Maritime Tamsen

What Maritime Tamsen does

TAMSEN MARITIM GmbH is a privately held German shipyard located in Rostock-Gehlsdorf on the Baltic Sea coast, operating across three integrated business lines: newbuild of special-purpose vessels (SAR boats, naval support craft, customs patrol vessels, and yachts), ship repair and modernisation (naval, authority, commercial, and superyacht segments), and large-scale composite manufacturing. The yard was originally established in 1995 as A&R Neptun Boat Service GmbH and has since completed over 1,000 repairs and modernisations, delivering twelve rescue boats to DGzRS and securing its first Bundeswehr newbuilding order in 2023. The company's most distinctive technical asset is Europe's largest 5-axis CNC milling centre (70m × 13m × 7m), capable of sub-0.5mm deviation over 70m, which it leverages for wind-energy composite plugs, moulds, and large marine structures for customers including HanseYachts and Danish wind turbine manufacturers.

The yard spans 70,000 sqm with 24,000 sqm of covered facilities, eight workshops (28-81m length), five accommodation berths up to 90m, a 1,500t ship lift (65m × 20m), and a 350m pier with 7-10m water depth. Approximately 130 employees work at the site, including 30 engineers and 18 apprentices, supported by an in-house design and project management team that delivers tailor-made vessels from concept through lifecycle support. Defence-grade certifications — DIN EN ISO 9001, DNV FRP approval, DIN 2303 military welding certification, and DIN 9606-1 welder qualifications for non-magnetic steel — underpin its qualification for German federal, naval, customs, and rescue-service procurement.

Revenue is generated through project-specific, quote-based contracts across three streams: ship repair and refit (~50 dockings annually), newbuild special-purpose vessels (record five ships under simultaneous construction in 2022), and composite/CNC milling services for external clients in the wind-energy and yacht sectors. Go-to-market is direct enterprise and government sales through named account managers and the Managing Director, supplemented by trade-show presence at SMM Hamburg, COMPOSITES EUROPE, and METS Amsterdam, plus hosted networking events such as "Business meets Hanse Sail." Pricing is not publicly disclosed; revenue figures are not available, though the company states 700% turnover growth from 2009 to 2024. The company is investing in digital twin/Industry 4.0 production workflows and SkamodSys modular propulsion R&D with Fraunhofer IGP and the University of Rostock to position for climate-friendly shipbuilding demand.

Name

Maritime Tamsen

Legal name

TAMSEN MARITIM GmbH

Website

https://tamsen-maritim.de

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

51–100 employees

Short description

TAMSEN MARITIM is a privately held German shipyard in Rostock providing newbuild, repair, and large-scale composite manufacturing for government (DGzRS, Bundeswehr, Customs), commercial, and superyacht clients, anchored by Europe's largest 5-axis CNC milling centre.

Ownership category

akta.pro rank

Product category

Shipbuilding and Marine Engineering Services

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (3366)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Naval & Government Vessel Maintenance & Modernization (TLAKAKAB)

akta.pro secondary industries

Hull, Structure & Steelwork Repair (TLAKAKAE), Full-Custom Superyacht & Megayacht Manufacturing (IMAJAMAB), Landing Craft & Amphibious Workboats (LCM/LCT-style, Beaching Craft) (IMAJADAK)

Keywords

• Shipbuilding services
• Ship repair maintenance
• Vessel modernization refit
• Composite component manufacturing
• Naval vessel construction

Headquarters

HQ city

Rostock

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Ship Repair and Refit: Core revenue stream covering repair, modernisation, and conversion of naval vessels, authority boats, commercial ships, and superyachts. Approximately 50 dockings per year; over 52 vessels docked in 2021 despite Covid.
2. Newbuild Vessels: New construction of special-purpose vessels including SAR boats for DGzRS, STS workboats for German Navy, customs patrol boats, and custom-designed vessels. Five ships under construction simultaneously as of 2022.
3. Composite Components Manufacturing: Production of large composite structures including master plugs for wind turbine blades, moulds, and yacht components using Europe's largest 5-axis CNC milling centre. Major orders from wind turbine manufacturers including Danish producers.
4. CNC Milling Services: Precision machining services for external clients including wind energy industry plug production and milling for prestigious German sailing yacht manufacturers like HanseYachts.

Go-to-market motion3 records

Distribution channels2 records

Marketing channels6 records

Core offering

Maritime Tamsen (TAMSEN MARITIM GmbH) is a German shipyard providing integrated shipbuilding, modernisation, and repair services for naval vessels, search-and-rescue craft, commercial ships, and superyachts up to 70m in length and 1,500 tonnes. The company also operates Europe's largest 5-axis CNC milling centre for the precision manufacture of large composite structures, plugs, and moulds, serving the wind energy and marine sectors from a single 70,000 sqm Baltic Sea facility in Rostock.

