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Gulf of Oman: Dryad Maritime publishes vessel incident update and analysis

Attacks on tankers deepen tensions between Iran and the US, which have gradually escalated in 2019.

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UK-based specialist maritime operations company Dryad Maritime on Thursday (13 June) released an incident update and analysis report focusing on the recent attack of a crude oil tanker and a chemical tanker at the Gulf of Oman:

Reports indicate that two vessels transiting the Strait of Hormuz in South Easterly course were attacked, in an incident which is still being investigated. The two vessels involved have been identified as the crude oil tanker Front Altair and the chemical tanker Kokuka Courageous. Front Altair is Marshall Islands flagged, and Kokua Courageous Panama-flagged. The Front Altair is believed to be carrying 75,000 tons of Naptha originating from Abu Dhabi’s ANDOC. The Kokuka Courageous is believed to be carrying methanol, originating from Saudi’s Sabic and also Qatar. Front Altair’s speed is reported to have dropped from 12 kts at 0205 UTC, to 2.7 kts at 0321 local time, indicating the time of incident. Reporting indicates that a distress signal was reportedly sent by the vessel Hyundai Dubai at 0612UTC on behalf of the Front Altair. Kokua Courageous’ speed is reported to have dropped from 14 kts at 0133 UTC, to 0.2 kts at 0620 UTC with a distress signal being received at 0700 UTC. Front Altair’s position when it lost speed significantly was at N 25° 26’ 27.13, E 057° 23’ 18.42, at 0248 UTC.

Front Altair was believed to be fully laden when the attack took place, resulting in a large fire and the crew being forced to abandon ship. Reports indicate that the cargoship Hyundai Dubai aided in the rescue effort.

Reporting suggests that 21 members of crew have been evacuated from Kokua Courageous, and the crew are believed to have reported that its cargo of methanol is intact. Additional but unconfirmed reports have been received by Dryad sources indicating that IRGC vessels were the first vessels on scene to offer assistance. It is believed that this assistance was refused by the crew of the Front Altair, however unconfirmed reporting indicates that the crew of the Kokuka Couragous may have been taken to the Iranian Port of Bandar-e-Jask.

Both vessels appear to have indicated that they believe the attack originated from the surface, however further reports from the Front Altair indicate that the hull was breached on the starboard side partially below the waterline.

The incident was initially primarily reported by the UK Maritime Trade Operations (UKMTO) and the US 5th Fleet, which is believed to be in attendance at the scene.

Front Altair’s current position as reported by AIS is N 25° 22’ 59.21, E 057° 23’ 53.65, at 0945 UTC. Kokua Courageous’ current position is reported to be 50 km East of Front Altair.

Iranian media reports have claimed that Front Altair has sunk, however Frontline which operates the vessels has denied that this is the case at 0957 UTC.

Context

This latest incident has occurred one month and a day from the previous incidents where four vessels were targeted within the Fujairah anchorage. The latest incident has caused a steep price rise in oil, and Brent Crude has rose 3.85%, standing at $62.28 USD as at 1153 UTC.

Assessment

Incidents of this nature in relative close proximity are extremely worrying, and are indicative of rising tensions in the region. On a broader regional scale, the attack will serve to deepen tensions between Iran and the US, which have gradually escalated throughout 2019.

It is a realistic possibility that Iran or a proxy were behind this attack, however the situation remains fluid and there are a number of competing naratives that require examining. It is important to note that the attack on the Front Altair is reported to have struck the starboard side of the vessel, which was travelling in a southerly direction. Any Iranian involvement either directly or via a proxy is unlikely to have conducted an attack from the port side, as this would immediately give rise to allegations of Iranian shore launch projectiles would require Iran to refute blast diagnostic evidence from the outset. Thus far the methodology of a starboard side attack is consistent with what would be expected of Iranian involvement. The reported involvement of Iranian vessels in the rescue effort may also be an attempt to obscure intent in the aftermath of the attack however this cannot be confirmed.

