Propulsion Retrofits & Engine Repowering Services

Future-Ready Engineering

As global shipping advances toward decarbonization, fleet operators face pressure to reduce CO₂ emissions, improve fuel efficiency, comply with evolving environmental regulations, and assess the impact and cost-effectiveness of Energy-Saving Devices. Herbert Engineering Corp. (HEC) supports this transition through advanced repowering and retrofit design services, with a proven track record in LNG propulsion conversions, dual-fuel integration, and engine replacement programs.

OUR RETROFIT SERVICES INCLUDE:

    • Dual-fuel LNG retrofit feasibility & design

    • Main & auxiliary engine replacements

    • Structural integration & HVAC rerouting

    • LNG fuel handling systems

    • Class & Flag state interface (ABS, DNV, USCG, etc.)

    • Piping, electrical, and automation systems redesign

    • 3D scanning and modeling for legacy vessels

    • Stability assessment and documentation

    • Shipyard specification and production support

    • On-site technical support and commissioning

WHY CHOOSE HEC:

    • 60+ years of ship design and marine systems integration
    • Proven engineering leadership in LNG and dual-fuel repower projects
    • Expertise in containerships, bulk carriers, tankers, and specialty vessels
    • Risk-informed decision-making (HAZID, HAZOP, lifecycle cost planning)
    • Trusted by major operators including Matson, Keystone, Fairwater, and Patriot

OUR MULTI-
DISCIPLINARY TEAMS

HEC brings deep expertise in structural design, mechanical integration, electrical systems, control automation, and regulatory compliance—ensuring your vessel’s propulsion upgrade is technically sound and operationally seamless.

Featured Project

MKI LNG Repower Design

HEC supported Matson Navigation Company in converting the MANUKAI containership to dual-fuel propulsion using LNG to significantly lower CO₂ emissions.

Matson MANUKAI Conversion:

  • Project Scope:

      • Replaced the main engine and two auxiliary generator engines with new dual-fuel units

      • Integrated LNG storage and fuel handling systems

      • Full systems design, including:

        • Piping

        • HVAC

        • Electrical systems

        • Structural modifications and reinforcements

    • Integrated with existing control and automation systems

    • Managed Class and USCG approvals

    • Delivered the shipyard specification

    • Participated in:

      • HAZID & HAZOP risk analyses

      • Incline test and updated stability documentation

      • LNG gas trials and final commissioning

LET’S TALK REPOWERING

Whether you’re evaluating a single vessel or preparing a fleet-wide emissions strategy, HEC brings clarity, capability, and confidence to your next upgrade.