Furuno GP-1600F - Manual (Page 18)

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A-scope display
This display shows echoes at each transmission with amplitudes
and tone proportional to their intensities, on the right 1/3 of the
screen. It is useful for estimating the kind of fish school and sea-
bed composition.
200k
160
0
50
100
150
200
68.3
CSE 180.0° SPD 16.8kt
DEP 113.6 ft TMP 16.0 °C
2D
12.0V
POS 34° 26.245' N 135° 41.232' E
Normal
display
A-scope
display
Figure 1-16 A-scope display (right side)