The SKIPPER EML 224 is a dual axis speed log, working on the electromagnetic principle, providing longitudinal and transversal shipspeed relative to sea water. The EML 224 gives accurate navigation parameters, measured as they happen, and presented in a logical, user friendly way. Electromagnetic technology is considered a good low end solution for speed log requirements. The dual axis system requires no calibration, once installed. The EML 224 measures the speed of the vessel through the water 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 sensor mounted in a tank or Sea Valve.