Navalyze · Market view · Segment
Oil tanker ships, 2023
1,929 oil tanker ships reported to THETIS-MRV for 2023, emitting 16.8 Mt of CO₂. Efficiency is measured as g CO₂/t·nm.
The segment at a glance
Operators
The 2023 public files do not name the companies managing each ship, so operator rankings start in 2024.
Efficiency by ship size
Bigger ships move a tonne of cargo for less fuel, so ships are compared within size bands. Each row is drawn against the segment median.
- Q1: ~14 kt24.1 g CO₂/t·nm
- Q2: ~30 kt10.6 g CO₂/t·nm
- Q3: ~49 kt8.66 g CO₂/t·nm
- Q4: ~68 kt6.43 g CO₂/t·nm
- Q5: ~101 kt4.86 g CO₂/t·nm
Q1 to Q5 split the fleet into fifths by average cargo carried, derived from the published ratios.
Who verifies the reports
Accredited verifiers check each ship's MRV report. Their share of the segment's ships and CO₂.
- DNV32.6% / 32.2%
- ABS24.4% / 23.2%
- Lloyd's Register15.5% / 13.7%
- RINA9.0% / 8.9%
- EMICERT5.5% / 4.9%
- ClassNK3.8% / 5.0%
- Korean Register2.8% / 2.6%
- Bureau Veritas2.2% / 3.3%
- Verifavia2.1% / 2.5%
- China Classification Society0.9% / 1.5%
- 5 others1.3% / 2.2%
How fuel is measured
Each ship's monitoring plan names one or more of the four MRV methods.
Most common combinations
- A42%
- B26%
- B + C20%
- C8%
- A + B + C2%
- A + C2%
- A + B1%
Share of 1,751 emission reports that name a method; a report can name several.
Notes
- Medians and rankings use 1,797 full-year reports with fuel; part-year and zero-fuel reports count towards totals only.
- THETIS reports time at sea on EU-scope voyages only, not time in port. CO₂ at berth is the closest measure of port activity it publishes.
- Speed and distance are derived from the published ratios; THETIS has no distance column.