Navalyze · Market view · Segment

Offshore ships, 2025

614 offshore ships reported to THETIS-MRV for 2025, emitting 3.3 Mt of CO₂. Efficiency is measured as g CO₂/t·nm.

Offshore ships often have no cargo metric and enter the EU ETS only in 2027.

The segment at a glance

Median ship

1,367

g CO₂/t·nm

Fuel per mile

83 kg

Median ship

Average speed

4.6 kn

Median ship, distance over hours at sea

Hours at sea

2,343

Median ship, EU-scope voyages (27% of the year)

CO₂ at berth

10.7%

Share emitted alongside in EU ports

Ships burning LNG

of 91 benchmarked

Operators

Who runs offshore ships in EU trades, and how their fleets compare. Technical shows efficiency, speed and time at sea; commercial shows the allowance bill.

#	Group
1	SAIPEM (Portugal) - Comercio Maritimo, Sociedade Unipessoal LDA.	6	–	–	–	–	–	9.3%	–
2	Dredging Environmental and marine engineering NV	26	–	–	–	–	–	7.0%	–
3	Dredging & Maritime Management	16	–	–	–	–	–	10.6%	–
4	PGS Geophysical AS	6	–	–	–	–	–	2.3%	–
5	Tidewater3 companies	29	–	–	–	–	–	4.0%	–
6	Solstad Shipping AS	15	–	–	–	–	–	9.1%	–
7	Allseas4 companies, 1 in offshore	7	–	–	–	–	–	30.4%	–
8	ESVAGT A/S	43	+47%	2,006	76	3.2	7,157	5.4%	–
9	Heerema Marine Contractors Nederland SE	4	–	–	–	–	–	17.4%	–
10	Rohde Nielsen A/S	15	–	–	–	–	–	4.2%	–
11	Eidesvik AS	12	–	–	–	–	–	5.9%	–
12	Subsea 7 Int'l Contracting Ltd	16	–	–	–	–	–	14.7%	–
13	Island Offshore Management AS	11	–	–	–	–	–	12.2%	–
14	Aurora Offshore Management AS	18	+15%	1,567	137	3.8	2,004	4.1%	2
15	Havila3 companies, 2 in offshore	12	−31%	942	66	4.0	5,920	6.0%	–
16	Boskalis Offshore Long Distance Towage B.V.	7	–	–	–	–	–	4.0%	–
17	Seaway 7 Offshore Contractors B.V.	3	–	–	–	–	–	33.6%	–
18	Fugro Marine Service B.V.	18	–	–	–	–	–	16.3%	–
19	Olympic Shipping AS	11	–	–	–	–	–	13.0%	–
20	REM MARITIME AS	10	+1703%	24,651	68	4.2	6,074	5.3%	–
21	PHOENIX OFFSHORE SRL	11	–	–	–	–	–	7.2%	–
22	DEME Offshore NL BV	3	–	–	–	–	–	6.4%	–
23	Sea World Management SAM	5	−78%	301	239	3.7	2,824	17.3%	–
24	Technip UK Limited	5	–	–	–	–	–	17.0%	–
25	JD Crafts A/S	7	–	–	–	–	–	0.0%	–

Operators with at least 3 ships in this segment. Figures cover their ships in this segment only, so a group active in several segments (MSC runs container and cruise ships) has its full total on the market page. Groups combine ISM companies matched on name and known ownership; tell us at info@navalyze.com if one is in the wrong group. Click a column to rank by it.

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.

0.25×0.5×segment median2×4×Median

Q1: ~3 t38,000 g CO₂/t·nm
Q2: ~87 t3,550 g CO₂/t·nm
Q3: ~238 t1,040 g CO₂/t·nm
Q4: ~658 t467 g CO₂/t·nm
Q5: ~4,157 t77.3 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.

Share of CO₂Share of ships

DNV64.1% / 64.8%
Bureau Veritas12.0% / 13.0%
ABS10.3% / 4.2%
Lloyd's Register7.5% / 3.3%
RINA4.1% / 10.4%
Verifavia1.5% / 2.1%
EnvService0.2% / 0.3%
Swiss Climate0.2% / 0.8%
Polish Register of Shipping0.1% / 0.3%
ICS Verification Services0.0% / 0.8%

How fuel is measured

Each ship's monitoring plan names one or more of the four MRV methods.

A · Bunker delivery notes

41%

Fuel bought, corrected by tank soundings

B · Bunker tank monitoring

63%

Tank readings on board

C · Flow meters

36%

Meters on the fuel lines to engines and boilers

D · Direct measurement

CO₂ measured in the exhaust

Most common combinations

B36%
A26%
B + C18%
A + B + C7%
C5%
A + C5%
A + B2%

Share of 611 emission reports that name a method; a report can name several.

Notes

Medians and rankings use 91 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.