Single And Dual Frequency Fishfinding - Navman Fish 4432 Installation And Operation Manual

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4-2 Single and Dual frequency fishfinding

When to use 200 kHz
The 200 kHz frequency is best for seeing deep
bottoms, showing detail and reducing noise.
When to use 83 kHz
The 83 kHz frequency is has a wider beam –good
for locating features that can be examined in
detail at 200kHz.
Auto frequency
This shows 200kHz detail on screen, but uses
83kHz beam for locating fish further from boat.
Comparison of the same fish scenario displayed at different frequencies:
1 minute ago
19
Wide angle,
less detailed
83 kHz cone
30 seconds ago
NAVMAN
Narrow angle,
more detailed
200 kHz cone
Now
FISH 4432/4433 Installation and Operation Manual

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