Data Collection System
Abbreviation: DCS
IMO mandatory annual reporting of fuel oil consumption for ships >5,000 GT, used to support CII and EEXI.
In practice
DCS reporting via flag-state submitted to IMO. Verifier (typically the class society) audits the data each year. Operator uses the same data internally to identify low-CII voyages.
Regulatory detail & full definition
Mandatory annual reporting of fuel oil consumption for ships ≥5,000 GT in international voyages, under MARPOL Annex VI Reg. 27 and IMO Resolution MEPC.292(71). The DCS captures fuel consumption by type, distance travelled, and hours underway. Data is verified by the flag state or its Recognised Organisation and submitted to the IMO Ship Fuel Oil Consumption Database. The DCS data feeds the CII calculation and underpins IMO mid-term GHG measures. EU MRV captures broadly similar data for European voyages, and the two regimes are slowly aligning.
Authoritative source: MARPOL Annex VI (Air pollution) ↗
Related
Source: MARPOL Annex VI Reg. 27
High confidence
Editorial confidence: how we grade.