OSD-IMT

What OSD-IMT does

Longitude Engineering (OSD-IMT) is a marine and offshore engineering consultancy operating as part of ABL Group, a diversified energy and marine consulting conglomerate. The company delivers integrated engineering services across five interconnected pillars: Ship Design (newbuild and through-life support for offshore, research, small craft, and clean-shipping vessels), Conversion/Upgrade/Retrofit (feasibility studies through to fully engineered conversion packages and in-yard support), Facilities & Subsea (field development, brownfield modifications, asset integrity, life extension, decommissioning), Marine Operations (mobilisation, transportation, installation, moorings, metocean assessment, rigs), and Offshore Wind (WTG and substation foundations, submarine power cable engineering).

Its core technology rests on naval architecture, structural design and analysis, marine systems design, and hydrodynamics, supported by discipline-specific capabilities including stability analysis, manoeuvring analysis, computational fluid dynamics (CFD), loading computer design, structural engineering for vessel modifications, and alternative fuel / electrification engineering. The team carries over 30 years of combined ship design experience, and Longitude bundles marine assurance, risk, class, and flag expertise from sister company ABL into its vessel-conversion offering.

The business is a professional services firm. Revenue is generated through quote-based engineering consulting and design engagements — concept design, basic design, detailed engineering, and in-yard support — sold via direct enterprise field sales to vessel owners, operators, shipyards, offshore energy and subsea contractors, and research/scientific institutions. The primary customer segment is offshore vessel owners and operators (PSVs, anchor handling tugs, safety standby vessels) requiring conversion or modification. Pricing is not publicly disclosed; engagements are custom and project-scoped. The company maintains UK operations (Exeter and other UK locations) and a Brazilian operation established via the December 2025 absorption of Proper Marine.

Name

OSD-IMT

Legal name

Longitude

Website

https://osd-imt.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Longitude Engineering is a marine and offshore engineering consultancy within ABL Group, delivering ship design, vessel conversion/retrofit, marine operations, offshore wind, and subsea engineering services to enterprise clients across the maritime and offshore industries globally.

Ownership category

akta.pro rank

Product category

Marine and Offshore Engineering Services

NAICS

Ship Building and Repairing (336611)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Navigation, Communications & Integrated Bridge Systems Engineering (IMAJAGAH)

akta.pro secondary industry

Shipboard Electrical Distribution, Power Conversion & Automation (IMABAKAG)

Keywords

• Marine engineering services
• Ship design consultancy
• Offshore vessel conversion
• Naval architecture services
• Offshore wind engineering

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Engineering and Design Services: Professional services revenue generated through engineering consulting, design services, and technical analysis for vessel conversion, retrofit, and upgrade projects. Services include concept design, basic design, detailed engineering, and in-yard support.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

OSD-IMT (Longitude Engineering) is a marine and offshore engineering consultancy delivering integrated services across ship design, vessel conversion/retrofit, marine operations, facilities & subsea, and offshore wind. The firm combines naval architecture, structural design, hydrodynamics, and marine systems design with more than 30 years of ship design experience, supporting vessel owners, operators, shipyards, and offshore energy clients from feasibility studies through fully engineered conversion packages and in-yard support.

Product overview

Longitude Engineering (OSD-IMT) is a marine and offshore engineering consultancy offering integrated services across vessel design, conversion, and operations. The portfolio consists of five interconnected service areas: Ship Design (newbuild and retrofit vessel engineering), Facilities & Subsea (offshore infrastructure and asset lifecycle services), Marine Operations (installation and transportation engineering), Offshore Wind (foundations and cable systems), and Conversion/Upgrade/Retrofit (vessel modification services). The company leverages +30 years of ship design experience, naval architecture expertise, and structural/hydrodynamics analysis capabilities, supplemented by marine assurance and risk services through sister company ABL.

Differentiator

Problem solved

Functional benefit

Products and services

• Conversion, Upgrade & Retrofit Engineering services for vessel modifications, retrofits and conversions, including feasibility studies, fully engineered conversion design packages, and in-yard support. Covers stability analysis, manoeuvring analysis, loading computers, CFD, structural engineering, and alternative fuel/electrification engineering for vessel owners, operators, and shipyards.
• Facilities & Subsea Comprehensive subsea and offshore facilities engineering including field development, brownfield modifications, asset integrity and reliability, decarbonisation, life extension, and decommissioning services for offshore operators and energy clients.
• Ship Design Full-spectrum ship design services covering clean and sustainable shipping design, offshore vessels, research vessels, small craft, conversion and retrofit, and through-life support for newbuild and existing fleets.
• Marine Operations Marine operations engineering covering mobilisation engineering, marine transportation engineering, installation engineering, moorings/cables/umbilicals, metocean route and site assessment, and rigs engineering for offshore project execution.
• Offshore Wind Offshore wind engineering services covering wind turbine generator (WTG) foundation design, substation foundation design, and submarine power cable engineering for offshore wind developers and contractors.

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• ABL (Energy and Marine Consultants)coreStrategic or Co-development PartnerABL is Longitude's sister company providing energy and marine consulting services. Longitude's vessel conversion offering benefits from ABL's extensive knowledge in marine assurance and risk, marine operations, and class and flag requirements. This integrated approach enables comprehensive vessel conversion services.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• ABL Group: Parent company of Longitude, providing marine warranty, marine assurance, and risk consulting. Closely related rather than a direct competitor, but its service portfolio overlaps with adjacent offerings.
• Worley: Global energy and resources engineering firm with offshore and marine operations practices. Competes with Longitude in offshore engineering, subsea, and offshore wind foundation design.
• Wood Group: Global engineering and consulting major with significant offshore and marine operations. Overlaps with Longitude's facilities, subsea, and marine operations engineering offerings.
• Royal HaskoningDHV: Large international engineering consultancy with maritime practice covering ship design, ports, offshore, and maritime operations. Broader portfolio but directly competes in marine and offshore engineering services.

Direct peers

• Ulstein: Norwegian ship design and shipbuilding group known for offshore vessel design and innovative vessel concepts. Directly comparable in offshore vessel design and conversion engineering.
• BMT Group: Independent maritime engineering consultancy offering naval architecture, ship design, vessel conversion, and offshore engineering services. Highly comparable in offering and customer base to Longitude's Ship Design and Conversion/Upgrade/Retrofit practices.
• Glosten: US-based naval architecture and marine engineering consultancy serving offshore, government, and commercial marine markets. Direct peer in vessel design and offshore engineering services.
• Dykstra Naval Architects: Dutch independent naval architecture firm specializing in yacht, commercial, and offshore vessel design. Directly comparable in bespoke ship design and conversion engineering for high-end/complex vessels.
• Knud E. Hansen: Independent naval architecture firm specializing in commercial ship design, conversions, and customized vessel engineering. Comparable service model and target market.
• Vard (Fincantieri): Ship design and offshore vessel builder with strong Norwegian heritage and design offices supplying PSVs, AHTS, and specialized offshore vessels. Overlaps directly with Longitude's offshore vessel design and conversion work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/osdimt

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OSD-IMT