Page 19: of Marine Technology Magazine (September 2022)

Applied Acoustics www.applied-acoustics.com

Family-run applied acoustics launched a new acoustic posi- tioning offering, its ? rst combined Inertial Navigation (INS) and Ultra Short Base Line (USBL) system. The Pyxis system is free of acoustic calibration and can operate without the need of external GPS or Gyro compass, aimed at reducing mobili- zation time and alignment errors.

The company reports that the engineering team have been working to improve the accuracy and performance of the en- tire Easytrak USBL product range. A new transceiver has been designed for the Alpha system, the 904C, which has increased 903C predecessor. The compact form not only allows for less the accuracy from 3.5% to 3% of slant range. The previous motion in free hanging applications which can improve the

Nexus Lite system has been replaced with the Nexus 2 Lite, accuracy, but it can be deployed by a single person and trans- using the 2686 transceiver (previously part of the Nexus 2 ported easily making the 904C ideal for small ROV or diver system), which has increased the accuracy from 1% to 0.45% tracking and mobilizing on smaller vessels of opportunity. of slant range. And ? nally, the Nexus 2 and Pyxis omni-di- The 904C power supply and receivers have been redesigned, rectional transceivers have been redesigned and now include reducing noise and improving the detection of target signals seven internal elements instead of the previous 5, further im- which improves the repeatability of position. A new, more ac- proving accuracy and all-round performance. curate compass allows for the compensation of motion to im-

The Alpha system now has an upgraded 904C transceiver prove the accuracy when using the 904C standalone without which has a rugged stainless housing and is smaller than the external sensors.

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ZZZURV\VFRP www.marinetechnologynews.com 19

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