Humminbird HELIX Series Operation Manual page 104

Switch Frequencies
(CHIRP MEGA SI, CHIRP MEGA SI+ models only)
If the transducer includes more than one Side Imaging frequency, use the CHECK/INFO key to quickly change the frequency used
in the Side Imaging View. For more information see Sonar Overview and Set up Sonar.
1. With a Side Imaging View displayed on-screen, press the CHECK/INFO key.
Using the CHECK key to Switch Frequencies (CHIRP MEGA SI)
(HELIX 9 CHIRP SI GPS G2N)
frequency
label
Switch Frequencies
104
Side Imaging Sonar