The LMN6 EM speed log is designed to withstand the severe environment of military naval vessels. It complies with major military and maritime standards.

It is upward compatible with previous LMN versions.

The log measures the speed over the water in the lengthwise and crosswise axis of the vessel using one or two electromagnetic sensors, calculates the partial and total distance travelled, and distributes navigation information – speeds, distances travelled, the status and alarms – on analog and digital interfaces (NMEA protocol on series RS422 bus and Ethernet IP link).