Arc Commences Battery-Electric Conversion of Long Beach Harbor Tug with Port Funding
Arc, a marine technology company, has initiated the engineering phase for converting the 'Harbor Sentinel,' a 50-foot harbor tug owned by Pacific Maritime Group (PMG), to battery-electric power. This project is supported by funding from the Port of Long Beach's Technology Advancement Program (TAP) and SWIFT Program, along with a Volkswagen Environmental Mitigation Trust grant. The conversion involves replacing the tug's twin diesel engines with an Arc electric powertrain, which will include a 2 MWh battery bank, electric motors, and a DC fast-charge inlet. Naval architecture firm Glosten is leading the vessel engineering, adapting the tug to meet U.S. Coast Guard Subchapter M requirements. PMG will undertake the physical modifications, including widening the vessel and constructing a new deck and pilothouse. Following commissioning, the 'Harbor Sentinel' will undergo a 12-month demonstration period from PMG’s Long Beach terminal, during which Arc will collect performance data and report to the Port.