AGI is pleased to introduce our second generation AGILOG Electromagnetic (EM) Speed Log System AGILOG 2 following on from the unprecedented success of its predecessor. Developed for use on surface warships and submarines, AGILOG 2 sets the standard for accurate and reliable measurement of ship’s speed through the water, an essential element in navigation and weapons system integration.

AGI's international reputation stems from over 40 years of experience in the design and manufacture of ship’s log systems for 45 navies worldwide. Covering all classes of vessels – from nuclear and conventional submarines, aircraft carriers and frigates, to fast patrol boats, mine-hunters and fleet support ships.

AGILOG 2 is based on the well-established electromagnetic principle that a voltage is induced in a conductor by a moving magnetic field. By using the sea water as a conductor, an output is generated as the vessel progresses. Electromagnetic speed measurement is passive in operation and therefore particularly suitable for use in submarines and warships. The EM technology provides reliable and robust speed availability when compared to some alternative technologies.

AGI’s products are highly customised items and are based on a modular design. The AGILOG 2 Speed and Distance Transmitter Unit (SDTU) provides a wide range of system interfaces and expansion options. AGILOG 2 provides single or dual axis speed measurement, with multiple RS422 serial outputs and Ethernet interfacing built in. AGILOG 2 also offers GPS assisted calibration which uses ground speed data to calculate the average true speed over a calibration run.

System Configuration: Typically, the AGILOG 2 system comprises of the SDTU, Underwater Sensor(s) (or Probes) and Multi-Function displays with potential for an optional Data Distribution Unit for full system expansion capability.

Key Features

  • GPS assisted calibration
  • Dual or quad calibration curves
  • Dual axis option for forward and athwart ship speed/distance
  • Ethernet interface
  • Dual sensor option
  • Underwater sensor selection
  • Low magnetic signature sensors (contact AGI for specific data)
  • Simulation more selection
  • Self-test capability (BITE)
  • Trip Meter
  • User friendly interface
  • Sensor replacement without dry docking


  • EMC – Mil-Std 461E
  • Shock – Mil-Std 901 grade A
  • Vibration – Mil-Std 167-1
  • Environmental – EN 60945
  • Power Supply – Mil-Std 1399 & EN 60945

The AGILOG2 System was selected by the RAN for the Air Warfare Destroyer Vessel. The legacy AGILOG1 Systems is employed on the ANZAC Class Frigates, and Collins Class Submarines.

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