Innovation and sustainability in shipbuilding: container ships, LNG tankers and the growing demand for skilled labour

Container ships and LNG tankers are the backbone of the global trade in goods and energy supply. At the same time, the shipyards that build and maintain these colossi are facing a structural problem: the shortage of skilled labour is making qualified shipbuilding personnel a scarce resource. What lies behind the technical developments in modern shipbuilding - and why the industry is increasingly relying on skilled labour from Eastern Europe.

Estimated reading time: 6 minutes

Why is sustainability becoming increasingly important in shipbuilding?

Innovation and sustainability are becoming increasingly important in container shipbuilding. The focus here is on two goals: lower energy requirements and the reduction of CO2 emissions. It is worth taking a differentiated view: Measured in terms of the volume of goods transported, sea transport is already one of the most environmentally friendly forms of transport. Nevertheless, the industry continues to drive efficiency forward - for environmental reasons, but also for economic reasons. Burning less fuel saves costs. Those who produce fewer emissions retain access to strict regulatory zones worldwide.

How do modern ships become more efficient?

Optimisation of the hull shape

Just as a car resists air, the hull of a ship resists water - except that water is much denser than air. Modified hull shapes allow the water to flow more easily around the ship and thus reduce the resistance to travelling. This is complemented by special coatings that reduce the adhesion of the water to the hull and by air lubrication. Air is expelled from the hull under water so that less water has direct contact with the hull.

Drive systems and propellers

Improved lubrication in the drive systems reduces the internal resistance of the machines. This means that more power reaches the propeller. The propellers themselves are also undergoing continuous development. More modern designs reduce the formation of pressure zones on the rear of the propeller blades and thus cavitation, which reduces efficiency.

Waste heat utilisation through steam turbines

Diesel engines on ships not only produce propulsion energy, but also considerable amounts of waste heat, which normally remains unutilised. Modern steam turbines utilise this waste heat to generate steam. This is then used either as additional propulsion or to generate electricity for the on-board systems. An intelligent concept that significantly increases the efficiency of the entire system.

Alternative fuels and hybrid solutions

Methanol, LNG, ammonia and hydrogen are the fuels that shipbuilding engineers are working on today. In combination with hybrid solutions and battery storage, not only can emissions be reduced - batteries also make manoeuvring in port easier and reduce local emissions there to almost zero.

Digital systems and smart containers

Fleet management software optimises routes and speeds in real time, thus saving fuel. Modern containers monitor their temperature and track their position via GPS - which brings considerable efficiency gains, especially for refrigerated containers.

Why are LNG ships technical masterpieces with extreme requirements?

LNG ships, bulk carriers and tankers form the backbone of global energy and raw materials transport. LNG tankers in particular place extraordinary demands on construction and maintenance.

In its liquid state, LNG - liquefied natural gas - has only one 600th of its gaseous volume. The liquefaction itself does not take place on the ship, but on land by repeatedly pressing, cooling and expanding the gas to -162 °C. The ship maintains this temperature, but does not liquefy the gas itself. The ship maintains this temperature, but does not liquefy the gas itself.

The highly specialised, highly insulated tanks are used on board - often spherical or prism-shaped, always with double walls and membrane systems made of thin metal foils that prevent gas from escaping or heating up. The safety systems are correspondingly complex: Pressure relief valves, leak detection systems, fire extinguishing systems and redundant control systems are standard.

LNG tankers reach lengths of over 300 metres. Bulk carriers can reach up to 400 metres. ULCCs (Ultra Large Crude Carriers) transport more than 350,000 tonnes of oil. These dimensions require specialised shipyards with large dry docks, heavy-duty cranes and a high quality assurance standard - areas in which Germany is traditionally strong.

What does this mean for the demand for skilled labour?

The increasing technical complexity of ships is significantly increasing the demands on personnel at shipyards and suppliers. At the same time, the pool of available skilled labour in Germany is shrinking. In particular, we are looking for

• Welders with certifications according to DIN EN ISO 9606, experienced in MAG, TIG and submerged arc welding
• Pipe fitters and insulators for cryogenic LNG systems
• Electricians and electrical engineers for complex on-board systems and hybrid drives
• Shipbuilding engineers and technical planners for design and system integration
• Fitter and industrial mechanic for machines, power units and hydraulic systems

Eastern European countries - above all Poland, Croatia and Romania - have an established shipbuilding tradition and trained specialists who fulfil these requirements. Many have already worked in German or northern European shipyards and are familiar with the quality standards and safety requirements.

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Shipbuilding specialists from Eastern Europe - enquire now

Are you looking for welders, pipe fitters, electricians or engineers with shipyard experience? We provide qualified shipbuilding personnel from Eastern Europe - quickly, legally compliant and with the right certificates.

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Frequently asked questions

Which skilled labour is particularly sought after for the construction of LNG ships?

Particularly in demand are pipe fitters and insulators with experience in cryogenic systems, welders with certifications for special materials (stainless steel, aluminium, nickel-based alloys) and electrical engineers for the complex control and safety systems on board.

Can Eastern European specialists fulfil the German safety standards at shipyards?

Skilled workers from EU countries who have already worked in German or Northern European shipyards are familiar with the relevant DGUV regulations and safety requirements. For newcomers, the prescribed on-site safety instructions are mandatory anyway.

What does the placement of shipbuilding personnel from Eastern Europe cost?

The costs depend on the occupational group, qualification level and duration of the assignment. We will provide you with a concrete offer after a brief needs assessment. Contact us using the enquiry form.

How long does it take to be ready for use?

Usually 1-3 weeks. During this time, A1 certificates are applied for, qualification certificates are checked and all contract documents are prepared. If you have an urgent need, please contact us directly.

Does the German minimum wage apply to posted shipbuilding personnel?

The German minimum wage applies to all employees working on German territory, regardless of their country of origin. The shipbuilding industry is also subject to collectively agreed minimum wages, which we take into account in our calculations.

Do you need shipbuilding subcontractors on a contract basis instead of temporary labour? You can find information on this at zeitarbeit-international.de.