O&M port logistics - from a CTV perspective

Victoria Baagøe-Engels 1
1University of Southern Denmark, Department of Entrepreneurship and Relationship Management., 6000, Kolding, Denmark, 2Offshoreenergy.dk, 6700, Esbjerg, Denmark


An operation and maintenance (O&M) service port has a significant influence on the costs of a wind farm; However, it is not often a research focus. These days innovation development in vessels technologies and constant focus on cost reduction across the supply chain put extra pressure on offshore winds port logistic setup. For example, the request to O&M ports facilities and supply chain setup from CTV companies (vessel providers) has increased over the last years. But what is the optimal supply setup in O&M ports and what is necessary facilities and what is "just" nice to have? This has not been a research focus. Furthermore, what does it cost to have an ineffectual supply chain or a lack of facilities in an O&M ports setup?


The data is collected in three steps and the empirical context is Esbjerg, Denmark, which is known as probably the best Port in the world.


Some of the results showed that the supply chain has a major impact on cost increase or decrease, which can be divided into two. One in relation to the crew on CTV vessels, where hotel, parking, catering and transport are necessary factors. Two is in relation to the CTV vessels, where mechanic, welder and vessel electricians are necessary factors - Both are important to have within one hour.

The logistic O&M setup needs a 24/7 access, stockroom, crane, fenders, logical process for refilling or dismantling of fuel, electricity and water. This lead to a talk about the possible impact a one-stop shop potentially could have on decreasing the costs of the CTV companies.


There is a significant efficiency to be gained and cost savings to be achieved via having a supply chain within one hour from the O&M ports. For example CTV crews are allowed to work 14 hours a day, where they often use 12 of these hours on the CTV vessels. This require a hotel reachable within one hour and inefficient transportation will affect the operation time of the crews.

The same is applicable for the logistic O&M setup, since the lack of a facility affects the efficiency and costs of the CTV vessels and its crew. Lack of cranes can result in a one hour extra time for loading all the different equipment in the morning.


This paper identifies specific factors and illustrates concrete profit calculations that CTV companies can take into consideration. Aside from the profit calculation, this paper also identifies potential solutions or guidelines to current barriers for cost reduction, which are worth further attention. The result presents significant implication for current and future requests or requirements that ports need to take into consideration to become O&M ports or maintain the status as O&M ports for the future offshore wind industry.