The µPAP is a portable system designed for tracking ROV’s, tow fish, divers and other subsea objects.


  • Subsea
  • Surface
  • Offshore
  • Hydroacoustics (HIPAP)
  • Transponder
  • Echo sounder
  • Acoustic telemetry
  • Hydroacoustic positioning

General features

µPAP is a small and compact acoustic positioning system designed for operation from a surface vessel to track ROV’s, tow fish, divers and any other subsea object at several thousand metres range. The system operates in SSBL mode where it measures the distance and direction to subsea transponders and computes a 3D position in local coordinates or in geographical coordinates.

Versatile Positioning Capabilities

µPAP benefits from the Cymbal acoustic protocol and all functions that are available for the HiPAP products are also available for µPAP. µPAP has full LBL calibration and positioning capabilities and can be used for position box in, calibration and positioning. The system is offering the user a wide range of transponder channels and cNODE transponder models for depths down to 4000 metres. µPAP has built-in motion sensors for compensating the position for vessels' roll and pitch movements.

Ease of Use With Robust Output

These models have no need for calibration of roll and pitch alignments but need to calibrate for alignment to the vessels’ gyro compass. The system can be interfaced to the vessel heading sensor and GNSS system. Data output to users are available in established formats. The µPAP 201-MGC contains a motion sensor and a gyro compass. This model has no need for calibration to determine roll, pitch and heading alignments. To meet various demands from the market, µPAP transducer is available in several models with respect to motion sensors and physical size.

Key features

  • Online Help on screen
  • APOS operation advantages
  • Automatic electronic beam steering
  • Optional full LBL functionality Software
  • Latest technology for your future applications
  • Reliable through well proven HiPAP technology
  • More accurate than HPR 410P / 418P systems
  • Positions hundreds of underwater transponders and responders
  • Outputs position data to navigation systems in established formats
  • 6 transducer models inclusive Non Export License require versions
  • µPAP Operator station processes inputs from Heading Sensor, GNSS and Sound Velocity Probe
  • Narrow pointing receiver beams, suppressing noise from other directions
  • The new optional Cymbal acoustic protocol introduces a number of improvements
  • Prepared for easy over-the-side mounting on vessel of opportunity – no gate valve
  • Cymbal acoustic protocol using Direct Sequence Spread Spectrum (DSSS) signals
  • High speed acoustic data communication using wide-band spread spectrum signals

Products range

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