00000cam 2200000zi 4500 9.963282 CaOODSP 20261102114320 m o d f cr cn||||||||| 260603e20260309oncda ob f000 0 eng d 9780662354260 CaOODSP eng rda CaOODSP eng eng fre n-cn-bc T29-194/2026E-PDF Tugboat underwater radiated noise measurements / prepared by Robert Allan Ltd. Revision 3. Ottawa, Ontario : Transport Canada = Transports Canada, March 9, 2026. ©2026 1 online resource (1 volume (various pagings)) : charts, illustrations text txt rdacontent computer c rdamedia online resource cr rdacarrier Cover title. Prepared for: Innovation Centre of Transport Canada. "Project 225-034." "Document No. RAL02839R-225-034-500." Includes bibliographical references (page 60). "Robert Allan Ltd. (RAL) was retained by the Innovation Centre of Transport Canada (TC‑IC) to conduct a study to compare the underwater radiated noise (URN) from a modern battery‑electric (BE) harbour tug with that from diesel‑mechanical (DM) harbour tug with approximately equivalent size and performance. The two tugs used for the study are normally engaged in ship assist operations in the Port of Vancouver. The objective of the study was to characterize and compare URN emissions across representative operating conditions, identify dominant URN sources and transmission mechanisms, and evaluate the potential URN benefits of battery‑electric propulsion in environmentally sensitive waters"--Executive Summary, page vii. Includes summary in French. Tugboats British Columbia Vancouver Harbour. Underwater acoustics British Columbia Vancouver Harbour Measurement. Remorqueurs Colombie-Britannique Vancouver, Havre de. Acoustique sous-marine Colombie-Britannique Vancouver, Havre de Mesure. Canada. Transport Canada, issuing body. Robert Allan Ltd., consultant. PDF 15.40 MB https://publications.gc.ca/collections/collection_2026/tc/T29-194-2026-eng.pdf TP 15711E