Ship speed log / digital / dual-axis
SAM 4642 Wärtsilä SAM Electronics


  • Application domain:

    for ships

  • Display:


  • Technology:



SAM 4642 is a navigation dual-axis electromagnetic speed log for measuring longitudinal and transverse speed through water. A mile counter is included. Speed information can be relayed to a radar, AIS, VDR and all other relevant devices via NMEA-format connections. Interfaces between the operator unit, electronic unit and sensor comply with IEC 61162 specifications. All relevant IMO requirements are met or exceeded.

The display is optimized for the intended purpose and consists of several numerical and alphanumerical LED segment displays
For audible warnings the operator unit is equipped with a buzzer
The communication between operator unit and sensor is established as a bi-directional exchange of proprietary and standard NMEA telegrams via the Com-NMEA interface.
Optionally, Windows software for calibration via a laptop is available
Operator unit power supply is 24 V DC
Sensor is connected to the electronic unit located within 40 m of the sensor
Connection from the sensor to the electronic unit is via a serial RS-422 data link as well as the connection from the electronic unit to the operator unit.
The link between electronic unit and operator unit may be up to 300 m
Transceiver power supply options are 230 V AC or 24 V DC


Other Wärtsilä SAM Electronics products