Navalyze · Bulk carrier · Ship

GULNAK

IMO: 9579028
Type: Bulk carrier
Average cargo carried: 29,495 t
Flag (estimated): Turkiye
Port of registry: İZmir
Technical efficiency: EEXI 5.22 g CO₂/t·nm

ISM company (DoC holder) in 2025: GULMAR DENIZCILIK NAKLIYAT VE TICARET ANONIM SIRKETI

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 25,629 t of cargo on average.

Fuel kg/nm

83.5

Bulk carrier median 86.5 kg/nm (−3%)

CO₂ per transport work (cargo)

10.3

g CO₂/t·nm · Bulk carrier median 8.24 (+25%)

Average speed

11.3 kn

Bulk carrier median 11.1 kn (+2%)

Fuel per day at sea

22.6 t/day

Fuel consumed

2,472 t

CO₂ emitted

7,836 t

Distance sailed

29,597 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,626 h

109 days, 30% of the year

Within the bulk carrier fleet, 2025

Set against all 3,611 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 kg/nmThis ship 80.1 kg/nm · median 82.6 (−3%)

61.0Ranks 1,625 of 3,611, lowest first114

Average speedThis ship 9.9 kn · median 10.7 (−7%)

8.8Faster than 26% of bulk carrier ships11.8

CO₂ per transport work (cargo)This ship 8.66 g CO₂/t·nm · median 7.90 (+10%)

4.80Ranks 2,149 of 3,611, lowest first15.9

Middle 80% of shipsMiddle 50%Bulk carrier medianThis ship

Where the emissions happen, 2020

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 ports13%
From the EU61%
Into the EU22%
At berth in the EU4%

Fuel burned laden

–

Not reported

CO₂ at berth

328 t

4.2% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

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 kg/nm

GULNAK
Bulk carrier median

70.080.090.0100.0

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

Average speed, kn

GULNAK
Bulk carrier median

8.09.010.011.012.0

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

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

GULNAK
Bulk carrier median

6.08.010.012.014.016.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+1.1 kn	−17%	−6%	−44%	−39%	1.1 kn faster, fuel per mile down 17%; better than speed alone explains (hull, engine or trade).
2023→2024	−2.4 kn	+24%	−3%	−64%	−5%	2.4 kn slower, fuel per mile up 24%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.7 kn	+7%	+0%	−21%	+9%	0.7 kn slower, fuel per mile up 7%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+2.1 kn	−5%	+15%	+3%	−2%	2.1 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2020→2021	−1.5 kn	−7%	−20%	+52%	+36%	1.5 kn slower, fuel per mile down 7%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.2 kn	+6%	+3%	−23%	+10%	Same speed, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+0.2 kn	+7%	+9%	+14%	−31%	Same speed, fuel per mile up 7%; in line with the speed change.

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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	GULMAR DENIZCILIK NAKLIYAT VE TICARET ANONIM SIRKETI	597	1,903	7,450	751	9.9	80.1	8.66	3%
2024	GULMAR DENIZCILIK NAKLIYAT VE TICARET ANONIM SIRKETI	1,273	4,021	13,200	1,507	8.8	96.5	14.2	–
2023	not published	2,826	8,827	36,264	3,243	11.2	77.9	15.0	–
2022	not published	3,373	10,539	46,140	3,870	11.9	73.1	13.8	–
2021	not published	3,471	10,839	44,921	4,593	9.8	77.3	14.1	–
2020	not published	2,472	7,836	29,597	2,626	11.3	83.5	10.3	–
2019	not published	3,052	9,542	38,591	3,350	11.5	79.1	9.41	–
2018	not published	2,497	7,814	33,713	2,982	11.3	74.1	13.6	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Bulk carrier median	vs Bulk carrier	Rank	Verifier	Methods
2025	GULMAR DENIZCILIK NAKLIYAT VE TICARET ANONIM SIRKETI	8.66	7.90	+10%	2,149 of 3,611	Verifavia	B
2024	GULMAR DENIZCILIK NAKLIYAT VE TICARET ANONIM SIRKETI	14.2	8.09	+75%	2,703 of 3,089	Verifavia	B
2023	not published	15.0	8.27	+81%	3,090 of 3,548	RINA	B
2022	not published	13.8	8.71	+58%	3,274 of 3,968	RINA	B
2021	not published	14.1	8.57	+64%	3,008 of 3,466	RINA	B
2020	not published	10.3	8.24	+25%	2,237 of 3,150	RINA	B
2019	not published	9.41	8.38	+12%	2,073 of 3,360	RINA	B
2018	not published	13.6	8.50	+60%	2,883 of 3,384	RINA	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.