Rate of Turn & AIS


Bluetooth Rate of Turn & AIS

The Raven Revolve is a rate of turn (ROT) sensor and automatic identification system (AIS) interface device for ship navigation. The Revolve integrates with a portable pilot unit via Bluetooth wireless or a USB cable.


  • Robust, reliable sensor based upon professional grade gyro technology.
  • Transmits ROT and AIS data via wireless data link with range up to 100 m (330 feet).
  • Automatically corrects wiring and baud rate errors on the AIS pilot plug.
  • Accurate ROT – complies with accuracy requirements of ship gyro standards.
  • Battery-powered (15+ hours) and completely isolated from ship’s power.
  • Portable – no installation required.
  • Self-monitoring and temperature compensated – no user calibration.
  • Loss Prevention – on-board audio alarm for wireless link loss helps pilots to remember to stow it before leaving a ship.

Physical Characteristics

  • Size: 114 mm x 79 mm x 24 mm (4.5 in x 3.1 in x 0.94 in)
  • Weight: 186 g (6.5 oz)
  • Operating Temperature: 4 to 40°C (40 to 104°F)
  • Storage Temperature: -20 to 50°C (-4 to 122 °F)
  • Connectors:
    • 7-pin eSATA, female
    • Mini-B USB
    • DC Jack


Rate of Turn Sensor

  • Accuracy complies with IMO Resolution A.526 (13) and ISO 20672:2007


  • Class I Bluetooth radio with dynamic power management
  • USB connector provides backup communications path


  • Li-Ion rechargeable battery
  • Operating time at 23°C (75°F): 15+ hours with Bluetooth connection
  • Battery recharge time: 3-4 h
  • LED indicators for low power and charge status


  • Auto-corrects for wiring errors on the pilot plug
  • Scans for PPI signals at 9600, 19200 and 38400 baud rates
  • Night mode dims the LED status lights at night
  • Soft shutdown after 60 minutes of no AIS data and no Bluetooth connection to conserve battery life
  • USB cable can be used for charging the battery and for hard-wire connection
  • Firmware can be updated in the field
  • Loopback adapter for verifying ship wiring issues

Download the Revolve rate of turn sensor information.