVIEW
1-27
1.17 A-scope Display
The A-scope display shows echoes at least at each transmission with amplitudes and tone
proportional to their intensities. It is useful for estimating fish specifies and bottom
composition.
1. Click Disp.
2. Click Mode.
3. Use the trackball to choose the desired A-scope display and then push the left button.
Small: A-scope display shown on right 1/10 of the screen.
Standard: A-scope display shown on right 1/8 of the screen.
Large: A-scope display shown on right 1/6 of the screen.
4. Click the OK button.
Strong reflection
(bottom)
TS
20
40
60
80
0
40
00:00:28
34 42.616' N
135 19.740' E
A-scope display
Strong reflection
(fish school)
Weak reflection
(small fish or noise)
A-scope display
To turn off the A-scope display, choose OFF at step 3 in the above procedure.