Build a transom-mounted sonar setup for coastal and offshore fishing with the Garmin GT23M-TM. Mid-band CHIRP traditional sonar operates at 80–160 kHz, alongside 260 and 455 kHz CHIRP ClearVü scanning. An 8-pin connection and 30-foot cable carry depth and temperature data to compatible equipment.
Traditional and scanning sonar, separately specified
The traditional sonar element is rated at 600 W and the ClearVü element at 500 W. The supplied transom mount supports installation on a transom angle from 0 to 70 degrees. Confirm sounder compatibility and follow the included installation instructions carefully to avoid damaging your boat.
Specifications
Connection
8-pin
Sensor data
Depth and temperature
Traditional sonar
Mid-band CHIRP, 80–160 kHz
ClearVü CHIRP
260 kHz (245–275 kHz) and 455 kHz (445–465 kHz)
Stated traditional power
600 W
Stated ClearVü power
500 W
Traditional beamwidth
24–13 degrees
Manufacturer-stated maximum depth
Traditional: 1,800 ft; ClearVü: 1,000 ft
Cable length
30 ft
Supported transom angles
0–70 degrees
Part number
010-12404-00
The stated maximum depths are manufacturer specifications; actual performance depends on the installation and water conditions.