Product overview

TAMSEN MARITIM is a German shipyard offering an integrated portfolio of shipbuilding, ship repair, and composite technology services. The company operates three main divisions: Newbuild (covering SAR/authority vessels, naval vessels, and luxury yachts), Repair (including naval vessels, authority vessels, commercial ships, and modernization/conversion projects), and Composite Technology (featuring Europe's largest 5-axis CNC milling center for producing large composite structures, plugs, and moulds for wind energy and marine applications). The company also provides in-house design and project management services to deliver complete lifecycle support for vessels up to 70 meters in length.

Differentiator

Problem solved

Functional benefit

Products and services

• Newbuild - SAR and Authority Vessels Construction of Search and Rescue (SAR) vessels and authority/government vessels for organisations such as the German Maritime Search and Rescue Service (DGzRS) and customs authorities, including rescue boats in 9.5/10.1m and 27.5m classes.
• Newbuild - Naval Vessels Construction of naval vessels including STS (Securing, Transport, Towing) workboats for the German Navy/Bundeswehr (20m, 744 class), plus minesweeper and other naval newbuild programmes.
• Newbuild - Yachts Construction and refit of luxury yachts and superyachts, including motor yachts, leveraging in-house design and the shipyard's composite manufacturing capabilities.
• Repair - Naval Vessels Repair and maintenance services for naval vessels including mine hunters, fast patrol boats, and Nordstrand-class tugs, using the Rostock ship lift (65m x 20m, 1,500t) and pier facilities.
• Repair - Authority Vessels Repair services for authority and government vessels including rescue cruisers, customs boats, coast guard vessels, and fire-fighting boats, with rapid turnaround and on-site parts storage.
• Repair - Commercial Ships Repair services for commercial vessels including passenger ships, ferries, research vessels, and workboats, leveraging the yard's ship lift, pier, and workshop infrastructure for vessels up to 70m.
• Modernisation & Conversion Comprehensive modernisation and conversion projects including propulsion system upgrades (e.g., remotorisation with MTU engines), automation systems, structural modifications, and full vessel conversions such as rescue-to-fire-fighting boat conversions.
• 5-Axis CNC Milling Services Precision CNC milling services using Europe's largest 5-axis CNC milling centre (70m x 13m x 7m), capable of less than 0.5mm deviation over 70m length, for wind energy manufacturers, marine components, and large composite workpieces.
• Plugs and Moulds Production of master plugs and moulds for composite manufacturing, including components for wind turbine blades up to 75 metres in length, supplied to wind turbine manufacturers and sailing-yacht builders such as HanseYachts.
• Large Composite Structures Manufacturing of large composite components using fibre-reinforced plastics (FRP) manufactured under DNV Approval of Manufacturer for marine and wind energy applications.
• In-House Design and Project Management Comprehensive in-house design and project management service developing tailor-made vessels from initial concept through to complete system delivery, supported by dedicated project teams assigned per customer for direct control of design and construction.

Quantifiable outcome

• 700% turnover growth from 2009 to 2024
• +4 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Hanse Sail Association RostockcoreStrategic or Co-development Partner · 26 June 2026Co-organiser of the 'Maritime Spurensuche' (Maritime Heritage Discovery) educational initiative. TAMSEN MARITIM hosts student groups visiting the shipyard to learn about modern shipbuilding and career opportunities. Partnership connects maritime heritage with today's innovative maritime industry.
• Fraunhofer IGPcoreStrategic or Co-development Partner · 1 January 2017Research cooperation (2017-2019) for Industry 4.0 methods in manufacturing large solid body models. Project developed an innovative preprocessor to increase accuracy of the 5-axis milling machine by determining and compensating elastic deformations. Co-financed by European Regional Development Fund.
• University of RostockminorStrategic or Co-development PartnerR&D partner for decarbonisation of marine vessels and other shipbuilding research initiatives alongside Fraunhofer Institute and Federal Ministry of Education and Research.
• Federal Ministry of Education and Research (BMBF)minorStrategic or Co-development PartnerR&D collaboration partner for maritime decarbonisation research projects alongside University of Rostock and Fraunhofer Institute.
• Wehrtechnische Dienststelle 71 (WTD 71)coreStrategic or Co-development PartnerCommissioned TAMSEN MARITIM to design and build two 20m STS (Securing, Transport, Towing) workboats for the German Navy – the shipyard's first newbuilding order from the Bundeswehr.
• DGzRS (German Maritime Search and Rescue Service)coreStrategic or Co-development PartnerLong-standing partner for newbuild and maintenance of sea rescue vessels. TAMSEN MARITIM has delivered 12 rescue boats to DGzRS and regularly maintains their rescue cruisers. 7 of 10 new DGzRS rescue units to be built at the shipyard.

Scale indicators10 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Damen Shipyards:

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/profile.php

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

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 Maritime Tamsen