However, it’s not only people who suffer from diesel ships. When in operation, their engines produce low-frequency vibrations that radiate under water, often for miles and miles. Over the long term, this negatively impacts fish and marine wildlife that rely on echolocation to find partners, prey or enemies. In a worst case scenario, entire shoals of fish leave their natural habitat.
This is a dilemma especially for research ships and ferries. Research ships want to produce good results and findings, but without burdening natural resources or marine habitats. Ferries, on the other hand, are operated along particularly picturesque or fast routes that touch on or cross human and marine habitats. Emissions and noise are detrimental in all of these situations, but these are also the ones where a hybrid drive’s electric mode can play out its advantages.