Since 2020, according to the International Convention for the Prevention of Pollution from Ships (MARPOL) amended in 2016, each Administration shall transfer the annual fuel consumption of its registered ships of 5,000 gross tonnage and above to the International Maritime Organization (IMO) after verifying them. The Administration needs stacks of materials, which must not be manipulated by ship companies, including the Engine log book and also bears an administrative burden to verify them by May every year. This study considers using the Automatic Identification System (AIS), mandatory navigational equipment, as an objective and efficient tool among several verification methods. Calculating fuel consumption using a ship’s speed in AIS information based on the theory of a relationship between ship speed and fuel consumption was reported in several examples of relevant literature. After pre-filtering by excluding AIS records which had speed errors from the raw data of five domestic cargo vessels, fuel consumptions calculated using Excel software were compared to actual bunker consumptions presented by ship companies. The former consumptions ranged from 96 to 123 percent of the actual bunker consumptions. The difference between two consumptions could be narrowed to within 20 percent if the fuel consumptions for boilers were deducted from the actual bunker consumption. Although further study should be carried out for more accurate calculation methods depending on the burning efficiency of the engine, the propulsion efficiency of the ship, displacement and sea conditions, this method of calculating annual fuel consumption according to the difference between two consumptions is considered to be one of the most useful tools to verify bunker consumption.

Abstract
 1. Introduction
 2. Factors affecting Fuel Oil Consumption of Ships
 3. AIS Technical Characteristics and AIS dataProcessing
  3.1 AIS Technical characteristic
  3.2 The Status of Ships
  3.3 AIS Data Pre-Filtering
 4. Fuel consumption Calculation using AISInformation
  4.1 Fuel Consumption Calculation Equation
  4.2 Fuel Consumption Output result
  4.3 The analysis of calculation Results
 5. Conclusion
 References

• Jinyoung Yang(Department of Maritime Transportation System, Mokpo National Maritime University)