Humminbird HELIX 532509-SEN_B Operations Manual: 348 Color Pages, Coil Bound
The manual covers the following models of Humminbird HELIX fish finders across the G2/G2N, G3/G3N, and G4/G4N series HELIX G2/G2N Series HELIX SONAR G2. HELIX DI G2. HELIX CHIRP DI G2. ICE HELIX CHIRP G2.