Navalyze · Bulk carrier · Ship

NJ CALLISTO

IMO: 9497452
Type: Bulk carrier
Average cargo carried: 13,421 t
Port of registry: Basseterre
Technical efficiency: EEXI 5.45 g CO₂/t·nm
Former names: ALMIRANTE STORNI, GMB ETERNITY, CONDOR HAMBURG

ISM company (DoC holder) in 2025: NJ TRUST MARINE LTD

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 13,421 t of cargo on average.

Fuel per mile

77.1 kg/nm

Bulk carrier median 82.6 kg/nm (−7%)

CO₂ per transport work (cargo)

18.28

g CO₂/t·nm · Bulk carrier median 7.89 (+132%)

Average speed

7.6 kn

Bulk carrier median 10.7 kn (−29%)

Fuel per day at sea

14.0 t/day

Fuel consumed

175 t

CO₂ emitted

558 t

567 t CO₂eq incl. CH₄ and N₂O

Distance sailed

2,275 nm

CO₂ ÷ CO₂ per mile

Time at sea

300 h

13 days, 3% of the year

Within the bulk carrier fleet, 2025

Set against all 3,610 bulk carrier ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel per mileThis ship 77.1 kg/nm · median 82.6 (−7%)

61.0Ranks 1,386 of 3,610, lowest first114.1

Average speedThis ship 7.6 kn · median 10.7 (−29%)

8.8Faster than 4% of bulk carrier ships11.8

CO₂ per transport work (cargo)This ship 18.28 g CO₂/t·nm · median 7.89 (+132%)

4.80Ranks 3,328 of 3,610, lowest first15.93

Middle 80% of shipsMiddle 50%Bulk carrier medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports0%
From the EU29%
Into the EU36%
At berth in the EU35%

33% of this ship's CO₂ falls under the EU ETS (183 t).

Fuel burned laden

–

Not reported

CO₂ at berth

34.9%

Alongside in EU ports

Methane (CH₄)

0.0 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

Full-year reports only. The Bulk carrier median is the middle ship of all bulk carrier ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel per mile, kg/nm

NJ CALLISTO
Bulk carrier median

50.0100.0150.0200.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

NJ CALLISTO
Bulk carrier median

0.05.010.015.0

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

NJ CALLISTO
Bulk carrier median

0.020.040.060.080.0

’182018’202020’212021’222022’232023’242024’252025

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	−3.8 kn	+5%	−31%	−85%	+11%	3.8 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+2.0 kn	+3%	+24%	−39%	+59%	2.0 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2022→2023	−3.1 kn	−53%	−65%	+567%	−61%	3.1 kn slower, fuel per mile down 53%; better than speed alone explains (hull, engine or trade).
2021→2022	+3.2 kn	−13%	+17%	+152%	−58%	3.2 kn faster, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.5 kn	+122%	+133%	−90%	+480%	0.5 kn faster, fuel per mile up 122%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+6.7 kn	−33%	+177%	+518%	–	6.7 kn faster, fuel per mile down 33%; better than speed alone explains (hull, engine or trade).
2018→2019	−8.9 kn	+50%	−71%	−92%	–	8.9 kn slower, fuel per mile up 50%; worse than speed alone explains (fouling, weather, loading or trade).

Part-year reports are left out of these comparisons. Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025part-year	NJ TRUST MARINE LTD	92	294	1,144	144	7.9	80.5	–	–
2025	AIO Shipmanagement Ltd	175	558	2,275	300	7.6	77.1	18.28	–
2024	NJ TRUST MARINE LTD	1,108	3,504	15,038	1,315	11.4	73.7	16.42	–
2023	not published	1,759	5,503	24,496	2,596	9.4	71.8	10.30	–
2022	not published	563	1,790	3,675	294	12.5	153.2	26.19	–
2021	not published	258	827	1,459	157	9.3	176.8	62.50	–
2020	not published	1,178	3,735	14,814	1,674	8.8	79.5	10.78	–
2019	not published	285	891	2,396	1,118	2.1	119.0	–	–
2018	not published	2,244	7,046	28,248	2,569	11.0	79.4	10.80	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Bulk carrier median	vs Bulk carrier	Rank	Verifier	Methods
2025part-year	NJ TRUST MARINE LTD	–	–	–	–	Verifavia	A
2025	AIO Shipmanagement Ltd	18.28	7.89	+132%	3,328 of 3,610	Verifavia	A
2024	NJ TRUST MARINE LTD	16.42	8.09	+103%	2,808 of 3,089	Verifavia	A
2023	not published	10.30	8.27	+25%	2,434 of 3,548	EnvService	B
2022	not published	26.19	8.71	+201%	3,845 of 3,968	EnvService	B
2021	not published	62.50	8.57	+629%	3,466 of 3,466	EnvService	B
2020	not published	10.78	8.24	+31%	2,331 of 3,150	EnvService	B
2019	not published	–	–	–	–	EnvService	B
2018	not published	10.80	8.50	+27%	2,453 of 3,384	EnvService	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Bulk carrier ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's bulk carrier ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.