Easytrak Nexus 2 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.
The MIL grade Easytrak Nexus 2 determines the position of dynamic subsea targets by transmitting and receiving acoustic signals between submerged transceivers and target beacons. Positions can be geographically referenced with chart overlays and internally logged for a complete solution.
Transceiver, Type EZT-2686 And EZT-2780 Specifications
Factory calibrated multi-element transceiver head complete with integral AHRS, depth sensor and temperature sensor.
Weight in air/water
2686 16kg/11kg 2780 21kg/15kg
2686 152mm Ø x 432mm 2780 200mm Ø x 432mm
Operating: -10° to +40°C Storage: -20° to +50°C
Depth sensor (Pressure Sensor)
5 bar, accuracy 0.25% between -10° to +40° C
1° resolution between -10° and +40° C
Frequency band (MF)
18 – 32 kHz
Tracking beam pattern
2686: 180° 2780: 150°
Variable, typical max 192dB re 1µPa at 1m
AAE Sigma 1, Sigma 2 Digital Spread Spectrum and AAE Tone
channels. AAE V-NAV channels. HPR 400 channels
1100, 1000, 1200A, 1300A Series Beacons, Digital Depth
Transponders, AAE Release and Telemetry Beacons.
>2Hz refresh rate. Internally set or external key
Externally assessed for immunity and emissions; conforms to 89/336/EEC. RoHS compliant
Accuracy is based on the correct speed of sound being entered, no ray bending and an acceptable S/N ratio
Position repeatability, calibrated and measured with SNR > 20dB rel.1µPa in a controlled test environment
Transceiver Cable, Code: EZT-MC-50
Code: EZT-MC-50 is under U.K. Export Control ML9a1
12.8 mm nominal
50 metre standard length
20 kg. Allows transducer to be deployed from cable
Electro Magnetic Immunity (EMI)
MIL STD 461D tests: CE101, CE102, RE101, RE102, CS101, CS114, RS101, RS103 to an upper limit of 1GHz.
High Temp Test (MIL-STD-810F. METHOD 501.4)
Low Temp Test (MIL-STD-810F. METHOD 502.4)
Humidity Test (MIL-STD-810F. METHOD 507.4)
Vibration DEF STAN 00-35 Part 3: Issue 4 M1: General Purpose Vibration Test: Deployed or installed in surface ships: Sine sweep M1: General Purpose Vibration Test: Deployed or installed in surface ships: Sine dwell
Amplitude (mm pk)
Upper deck, Protected Compartment
5 to 33
1.250 0.300 0.125
14 23 33
20 20 20
Shock DEF STAN 00-35 Part 3: Issue 4 M7: Shock Testing for Warship Equipment & Armament Stores: Classical Shock Pulse NCUE – Classical Shock Pulse
1 shock in each direction of each orientation (6 in total)
See operational specification for testing methodology.