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Engineering & Design

Solving Complex Problems

JMS Naval Architects is a specialty maritime engineering firm providing naval architecture, marine engineering, marine surveying, and marine casualty response services to assist ship owners in the management of their fleet. With a unique combination of high-end analytical engineering expertise and practical deck plate experience, JMS delivers innovative and cost-effective solutions to complex problems.

  • Naval Architecture

    JMS naval architects combine operational experience & technical expertise to provide a full range of naval architecture services for new vessel design or support for existing vessels:

    • Computer Aided Design & Engineering
    • Structural and Stability Analysis
    • Regulatory Evaluation
    • Trim & Stability Books
    • Computerized Loading Programs
    • Ship Inclinings
    • Repair Plan Specification
    • Finite Element Analysis
    • Modification Designs & Drawings
    • HECSALV & GHS Utilized
  • Research Vessel Design

    JMS acquired Roger Long Marine Architecture Inc. (RLMA). Founded in 1986, RLMA is considered the foremost designer of fast aluminum coastal oceanographic research vessels in the United States. The acquisition included exclusive rights to RLMA’s enormously successful CHALLENGER class fast research vessel designs. RLMA’s founder and principal designer, Roger Long, is senior design consultant to JMS’ research vessel design projects.

    JMS and Roger Long have collaborated on several projects in the past and have merged their resources to expand the CHALLENGER Class research vessel to new markets. Together with JMS’s extensive experience related to all aspects of research vessel design and research vessel operations, and having conducted over 150 surveys and inspections of research vessels located around the world, this technical knowledge-base supports Roger Long’s design expertise with practical and empirical engineering and performance data.

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  • Shipyard Work Support and Owner's Rep Services

    JMS offers shipyards and ship owners with full design capability or work package specifications. Our range of expertise is also used to provide launching / dry docking support, facility engineering support, and owner’s rep services for construction or repair projects. JMS provides deck plate engineering for repairs, modifications, equipment specifications, and new installation of shipboard systems.

  • Barges, Dry Docks, and Workboat

    JMS Naval Architects provides design and engineering services for complete vessel design package development; from concept design to detail, structure, and systems design, and complete shipyard bid package development.

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  • Off-Site Engineering Support

    JMS provides cost-effective off-site engineering support to vessel owners/operators to support their in-house engineering staff or provide turn-key engineering support. If you only have a part-time engineering need, we can help.

  • Marine Engineering

    JMS provides deck plate engineering for repairs, modifications, equipment specifications, and new installation of shipboard systems.

  • Expert Advice, Testimony, & Advanced Visuals

    JMS has performed accident investigation and damage analyses for cases involving submarine collisions, amphibious passenger vessel sinkings, hopper barge structural damage, containership structural failures, recreational boat accidents, diving accidents, vessel groundings, shipyard accidents, shipboard operational accidents and vessel design defects. Expert reports, depositions, and litigation support have been provided by JMS in many of these types of investigative or analysis projects.


CargoMaxTM is a shipboard loading calculation program which is used for planning and evaluating ship loading. It quickly and precisely calculates ship stability and stress characteristics based on any loading condition specified by the user. Over the past 18 years it has proven itself a valuable tool to maximize vessel utilization, increase cargo loading efficiency, increase crew productivity, monitor margins of safety during load/discharge, and improve safety (reduce human error). Numerous options are available to provide even greater utility for specific crew operations.