A worker stands near the NH3 Kraken, a tugboat powered by ammonia, on Friday, Sept. 13, 2024, in Kingston, New York. It set sail for the first time on Sunday Sept. 22, 2024.

Another issue is the fuel tank, which would need to be much larger for any standard tugboat making long oceanic journeys. Support tugs however, are built for ocean travel and can handle offshore work.

The tugboat radar, specially designed by the Sperry Gyroscope Co. for close-range work, shows objects 80 yards away, large objects even closer. It can “see” for 30 miles, but tugboats are ...

According to an update from Arc Boats, it is retrofitting a 26-foot tugboat with electric motors and massive lithium-ion battery packs to serve the Port of Los Angeles.