The Speed and Depth are pods part of the ST290 System Starter pack
The intelligent ST290 speed pod provides precise speed measurements with a multi point speed calibration for high accuracy at both high and low speeds.
Speed and Depth transducers are purchased separately from the ST290 transducer pods.
ST290s intelligent transducers deliver optimum performance thanks to advanced calibration techniques and super-fast data communication. Unlike conventional systems, ST290 transducers are equipped with intelligent transducer pods that share information via SeaTalk2 with the entire ST290 system.