SKY IRIS (IMO 9958066) detained at Shanghai, October 2026
A four-year-old Japanese-managed containership with a near-spotless PSC record has been detained at Shanghai, marking its first detention ever. Across 13 prior port state inspections, the vessel recorded just a single deficiency, making this an outlier event that will demand close attention from charterers and underwriters watching the vessel's next moves.
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SKY IRIS was detained at Shanghai on 8 October 2026 by Chinese port state control authorities. The THETIS record does not disclose the number or nature of the deficiencies that triggered the detention. The vessel's recognised organisation is Nippon Kaiji Kyokai (ClassNK), and the ISM company on record is SeoYang Shipping Co Ltd of Busan, South Korea. At the time of detention, AIS data placed the vessel at Baobei Anchorage on the China Coast, drawing 8.1 metres.
The vessel
SKY IRIS is a 1,000 TEU feeder containership built in 2022, flagged in Panama since delivery. She measures 137.65 metres LOA with a 25-metre beam, 9,940 GT and 12,312 DWT. Classed with Nippon Kaiji Kyokai (ClassNK, an IACS member) since delivery on 9 December 2022, this is a young vessel by any measure. She has sailed under the same name and flag since entering service. Her trading pattern, drawn from inspection ports, shows a vessel heavily concentrated on the intra-Asia feeder circuit: predominantly Vietnam (Haiphong and Ho Chi Minh City), with calls at Hong Kong, Busan, and now Shanghai.
Inspection history
This detention is genuinely surprising. SKY IRIS had passed through 13 port state control inspections since December 2022, all within the Tokyo MoU, without a single detention. Of those 13 inspections, 12 were entirely clean, with zero deficiencies recorded. The sole blemish was a fire safety deficiency (fixed fire extinguishing installation) found at Busan on 5 August 2026, just two months before the Shanghai detention. That Busan inspection did not result in detention. Vietnam accounts for the bulk of the inspection record: ten of the 13 inspections were conducted at Haiphong or Ho Chi Minh City, all returning clean results. A follow-up inspection at Hong Kong in February 2024 also found no issues. The deficiency rate across the full inspection history stands at 0.1 deficiencies per inspection, which is exceptionally low for any vessel, let alone one trading regularly in Southeast Asian waters where inspection frequency is high. The fire safety finding at Busan is worth noting in the context of the Shanghai detention: if fire safety was again a factor, it would indicate a recurring issue on a vessel that otherwise kept a clean sheet for over three and a half years.
Ownership and management
The ownership and management structure has been entirely stable since delivery. Registered owner Hiro Shipping Panama SA, a Japanese-controlled entity based in Imabari (Ehime prefecture), has held the vessel since 9 December 2022. Ship management and commercial management sit with Fukusei Sangyo KK, also based at the same Imabari address, operating a fleet of just two vessels. ISM management is handled by SeoYang Shipping Co Ltd of Busan, South Korea, which manages a fleet of ten ships. All three entities have been in their current roles since delivery. There has been zero management churn: no ownership changes, no manager swaps, no flag changes, and no name changes. The split-management structure, with a Japanese technical manager and a South Korean ISM manager, is a common arrangement in the Japanese domestic owner segment where vessels are commercially operated by Korean or other regional partners.
Risk profile
VesselScore rated SKY IRIS at 81.2 out of 100, placing the vessel in the low-risk band with a modelled detention probability of 1.18%. That score was generated on 9 October 2026, one day after the detention. The strongest contributors to the score were the near-zero deficiency rate (0.9 points lost out of a possible 15), zero management churn (no points lost), and a clean flag/class profile (no points lost). The vessel's youth contributed minimal age-related risk, losing just 1.6 points on the age baseline. Three AIS loitering events were recorded, costing 3.0 points on the AIS behaviour component, though no AIS gaps were flagged. The most notable drag on the score was the detention component (c2), which cost 10.0 points out of 20. This is noteworthy: the raw value of 0.5 and the 10-point penalty appear to reflect the current Shanghai detention being factored in at scoring time. Sanctions screening returned clear, and no casualties are on record. For a vessel scoring above 80, a detention is a statistical outlier; only around 1 in 85 vessels in this risk band are detained.
What to watch
The immediate question is what deficiencies Chinese PSC found at Shanghai. Until deficiency details are published, charterers cannot assess whether this was a one-off technical failure or something systemic. The fire safety deficiency recorded at Busan in August 2026 is the only prior data point to watch: if Shanghai's findings overlap with fire safety, it points to a specific equipment issue that was not fully resolved. A follow-up inspection will be required before release. Given the vessel's otherwise exemplary record, release should follow promptly once deficiencies are rectified. Charterers and underwriters should request the Shanghai detention report directly and confirm rectification before fixing. The vessel's next Tokyo MoU inspection will carry an elevated targeting profile as a result of this detention.
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