The hybrid option is the best solution for harbor tugboats, due to its high variable duty cycle, also known as the tugboat dilemma.

Conventional diesel direct driven tugboats are designed for the deliverance of 100% power, required only 2% of their lifecycle. The hybrid Rotor®Tug was designed to generate maximum fuel efficiency across the entire load range. Energy can now be stored for standing-by or very low power operations. This enables the tugboat to operate in a noiseless zero emissions mode.