Most Emission-Efficient Bulk Carriers
Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 3501 |
ANNA SMILE
IMO 9280770
|
74,823 | 2004 |
9.4
|
E |
| 3502 |
PRINCE MOUHAMMAD
IMO 9138692
|
24,110 | 1998 |
9.4
|
E |
| 3503 |
CAPE
IMO 9498224
|
31,639 | 2010 |
9.4
|
E |
| 3504 |
SUNFLOWER
IMO 9633020
|
28,364 | 2012 |
9.4
|
E |
| 3505 |
COSMIC ACE
IMO 9779927
|
13,604 | 2016 |
9.4
|
E |
| 3506 |
AMITY
IMO 9497517
|
29,996 | 2012 |
9.4
|
E |
| 3507 |
SOUL MERCY
IMO 9379674
|
31,922 | 2009 |
9.4
|
E |
| 3508 |
KARVUNA
IMO 9468619
|
21,178 | 2010 |
9.5
|
E |
| 3509 |
WHITE IVY
IMO 9370393
|
16,383 | 2008 |
9.5
|
E |
| 3510 |
EC FATMA
IMO 9509243
|
22,108 | 2009 |
9.5
|
E |
| 3511 |
MKK II
IMO 9145229
|
21,470 | 1998 |
9.5
|
E |
| 3512 |
AFRICAN JUNIPER
IMO 9326330
|
18,849 | 2005 |
9.6
|
E |
| 3513 |
CAPTAIN RABIE
IMO 9172387
|
35,366 | 1999 |
9.6
|
E |
| 3514 |
PETREL S
IMO 9363883
|
19,100 | 2006 |
9.7
|
E |
| 3515 |
MEDIQUEEN
IMO 9476410
|
17,149 | 2007 |
9.7
|
E |
| 3516 |
ELENA
IMO 9501215
|
24,968 | 2012 |
9.7
|
E |
| 3517 |
SALVINIA
IMO 9524815
|
18,969 | 2009 |
9.7
|
E |
| 3518 |
HYUNDAI BUSAN
IMO 9305659
|
80,102 | 2006 |
9.7
|
E |
| 3519 |
ZEINAB
IMO 9070424
|
26,441 | 1994 |
9.8
|
E |
| 3520 |
LADY NAEIMA
IMO 9223643
|
16,213 | 2000 |
9.8
|
E |
| 3521 |
ATAYAL STAR
IMO 9606962
|
16,805 | 2012 |
9.8
|
E |
| 3522 |
AFRICAN JOSEPH R
IMO 9333711
|
18,922 | 2006 |
9.8
|
E |
| 3523 |
AASFOSS
IMO 9904869
|
9,405 | 2022 |
9.8
|
E |
| 3524 |
A LINE
IMO 9246920
|
12,259 | 2001 |
10.0
|
E |
| 3525 |
DAYTONA-H
IMO 8520836
|
11,901 | 1988 |
10.1
|
E |
| 3526 |
EXPLOR
IMO 9460186
|
33,303 | 2011 |
10.2
|
E |
| 3527 |
SACURA
IMO 9497000
|
13,050 | 2011 |
10.2
|
E |
| 3528 |
ATAYAL BRAVE
IMO 9607590
|
16,811 | 2012 |
10.2
|
E |
| 3529 |
IMPERATOR
IMO 9367906
|
18,981 | 2008 |
10.3
|
E |
| 3530 |
NECO K
IMO 9146053
|
10,100 | 1996 |
10.3
|
E |
| 3531 |
ULUSOY-9
IMO 9498884
|
11,853 | 2008 |
10.3
|
E |
Which engines power the greenest fleets?
The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2024 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.
AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.