Dear SNAME Canadian Pacific Section members and friends,
The Society of Naval Architects and Marine Engineers (SNAME) Canadian Pacific Section is proud to announce our first technical meeting for the 2025-2026 season!
Sign-up link below:
Quantitative Mitigation of URN in Harbor Tug Design and Operation - IN-PERSON EVENT
🚢Quantitative Mitigation of URN in Harbor Tug Design and Operation - IN-PERSON EVENT
🗓️ When: Thursday, October 16, 2025 from 05:00 PM to 09:30 PM (PT)
🌐 Hosted by: SNAME Canadian Pacific Section
PRESENTATION ABSTRACT
Harbour and escort tugs contribute to the URN emissions in and around ports, both in British Columbia and globally. Robert Allan Ltd. conducted an extensive URN measurement program onboard diesel-mechanical and battery-electric azimuthing stern drive (ASD) modern escort and harbour tugs. The underwater noise and onboard vibration measurements were integrated into an in-house URN prediction model developed specifically for tugs, named TugEm (short for Tug Emissions), to support URN predictions. Computational fluid dynamics (CFD), finite element analysis (FEA) and statistical energy analysis (SEA) were leveraged to enable URN prediction in TugEM, supporting quiet tug design and noise reduction efforts.
AGENDA
5:30-7:15 PM (PT): Social Event and Networking at Good Co. Granville
Address: 965 Granville St, Vancouver, BC V6Z 1L3
7:15-7:30 PM (PT): Move to Presentation location at UBC Robson Square Campus, Room C225 Address: 800 Robson St, Vancouver, BC V6Z 2E7
7:30 PM (PT): Technical Presentation
LOCATIONS
• Good Co. Granville 965 Granville St, Vancouver, BC V6Z 1L3
• UBC Robson Square Campus, Room C225, 800 Robson St, Vancouver, BC V6Z 2E7
SPEAKER/PRESENTER
Waltfred Lee, MASc, EIT - Mechanical Engineer/Machinery Noise & Vibration Analyst - Robert Allan Ltd.
Waltfred Lee is a mechanical engineer at Robert Allan Ltd., specializing in fluid dynamics and noise & vibration. With a background in tech and engineering, he focuses on scalable solutions for the maritime sector and environmental challenges, bridging technology with environmental responsibility. Waltfred holds a MASc in Mechanical Engineering from the University of Victoria, Canada and BASc in Mechanical Engineering from Nagoya University, Japan.
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Vincent Liu
Seaspan Vancouver Shipyards
Canada
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