Garmin GST-43 Speed/Temp Thru Hull TransducerThe Garmin GST 43 Speed Temp Thru Hull Transducer provides real time water speed and temperature data for precise navigation and performance tuning. Designed for thru hull installation, it sits flush in your hull to deliver dependable readings across a wide range of conditions. Through Hull Flush Mount Design: Sits flush in your hull for stable, reliable readings across a wide range of conditions. Real Time Speed & Temperature Readouts: Reads water