OSD-IMT
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.
- Company typePrivate
- Founded-
- Headquarters—
- Headcount11–50
- GTM typeB2B
- OfferingServices
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.
OSD-IMT firmographics
Firmographics- 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
OSD-IMT industry classification
Industry- 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
OSD-IMT business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales
Revenue model
- 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
OSD-IMT product offering
Product offeringCore 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.
Companies that use OSD-IMT
Customer profileSegments3 records
Ideal customer profiles4 records
OSD-IMT technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
OSD-IMT partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- ABL (Energy and Marine Consultants)coreABL 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
OSD-IMT competitors and assessment
Company assessmentBroad 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
OSD-IMT social profiles
Digital presenceOSD-IMT financial estimates
Financial estimateRevenue estimate
Valuation estimate
OSD-IMT leadership team
Management profileNumber of profiles
OSD-IMT subsidiaries and ownership
Company hierarchySubsidiaries1 record
OSD-IMT funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
OSD-IMT M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about OSD-IMT
What does OSD-IMT do?
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.
Is OSD-IMT a public or private company?
OSD-IMT is a private company. It is classified as corporate owned and is currently operating.
When was OSD-IMT founded?
OSD-IMT was founded in -1. It employs 11 to 50 people.
How does OSD-IMT make money?
One revenue line is on record: engineering and Design Services.
Who are OSD-IMT's main competitors?
Broad incumbents on record are ABL Group, Worley, Wood Group and Royal HaskoningDHV. Direct peers are Ulstein, BMT Group, Glosten, Dykstra Naval Architects, Knud E. Hansen and Vard (Fincantieri).
Does OSD-IMT have an API?
No public API is recorded for OSD-IMT.
What industry is OSD-IMT in?
OSD-IMT's product category is Marine and Offshore Engineering Services. Its primary akta.pro industry code is IMAJAGAH, Navigation, Communications & Integrated Bridge Systems Engineering, with a secondary code of IMABAKAG, Shipboard Electrical Distribution, Power Conversion & Automation. Its NAICS code is 336611 and its SIC code is 3730.