Electromagnetic technology is considered a good low end solution for speed log requirements. With both 1 and 2 axis versions available the system, once installed, requires no calibration.
The EML 224 measures the speed of the vessel through the water (STW) at all times and in any depth. The measurement is made on the surface of the hull and has no minimum depth. The system includes
a single sensor mounted in a tank or Sea Valve. The display housing can be mounted anywhere on
the bridge and a connection box can be placed wherever it is most convenient for connection. A COM port within the connection box allows for easy installation and diagnostics from a laptop with
a RS-232 COM port.