Furuno 455T-TM903 Transducers. Furuno 455T-TM903 Literature Download Quick Reference Guide. Transom Mount High-Frequency CHIRP Side-Scan Transducer for NavNet TZtouchXL. The 455T-TM903 is a Transom Mount transducer that works with the built-in CHIRP Side-Scan functionality on your NavNet TZtouchXL TZT10X, TZT13X, or TZT16X MFD.
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