Marine pollution has increased society concerns on issues of coastal, emission, global warming, climate change, and marine ecosystems. The pressures are in the shipping industry to adopt green practices and contribute to the better world. The shipping industry which involves in maritime supply chains has been encouraged to adopt the low carbon technologies and energy efficiency practices. However, to what extent the maritime supply chains practice the energy efficiency measures and CO2 emission reduction remain relatively unknown. While this pursuit is a positive indicator, there is still limited adoption in these seemingly cost-efficient technical and operational measures aiming at reducing energy cost. Thus, it is crucial to understand the current practices in order to institute a more realistic baseline and reliable evaluation towards future energy efficiency improvement. Moreover, all of these reduction measures must go through detailed planning and should engage the attention of management level and maritime stakeholders for effective implementation.