However, any assessment of Iranian involvement must be contextualised, and must be analysed through the prism of self-interest and motive. States such as Iran are rational actors, and will not conduct attacks in the Strait of Hormuz merely to ‘disrupt’ global shipping, without there being a clear national interest in doing so. At a time where the Iranian economy is struggling and sanctions are biting, it seems surprising that Iran would endeavour to conduct such a bellicose strategy. It would also be remarkable that Iran would knowingly target vessels reported to be carrying ‘Japan-related cargo’ at the same time that the Japanese Prime Minister Abe is conducting talks in Iran. These inconsistencies in terms of interest and motive do not rule out Iranian involvement, but they do suggest that a wider regional narrative may be at play, and that the responsible party could in fact not be Iranian once a further investigation is completed. It is important to note that despite recent events pointing to Iranian involvement, no key lines of evidence indicating responsibility or intent have been identified. Whilst the security threat which the incident poses can be quantified and responded to, the underlying details are still emerging, and will continue to be assessed by Dryad.

In the short term, the threat to vessels in the Strait of Hormuz has undoubtedly risen, however this is still a localised event, and is likely not to be part of a pattern of events which will develop in the next 72 hours. Dryad deems that the threat from this event does not span into the wider Gulf of Oman, and vessels transiting through the Gulf are deemed to be safe. Vessels are advised to follow BMP5 best practice, and request routinely updated security briefings, when transiting the Strait of Hormuz.

Source: Dryad Maritime
Published: 14 June, 2019

 

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Bunker Fuel

Singapore: Bunker fuel sales drops by 6.8% on year in May 2026

4.55 million mt of various marine fuel grades were delivered at the world’s largest bunkering port in May, down from 4.88 million mt recorded during the similar month in 2025, according to MPA data.

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Singapore: Bunker fuel sales drops by 6.8% on year in May 2026

Sales of marine fuel at Singapore port dropped by 6.8% on year in May 2026, according to data from the Maritime and Port Authority of Singapore (MPA).

In total, 4.55 million metric tonnes (mt) (exact 4,548,000 mt) of various marine fuel grades were delivered at the world’s largest bunkering port in May, down from 4.88 million mt (4,878,100 mt) recorded during the similar month in 2025.

Deliveries of marine fuel oil, low sulphur fuel oil, ultra low sulphur fuel oil, marine gas oil and marine diesel oil in May (against on year) recorded respectively 1.79 million mt (-5.3% from 1.89 million mt), 2.29 million mt (-6.5% from 2.45 million mt), zero (-100% from 1,200 mt), 600 (35.2% from 1,700 mt) and zero (from zero).

Singapore: Bunker fuel sales drops by 6.8% on year in May 2026

Bio-blended variants of marine fuel oil, low sulphur fuel oil, ultra low sulphur fuel oil, marine gas oil and marine diesel oil in May, (against on year) recorded respectively 11,600 mt (-71.6% from 40,900 mt), 36,400 mt (-62.1% from 96,100 mt), zero (from zero), zero (from zero) and zero (from zero). B100 biofuel bunkers, introduced in February last year, recorded 12,800 mt (+573.7% from 1,900 mt). 

LNG and methanol sales were 70,300 mt (+56.2% from 45,000 mt) and zero (from zero) respectively. There were no recorded sales of ammonia for the month and so far since 2025.

 

Photo credit: Maritime and Port Authority of Singapore
Published: 15 June, 2026

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Bunker Fuel Quality

Bunker flash: High concentrations of catalytic fines, elevated acid numbers found in Singapore

Maritec-Naias issued an alert regarding high levels of catalytic fines and elevated acid numbers present in multiple VLSFO bunker samples from deliveries in the Singapore port.

