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Wednesday, May 20, 2026

Sea Trials News

19 May 2026

Hyliion USX-1 Defiant USV Chosen as Launch Platform for KARNO Core Sea Trials

Credit: Hyliion Holdings

Hyliion Holdings Corp., a developer of modular power plant technology, announced that the U.S. Navy’s Office of Naval Research (ONR), in partnership with the Defense Advanced Research Projects Agency (DARPA), has selected the USX-1 Defiant as a candidate test vessel for Hyliion’s KARNO technology. Initial sea trials are funded under a development program from the Office of Naval Research (ONR) to advance the use of KARNO Cores for onboard power generation in U.S. Navy vessels.For the USX-1 Defiant sea trials


08 Apr 2026

Sanmar Shipyards Celebrates Successful Sea Trials of 14th All-Electric Tug

Sanmar Shipyards has announced the successful completion of sea trials for its 14th fully electric tugboat, marking an achievement in the company’s 50th-anniversary year. This latest vessel, an ElectRA 2500SX design, reinforces Sanmar’s position as a global leader in the transition toward a sustainable, emissions-free towage industry.The ElectRA Series was created through an exclusive partnership with Canadian naval architects Robert Allan Ltd. This collaboration introduces a new way of managing harbor operations by focusing on sustainable technology and modern design.

04 Feb 2026

HII Newport News Shipbuilding Completes Builder’s Sea Trials of John F. Kennedy (CVN 79)

© HII

HII announced that its Newport News Shipbuilding (NNS) division has successfully completed builder’s sea trials of John F. Kennedy (CVN 79), the second Gerald R. Ford-class nuclear-powered aircraft carrier.Kennedy returned to NNS after testing important ship systems and components at sea for the first time.The sea trials brought together NNS shipbuilders, John F. Kennedy sailors and Navy personnel to execute the testing and demonstrate ship operations.CVN 79 continues the legacy of highly capable nuclear-powered aircraft carrier platforms.

26 Aug 2025

WSF Ferry Wenatchee Suffers Electrical Issue

Washington State Ferries WENATCHEE dockside at Vigor Shipyard.
Image courtesy WSDOT

Sea trials on the Washington State Ferries (WSF) ferry Wenatchee (2,500 passengers, 200 vehicles) got off to a bad start last week, as WSF reports "investigation by our technicians and engine crew discovered last week the control system communication wires were creating intermittent instability which caused the drive motors to go offline."Invariably, problems crop up during most every vessel's shakedown, and WSF said "While unexpected, issues like this are a normal part of a vessel commissioning which involves rigorous inspection


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