alternative fuel.

Environmental protection according to the MARPOL, i.e. NOx/SOx effective reduction with relatively low costs.

thank you :)

But i think that is investigation and research on AUVs.

You can find many topics in marine renewable energy (OWC, point absorbers...etc).

Fuel reduction, alternative fuels, emissions (also particulate matter and particulate numbers). When looking into design, optimum fleet design is an important topic.

EEDI and energy saving...

Multi-task offshore platforms

Hybrid marine renewable energy converters

Net zero energy/emissions ships

From my point of view, research trends that got into my brain is,

First of all, Ship Automation, since automated machines trend nowadays.

Dynamic stability and hydrodynamic performance of ships, I saw a lot of topics for PHD position, all over the world which working on.

Unmaned underwater vehicles like ROV, AUV, and so on.