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Bunker fuel testing and marine surveying business Maritec-Naias on Friday (12 June) issued an alert regarding high levels of catalytic fines and elevated acid numbers present in multiple VLSFO bunker samples from deliveries in the Singapore port: 

During the period of 20 May 2026 and 02 June 2026, Maritec Pte. Ltd. (hereafter referred to as Maritec-Naias) conducted testing on five samples representing Very Low Sulphur Fuel Oil (VLSFO) deliveries from two suppliers in the Singapore port. The analyses revealed Aluminium and Silicon (Al+Si) concentrations ranging from 61 mg/kg to 68 mg/kg.

It is important to note; these values exceed the ISO 8217:2010/2017 specification limit of 60 ppm but remain within the permissible tolerance limit of 72 ppm under ISO 4259 for a single test result. In this regard, Catalytic Fines content, (Aluminium+Silicon), above 60 ppm is regarded as high. Of the five samples, three originated from one supplier, while the remaining two were from another.

Aluminium and Silicon constitute the principal classes of abrasive solids in fuels. Elevated concentrations of such particles at the engine inlet can precipitate abnormal wear and tear of fuel system components, piston rings, and cylinder liners. To safeguard against this, many engine manufacturers stipulate a maximum threshold of 15 mg/kg Al+Si at the engine inlet.

The primary method of mitigating Catfines is through an efficiently operating fuel purification system. Monitoring Aluminium and Silicon levels both before and after centrifugation provides a reliable measure of the system’s effectiveness in removing these contaminants.

During a similar period, Maritec-Naias also tested fifteen bunker fuel samples representing VLSFO that exhibited elevated Acid Numbers, ranging from 2.0 mg KOH/g to 2.5 mg KOH/g. While these values remain within specification limits, they are nonetheless considered at higher side. Elevated Acid Numbers may stem from contamination with acidic compounds such as Phenolic compounds and Alkyl Resorcinols, often associated with Estonian Shale Oil. Such contaminants can lead to operational complications including sludge formation, fuel pump seizures, and compromised injection equipment cleanliness.

Maritec-Naias Recommendations

  • High Catfines monitoring: Maritec-Naias advises collecting samples at critical points within the fuel system — including the fuel oil tank transfer pump, before and after centrifuge, service tank, and after fine-filter — to evaluate the efficiency of fuel cleaning.
  • Elevated Acid Numbers: For fuels with elevated Acid Numbers, Maritec-Naias recommends conducting Gas Chromatography-Mass Spectrometry (GC-MS) using the Solid Phase Extraction (SPE) method to identify the specific acidic compounds present or upgrading your marine fuel testing package to MFTP Plus, which enables pre-emptive monitoring to detect major harmful substances prevalent in the market, such as Cashew Nut Shell Liquid (CNSL), Phenolic compounds and Alkyl Resorcinols that cause damage to equipment.

Maritec-Naias states, while all data and findings presented in this document are true, it does not reflect on the overall quality of fuel being supplied in Singapore region. If you intend to bunker at this region, please request for a Certificate of Quality (CoQ) prior to loading.

 

Photo credit: Hans Reniers on Unsplash
Published: 15 June, 2026

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Incident

Three dead after supply boat sinks following collision off Pasir Panjang Terminal

PCG recovered three bodies from the waters after a supply boat sank off Pasir Panjang Terminal on 12 June 2026 at about 9.30am following a collision with a landing craft.

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The Maritime and Port Authority of Singapore (MPA) on Friday (12 June) said a supply boat sank off Pasir Panjang Terminal at about 9.30am after colliding with a landing craft. 

MPA, Police Coast Guard (PCG), and SCDF Marine Division, immediately activated their crafts to the incident site and commenced search and rescue operations.

“The landing craft is stable with no reported injury to crew on board,” MPA said in a statement. 

PCG has recovered three bodies from the waters, believed to be deceased crew members of the sunken supply boat. Search and rescue operations, including diving operations, are ongoing to determine if there are other crew members from the supply boat missing.

“Port operations have not been affected. Navigational broadcasts have been issued advising vessels to keep clear of the incident area,” it added.

“Investigations into the incident are ongoing.” 

 

Photo credit: Manifold Times
Published: 15 June, 2026

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