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Target Electromagnetic Speed Log


The Target electromagnetic speed log measures the boat speed through the water with no moving parts.

Robust and accurate, the sensor generates an alternating magnetic field below the boat and measures the resulting electric field produced by the boat moving through the water. It is designed for installation into most types of GRP hulls.

With excellent linearity and a resolution of 0.1 Knot, over the range 0.2 to 40 Knots, the log sensor sends signals to a control box which then converts the sensor signal to boat speed, trip and total distance. This data is transmitted in NMEA 0183 format to a new Target EM Log display unit.



The EML-2 electromagnetic transducer and controller can be supplied separately for connection to any NMEA 0183 display with the required VHW and VLW input.


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Target EM Log display

132 x 98mm compact size case with high contrast LCD

NMEA 0183 input

Speed in Knots

Trip and Total logs in nautical miles

Display backlighting


EM transducer and interface box

Speed range 0.2 – 40 Knots

NMEA 0183 output sentences VLW + VHW

Standard 50mm diameter transducer

Cable length 5.0 metres