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Applied Acoustics Nexus 2 USBL, 2686 Transceiver

Omni-directional

This is a high performance USBL system. It is the next generation of advanced USBL positioning and tracking system that incorporates Sigma 2 spread spectrum technology to provide a secure acoustic link. By incorporating AAE Sigma 2 technology the wide bandwidth transmissions reduce its susceptibility to interference and enables precise, reliable positioning over an extended operational range.

  • Applied Acoustics Nexus 2 USBL, 2686 Transceiver
Applied Acoustics
Gapton Hall Road
NR31 ONB Great Yarmouth
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Description

The Nexus 2 is the second generation of Easytrak digital USBL systems designed as a highly advanced positioning and tracking system that is quick to deploy and straightforward to operate.  Featuring Applied Acoustics' Sigma 2 acoustic protocols, the Nexus 2’s digital spread spectrum transmissions provide a secure acoustic link with very low susceptibility to interference, enabling precise and reliable positioning over an extended operational range.

Able to determine the positions of up to 16 dynamic subsea targets simultaneously, Nexus 2 is ideal for many deep or shallow water applications where multiple assets are to be tracked. These operations can include UXO surveys utilising several magnetometers or sidescan sonars, diving operations, and for use at offshore worksites where several vehicles may be in use concurrently. The long range capability and exceptional accuracy specifications make Nexus 2 particularly effective for long layback towed applications.

When coupled with 1100 Series positioning beacons, Nexus 2 provides Multi-Fire and MiQ Data uplink functionality.   

Specifications

  • Date of first release
    2016
  • Mounting
    Hull mounted & Portable
  • Retractable
    Y
  • Diameter [mm]
    152
  • Height [m]
    0.432
  • Min. external power [Voltage]
    90
  • Max. external power [Voltage]
    240
  • Max power consumption [W]
    250
  • Type of system
    USBL
  • Frequency {kHz}
    18-32
  • Spread spectrum technology
    Y
  • Min. operation range {m}
    1
  • Max. operation range {m}
    2000
  • Operation beam angle {deg}
    180
  • Angle accuracy (degr) @ 20 dB
    0.25
  • Focussed beam forming
    N
  • Number of active elements
    6
  • Number of transponder channels
    16
  • Multi user functionality
    Y
  • LBL-functionality
    N
  • Horizontal accuracy (in % of the water depth)
    0.45
  • Vertical accuracy (in % of the water depth)
    0.45
  • Ray tracing
    N
  • Real-time integration of SV-profile
    Y
  • Motion sensors compatible to the system:
    Internal AHRS + external options. Internal depth sensor
  • Compatible hardware
    Serial and Ethernet
  • Compatible software
    Nexus 2
  • Real-time access procedure
    Embedded Windows 7
  • Inertial interfacing
    Y
  • Dimensions {mm}
    74 x 395
  • Dry weight {kg}
    3
  • Depth rating {m}
    1500
  • Additional functions
    Remote transponder option. Depth sensors. Modem. Omni-directional transponder type 1119 specification quoted. Directional transponders also available.
  • Inside deployment pole available
    Y
  • Diam gate valve {mm}
    300
  • Outside deployment pole available
    Y
  • Recommended distance below keel {m}
    2.5
  • Distinguishable features
    High accuracy/repeatability. Bi-directional Sigma 2 spread spectrum. Integrated 'Easycal 2', USBL calibration tool. Graphical overlay. Spec describes directional Transceiver Type 2686.. Directional transceiver option also available..

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