GlossaryEN1 min readUpdated: Jun 24, 2026

Hybrid Ship Propulsion Systems

Hybrid ship propulsion systems cut emissions without sacrificing the range and reliability that commercial shipping demands.

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Last updated: 24 June 2026Published: 19 June 2025

Source: https://www.imo.org/en/OurWork/Environment/Pages/GHG-Emissions.aspx

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Logistics concept

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1 min

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123

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Definition & Explanation

Hybrid ship propulsion systems cut emissions without sacrificing the range and reliability that commercial shipping demands. They combine at least two power sources—typically diesel engines and electric motors backed by battery storage—running either independently or in tandem depending on operating conditions. Electric drive takes over in port and during harbour approaches, where emission controls are strictest and low-speed efficiency counts most; diesel engines provide the sustained output needed on open-water passages. Shipping lines adopt these systems to meet the International Maritime Organization's (IMO) greenhouse gas reduction targets while keeping fuel costs in check. Because diesel remains available as the primary long-range power source, hybrid vessels are not constrained by shoreside charging infrastructure—a practical advantage that sets them apart from fully electric ship concepts.