OSD-IMT Design portfolio Azistern 2250 e Harbour Tug
OSD-IMT Tug Azistern 2250 e

Azistern 2250 e Harbour Tug Ship design

The Azistern-e is a powerful, low-emission compact e-tug. Among other roles, the vessel is perfectly equipped to deliver excellent harbour assistance.

The Azistern-e has the typical low resistance stable hull and all round visibility that is associated with all Azistern designs. It is driven by a revolutionary podded drive and that it has a flexible and green electro/diesel-electric configuration,

The hybrid power of the 22 m LOA / 50 BP Azistern-e is generated by two 970 kW variable speed gensets and is supported by two 400kWh lithium battery packs. The low-emission tug can be delivered compliant with IMO Tier 3 requirements with after-treatment system suitable for ECA areas and is equipped with an innovative energy management system as well. The uniform and perfectly optimized loading of the propulsion system ensures low maintenance and fuel costs. Transient sailing and maneuvering can be performed using the batteries with zero emissions.

The Azistern-e is highly maneuverable, and the vessel’s power train has a remarkably short reaction time. By using the batteries as a booster, maximum bollard pull can be achieved within seconds. The relatively small size of the engines and the shaftless configuration frees up more space below deck, providing optimum flexibility in respect of the division of space and piping.

As a result of its podded drive and the double elastic mounting of its gensets, the MLC compliant vessel will also provide the highest comfort level for its four-men crew.

Principal characteristics

22.25 m
Breath Moulded:
10.80 m
BP ahead:
50 tonnes
Frame spacing:
550 mm

Other information

Main Gensets:
2 x 970 kW
2 x
Azimuthing Electric Podded Drives:
Battery pack:
2 x 400 kWh

OSD Azistern Tug Brochure


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The Azistern 2250 e is a powerful low emission compact e tug

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