🇰🇷 South Korea
Pacific Ocean · Tanker Terminal
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None of the 162 vessels our AIS feed observed within 25 nm of Ulsan between 29 Apr 2026 and 5 Aug 2026 broadcast an IMO number on the OFAC, EU, UK or UN sanctions list today. The feed saw only part of the traffic, so this does not mean no listed vessel called here. The feed has delivered no positions since 5 Aug 2026, so these figures will not change until it resumes.
Not listed
Ulsan is not inside any Joint War Committee listed area (circular JWLA-035, 16 September 2026).
Source: Joint War Committee circular JWLA-035, 16 September 2026 (LMA/IUA), JWC Listed Areas for hull war, piracy, terrorism and related perils.
Between 29 Apr 2026 and 5 Aug 2026, ArcNautical's AIS feed observed 162 distinct vessels at Ulsan, with Tanker making up 61% of those with a ship-type code — higher than the Pacific Ocean regional average of 25%. Voyages from Ulsan in South Korea cross the world's largest ocean basin, where route optimisation and weather routing have significant financial implications — a single transpacific crossing can consume hundreds of tonnes of fuel, and a one-knot speed variation over a 12-day voyage materially affects both cost and schedule. The western Pacific generates more tropical cyclones than any other basin (≈26 named storms annually), with typhoon season June–November producing winds above 150 knots and waves exceeding 15 metres. North Korea sanctions enforcement is a significant compliance concern: UN Security Council resolutions prohibit ship-to-ship transfers to DPRK vessels, and dark-activity (AIS disablement) is a common evasion signal in the East China Sea and Yellow Sea.
Routed sea distances from Ulsan to the principal global hubs, computed by ArcNautical's routing engine — around land and through the canals a ship actually uses, not great-circle.
Our AIS feed observed 162 distinct vessels at Ulsan between 29 Apr 2026 and 5 Aug 2026; 123 carry a confirmed AIS ship-type code. The most common categories:
The feed has delivered no positions since 5 Aug 2026, so these figures will not change until it resumes.
Ulsan falls under the Tokyo MoU. The Tokyo Memorandum of Understanding (Asia-Pacific) maintains the most active publicly-available regional PSC programme. Across the last 24 months, the Tokyo MoU detention dataset records 5,577 distinct vessel detentions (sourced from OpenSanctions, as of 2026-10-04). Vessel-level detention probability is computed by ArcNautical using flag performance, vessel age, deficiency history, and ownership opacity.
The last 10 vessels our AIS feed recorded arriving between 29 Apr 2026 and 5 Aug 2026:
| Arrived | Vessel | Flag | Type |
|---|---|---|---|
| 2026-07-30 | BLUE OCEAN | 🇰🇷 KR | Tanker |
| 2026-07-15 | Unknown vessel | Unknown | |
| 2026-07-10 | EVER CALM | 🇵🇦 PA | Cargo |
| 2026-07-09 | ARIDAIOS | 🇱🇷 LR | Tanker |
| 2026-07-09 | Unknown vessel | Unknown | |
| 2026-07-07 | OCEAN GAEA | 🇧🇸 BS | Tanker |
| 2026-07-07 | AL NIGYAN S/T | 🇫🇷 FR | Tanker |
| 2026-07-07 | Unknown vessel | Unknown | |
| 2026-06-27 | BUNNAHABHAIN | 🇲🇹 MT | Tanker |
| 2026-06-24 | KAHLA | 🇸🇦 SA | Tanker |
The feed has delivered no positions since 5 Aug 2026, so these figures will not change until it resumes.
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