Easytrak is an Ultra Short Baseline (USBL) underwater positioning and tracking system centred on a multi-element single transducer that transmits and receives acoustic signals to and from a beacon attached to a dynamic subsea target from which range, bearing and depth information can be determined.
The Easytrak M-USBL has been developed to operate in the military environment as an OEM supply for integration into client systems.
Accuracy is based on the correct speed of sound being entered, no ray bending and an acceptable S/N ratio
Slant Range accuracy
0.2m (accuracy dependent on correct speed of sound)
0.6° drms 1.0% of slant range
(acoustic accuracy excluding heading errors)
Frequency Band (MF)
Reception 24 – 30 kHz
Transmission 17 – 26 kHz
Transmitter power > 187dB ref. 1µPa at 1m
Tracking Beam Pattern
Transponders and responders
Internally set or external key
90 to 240VAC 50A
DEF STAN 00-35 Part 3: Issue 4 including temperature shock test.CL14
Operation in water
-4˚C to +32˚C
Operation in air
-20˚C to +44˚C
-40˚C to +70˚C
High ambient temperature operation in air is for short duration system checks only, thermal protection is fitted and unit will auto shut down.
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)
5 to 33
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)
DEF STAN 59-41 Part 3* *subject to power supply
Acoustic sensor housing is Aluminum Silicon Bronze (NES 834) with a typical relative magnetic permeability of 1.05.