Strait of Hormuz Sees Rise in AIS-Off Voyages Among Commercial Ships　ホルムズ海峡、AIS停止航行が一般商船にも拡大

Vortexa Analysis Shows 65% of Laden Tankers Crossed with AIS Signals Unconfirmed

ボルテクサ分析、積載タンカーの65％がAIS不確認状態で通航

　

According to vessel analytics company Vortexa, 65.2% of laden tankers departing the Strait of Hormuz in May appeared to have transited with their AIS (Automatic Identification System) signals unconfirmed, a practice referred to as a “dark transit”.

The company said such behaviour is no longer confined to Iran-linked fleets and shadow fleet vessels, but is increasingly being observed among mainstream commercial shipping.

■ The full article includes the following key points (approximately 2,000 words)

→ The share of laden tankers transiting the Strait of Hormuz with AIS signals unconfirmed rose above 65% in May

→ Analysis showing that AIS-off transits are no longer limited to Iran-linked fleets and are increasingly being adopted by mainstream commercial operators

→ An examination of recent developments in Middle East energy transportation, including UAE export flows and ship-to-ship transfers off Fujairah, which are becoming more difficult to track

→ An assessment of how the impact could extend beyond crude oil to LPG and LNG-related cargo movements

→ Consideration of the implications for Japan’s shipping and energy industries as reliance on AIS-based vessel tracking becomes increasingly challenging

Image courtesy of Vortexa

(The full article is available in both English and Japanese. The Japanese version follows the English article.)

ホルムズ海峡、AIS停止航行が一般商船にも拡大

ボルテクサ分析、積載タンカーの65％がAIS不確認状態で通航

　

　船舶分析会社ボルテクサ（Vortexa）によると、5月にホルムズ海峡を出港した積載タンカーの65.2％がAIS（自動船舶識別装置）の信号が確認できない状態（ダークトランジット）で通航した模様だ。

同社は、こうした航行が従来のイラン関連船隊やシャドーフリートだけでなく、一般商船にも広がっていると分析している。

■記事本文では以下の内容を読むことができます（記事全文約2,000文字）

→ ホルムズ海峡でAIS信号が確認できない状態で通航する積載タンカーが5月に65％超へ上昇

→ 従来のイラン関連船隊だけでなく、一般商船にも同様の航行が広がっている実態を分析

→ UAE輸出やフジャイラ沖STSなど、見えにくくなる中東エネルギー輸送の最新動向を解説

→ 原油だけでなくLPGやLNG関連貨物にも影響が広がる可能性を検証

→ AISデータへの依存が難しくなる中、日本の海運・エネルギー業界への示唆を考察

（続きは英語と日本語で書かれた本文でお読みください。日本語の記事は英文記事に続いて掲載されています）