Maritime Expertise since 1947.

About us


WESELMANN, Maritime Expertise since 1947.

Founded in 1947, Weselmann’s head office is located in Hamburg, the heart of Germany’s maritime industry.

We offer a range of technical consultancy services for the shipping industry, including ship valuations, damage and condition surveys, repair supervision and follow-up surveys for newly built vessels of all kinds.

What we do

Ship Valuations

As independent marine experts and evaluators, we provide market valuations for new buildings and second-hand vessels and offshore constructions.

We work with many of Germany’s leading ship financers and international banks, as well as national and international shipping companies, ship owners, KG houses and underwriters.

Marine Surveys

At Weselmann, we offer a wide range of inspections and technical assessments, inspecting approximately 750 ships and marine structures worldwide per year.

Towage Approvals & Heavy Lift Supervision

We have a wealth of international experience in towage approvals and heavy-lift supervision.

Prior to operations being carried out, we make assessments to satisfy underwriters and owners and ensure all procedures meet the appropriate criteria.

The scope of evaluation depends on the type of towage/lift.

Assessments include a desktop evaluation and check of the towage plan and procedures together with recommendations, as well an on-site technical inspection of the vessel and towage/lifting arrangement.

Marine Consultancy Services

Since Weselmann was founded in 1947 we have built up decades of experience in the field of Marine Consultancy Services. 

Our knowledge spans Marine Engineering and Naval Architecture related to design, calculations, drawings, supervision, advisory services and, with the expansion of the company, we now also cover commercial and operational aspects.

Inland Waterway Services

As the appointed consultants for the Hamburg Port Authority and the Central Ships Inspection Commission for Inland Waterway Vessels (ZSUK), Mainz, our history of providing them with dedicated services spans decades.

At Weselmann, not only are we accredited to act on behalf of the authorities, we also perform an advisory role directly to owners, assisting with new constructions, conversions, repairs etc. as well as covering stability and strength calculations, tendering, supervision etc.

Risk Assessment and Loss Prevention

We provide independent risk assessment and loss prevention on behalf of marine underwriters and P&I Clubs.

Condition surveys require a deep knowledge of the technical and operational aspects of the trade, international regulations, and safety requirements, as well as the risks to which insurers are exposed.

The Loss Prevention process is based on formal risk assessment of potential hazards systematically identified within Safety Management systems.

Our team of experienced surveyors will deliver a detailed assessment to the client’s requirements.

Remote Vessel Assessment and Monitoring

If a physical inspection is not possible due to location, costs or a client’s wish to use a remote monitoring system, we are also qualified to provide this service.

WESELMANN can provide a standard solution for the process and remote assessment, however the scope of the evaluation can also be discussed and defined in accordance with the needs of the client.

Factory Acceptance Tests

The factory acceptance test (FAT) is a detailed examination performed by the vendor upon completion of the manufacturing process to verify equipment meets the requirements and functionality indicated in the datasheet, specification and purchase order.

We currently provide this service for numerous shipyards, protecting their interests during the FAT in order to guarantee quality and compliance as per the specification of equipment purchased from the supplier. This includes all marine-related equipment, such as engines, thrusters, boilers, evaporators etc.

Our international experience spans many years, working on behalf of shipyards engaged in the construction of standard tonnage as well as large cruise ships and sophisticated luxury yachts.


We provide superintendent inspections and general supervision services for the technical departments of ship companies.

Either short or long-term assignments, which may include regular fleet inspections, handling of ad hoc technical matters, supervision of constructions and arrangement of necessary repairs etc.

Thanks to a strong background covering every class of ship-management, along with solid experience of superintendence and supervision services across a range of projects, our team has all the technical expertise required to meet the client’s needs.

Expert Witness and Advisory

As expert witnesses or technical advisors in marine enquiries and investigations, our crew offer a wealth of international experience.

Over the years we have acted on behalf of international clients in countless disputes and arbitrations, attending court cases in Germany, as well as the UK, Denmark and Singapore.

Accident investigation is important in order to determine reponsibility as well as prevent recurrence.

Sustainability Assessment

Sustainability initiatives have become one of the prime focus areas in all industries including shipping and shipbuilding.

Through our in-depth knowledge and decades of experience, Weselmann can provide sustainability assessment of projects within the shipping and shipbuilding industry.