Navman FISH 4500/4600 Installation And Operation Manual page 18

Comparison of the same fish scenario displayed at different frequencies:
1 minute ago
50 kHz display
200/50 Khz display
18
30 seconds ago
200 kHz display
Note the wider
bottom trace
Dual screen
NAVMAN
Mixed display
FISH 4500/4600 Installation and Operation Manual
Now
Note the
smaller,
defined fish
arches and
more bottom
detail.