New Stage V engine for 47 year old inland pusher tug GYAS
10 January 2024
Ports & terminals
Sustainability & Safety

New Stage V engine for 47 year old inland pusher tug GYAS

Recently, the engine installation of the 47-year old inland pusher tug ‘GYAS’ has been completely renewed. The old two-stroke diesel engine has been replaced by a Volvo D13-400 main engine. By investing in this new Stage V engine, the GYAS is ready for many more years of loyal service.


With the new Stage V engine GYAS can not only be operated significantly more efficiently and environmentally friendly. Also her capacities have increased and the crew can benefit from a more pleasant working environment. Among others, the new modern main engine results in:

  • a decrease of installed power of 22%;
  • a fuel reduction of over 30%;
  • an increase in bollard pull of over 40%;
  • a reduction of noise levels from 101 dBA to 68 dBA.

The inland shipping industry’s ambitions in the context of the Green Deal are significant, with the ultimate ambition of virtually emission-free and climate-neutral inland shipping by 2050. The new EU Stage V legislation plays an important role in realising this ambition. Marc Mazereeuw, director for Wagenborg Towage: “We see that more and more ports, clients and contractors are demanding cleaner ships to be able to do the work. For this reason, we have opted to invest in making the Gyas greener."

Modernizing the GYAS was not the first ‘veteran’ tugboat to be brought up to date. In 2021, the 52-year old WATERPOORT received a so-called Selective Catalyst Reduction (SCR) system. This system reduces nitrogen emissions by 85% up to stage V level.  

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