SummaryThe Shipbuilding 4.0 at the principles of the Industry 4.0 will transform the design, manufacturing, operation, shipping, services, production systems, maintenance and value chains in the all aspects of the shipbuilding industry. Over the last few years, the fourth industrial revolution has spread in almost all industries. The whole world is talking about Industry 4.0 which has increased implication in the manufacturing process and the future of the work. The impact of the Shipbuilding 4.0 will be significant. In the past, shipbuilding industry where continuously improved with new machines, software and new implemented organizational restructuring. In today shipbuilding industry, there are three main problems that are considered; production efficiency, the ship safety, cost efficiency and energy conservation and environmental protection. In order to create new value, the ship must become a Smart Ship capable of "thinking", and to be produced in Smart Shipbuilding Process. The aim of this article is a review of the present academic and industrial progress of this new industrial revolution wave in the shipbuilding sector called Shipbuilding 4.0 (Shipping 4.0, Maritime 4.0, Shipyard 4.0). Reviewed publications were analyzed different topics and level of improvements in the industrial aspects of the society. The implementation of the Shipbuilding 4.0 in the shipbuilding industry, presents the future, creating new value in the process, creating new demands with reduction in production and operational cost while increasing production efficiency.

Sandwich structures are well-known and frequently used solutions in marine applications, especially when structural stiffness is required. An important part of the sandwich structure is the core, which usually carries shear loads. Therefore, choosing a reliable test method and knowing the exact shear properties of the particular core used in the structural design is beneficial for every engineer. Shear properties of the FlexyFoam M-55, a closed-cell, lightweight PVC foam with an apparent density of 60 kg/m3, have been investigated according to the ASTM C273 standard, using the tensile and compressive loading of metal supporting plates glued to the PVC foam sample. A digital image correlation (DIC) technique was used to monitor the crack propagation, and the appearance of secondary stresses at the foam-adhesive interface and strain field for the representative sample was presented. Displacement was measured using the testing machine sensors and compared to the measurements from the DIC technique. Specimen manufacturing details, surface preparation, and the gluing sequence were described, and measuring equipment and experiment settings were presented. Stress-strain curves have been presented and shear modulus and ultimate shear strength of the foam were compared for each test approach. The results were discussed and compared with the manufacturer’s data, as well as with foams of similar densities. The well-established approach in testing the core material was discussed, and recommendations were given to improve the testing procedure.

Authors in this paper presented the analysis regarding influence of deck equipment positioning and trimming, which is directly connected with sails, on sailing yacht performance in sailing. The analysis is performed by on-field measuring during sailing using specialized equipment based on RaceQs application and GPS support. The analysis is related to light wind conditions without significant waves, then to moderate wind and waves and finally to storm wind and high waves. Data collecting was performed during 30 hours of measuring and monitoring where the relevant equipment was continuously repositioned and trimmed aiming to reach more boat speed for different sailing angles. The results are processed and presented. The research was enabled with help and support of Bavaria Yachts d.o.o. Further analysis is suggested for different wind conditions and sea states.

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In today's highly competitive shipbuilding business, gaining a competitive advantage between shipyards is extremely important. In order to have a competitive and sustainable shipyard, it is important for the management to continuously monitor and raise the productivity, efficiency and quality of the production process. One of the major issue in today’s shipbuilding is how to organize and conduct the efficient ship outfitting process as one of the most complex task within ship design, supply chain and production activities, particularly for high value added ships. To be able to manage, improve and optimize ship outfitting process it is necessary to establish its current technological level and relevant activities. Hence, in this paper authors are analysing the ship outfitting process with special attention to ship outfitting prior to ship launching, with a purpose to define and explain the criteria to be used for such technological level evaluation.

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Decision-makers in shipyards face the problem of determining the design cost concerning the information level contained in drawing and how it influences the shipbuilding process efficiency. Shipyards have their approach and shipbuilding practices about the level of functional technical documentation usage directly in ship production. However, decisions may vary related to the ship type, complexity, size, and deadlines. The shipbuilding decision-making optimization model based on functional technical documentation defines an algorithm for creating and analyzing the data representing the effects of applying functional technical documentation in ship production. Based on such analysis, it is possible to decide the preferred shipbuilding strategy, based on the level of functional technical documentation usage directly in ship production at the level other than one identified in the ship contractual stage, reducing overall shipbuilding costs. By varying different factors of the technological phase of ship production and the relative labor cost with the level of functional technical documentation usage directly in ship production, the curves of the shipbuilding cost and duration deviations, in relation with the value specified by the reference point, are obtained. Also, such analysis provides relevant conclusions about the trend of losses or savings of budget and labor hours based on the level of functional technical documentation usage directly in ship production.