Lowrance HOOK-4 - Sonar Frequencies and Ping Speed; Ping Speed Adjustment

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Sonar Operation | HOOK series
Sonar Operation | HOOK series
Sonar frequencies
50 kHz
Best depth penetration with
lower resolution
83 kHz
Wider cone angle provides
more bottom coverage and
easy lure tracking
200 kHz
Highest sensitivity and best
target separation in shallow
water
Low CHIRP
Provides the best depth pen-
etration with lower resolu-
tion images
Medium CHIRP
Better depth penetration
than High CHIRP with minimal
loss of target separation
High CHIRP
Better resolution in shallow
water than Medium CHIRP
Custom high
Selects a custom single
frequency from within High
or Low frequency ranges to
help reduce/eliminate inter-
ference from other CHIRP
transducers
Custom medium
Ping speed
Controls the rate the transducer uses to send sonar
waves into the water.
Ping speed adjustments can help reduce
interference from other transducers. When using
shing modes, ping speed settings are optimized
for the selected shing conditions, so in most
cases, adjustments are not necessary.