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The Mariner’s Compass

Pyxis USBL takes the best of AAE’s subsea acoustic tracking technology with a highly advanced inertial navigation system (INS) from one of the most respected names in the industry, to create a state of the art, inertially aided Ultra Short Baseline system capable of accurate subsea tracking with survey grade performance.

Applied Acoustics for Nav and Positioning.

For over 20 years, ROMOR clients have always been impressed with the design and engineering of products by Applied Acoustics.

USBL System Selection Guide

Key Features

  • All operational equipment, hardware and software
  • Integral pitch, roll and heading sensors to compensate for vessel movement
  • GPS receiving software
  • Robust, lightweight enclosures
  • Intuitive control software, bringing the confidence of professional USBL systems to a wide operator base


  • Track multiple targets simultaneously
  • Track horizontally, enabling the location of floating targets e.g. AUV retrieval
  • Operate in diverse applications with universal appeal
  • Offer a versatility in system configuration that is second to none
  • Operate AAE Acoustic Release Beacons (Pyxis, Nexus 2 and Lite

Positioning Beacon on ROV

Key Features

  • Positioning Beacon on ROV
  • Robust, rugged construction
  • Easy selection of transmit and receive frequencies (channels)
  • High reputation for signal stability
  • Rigorously tested for distinguished endurance and performance

Standard Products

  • Micro Beacons: Small sized, ideal for divers, short ranges and small ROV’s
  • Mini Beacons: ‘Work-horse’ beacons for towfish and ROV tracking, often used by divers too
  • Midi Beacons: High powered, but compact. Used for long range towfish tracking and AUV positioning
  • Fatboy Beacons: Ideal for deep water ROV’s and AUV’s
  • Low Frequency Beacons: Long range, deep water applications
  • Seabed Beacons: Large battery capacity for long term deployment often used as reference markers
  • Release BeaconsApplications

    Acoustic Release beacons are used to recover or lower equipment deployed under the sea, either in shallow or continental shelf waters. The beacon holds on to the anchor weight attached to the instrument or equipment until remotely commanded to release it.

    Acoustic releases can be used as recoverable reference markers for positioning systems such as Easytrak and other USBL systems, as well as allowing the recovery of subsea instruments such as current meters.