Summary of HF Sonar Sea-Trials on CCGS VECTOR, April 2015

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Authors
  1. Trevorrow, M.V.
  2. Vagle, S.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN);Institute of Ocean Sciences, Sidney BC (CAN)
Abstract
This report summarizes a HF sonar sea-trial conducted by a joint DRDCDFO team on the CCGS VECTOR April 8 to 14, 2015. The sea-trial was based out of the Institute of Ocean Sciences (IOS, Sidney BC) and took place in BC south coast waters. The primary focus was High-Frequency (HF) side-looking multibeam sonar tests against drifting and towed targets. The drifting targets were submerged air-filled steel spheres suspended at 1 and 4 m depth. Forward-looking sonar detection tests were conducted in seastates from 0 to 5. In low sea-states the targets were routinely observed at ranges up to 600 m, but the detection range was greatly reduced in higher sea-states. IOS operated near-surface bubble measurement devices to provide supporting data. The aft-looking sonar tests, designed to test target detectability in the ship wake, were conducted with a new DRDC towed acoustic target. The target was towed at 20 to 500 m behind the ship at speeds from 6 to 7.5 knots. Generally the target was visible at all ranges except in the close vicinity (< 50 m) of the stern. Additional towing tests of a new DRDC HF Towed Array were successfully conducted.

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Keywords
multibeam sonar;HF multibeam sonar;bubbles;ship wakes;towed acoustic array
Report Number
DRDC-RDDC-2015-R245 — Scientific Report
Date of publication
01 Nov 2015
Number of Pages
60
DSTKIM No
CA041564
CANDIS No
802761
Format(s):
Electronic Document(PDF)

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