Iran tightens Hormuz grip
13 May 2026
Iran has expanded the maritime zone it considers under operational control around the Strait of Hormuz. According to Iranian-linked media coverage cited by analysts, the Islamic Revolutionary Guard Corps Navy now describes the Strait of Hormuz as a “vast operational area” stretching from Jask in eas
The Islamic Revolutionary Guard Corps Navy has officially expanded its operational control over the Strait of Hormuz, designating the region from Jask eastward as a vast maritime security zone. This development significantly alters the navigational landscape for merchant vessels transiting the Persian Gulf. Analysts note that increased Iranian military presence near these critical chokepoints raises the risk profile for tankers and bulk carriers operating in the area, necessitating heightened vigilance and updated risk assessments for all commercial shipping fleets.
This escalation directly impacts compliance with the International Ship and Port Facility Security (ISPS) Code, specifically Part A, which mandates rigorous security measures for vessels operating in high-risk areas. Under SOLAS Chapter XI-2, masters must ensure that Ship Security Plans are reviewed to account for these expanded zones. Furthermore, adherence to BMP5 (Best Management Practices) is essential for mitigating potential interdiction risks. Compliance departments must now prioritize real-time monitoring and ensure that all onboard security protocols align with the latest maritime security directives to avoid potential detentions or insurance complications.
Masters and navigating officers must exercise extreme caution when transiting these expanded zones. It is critical to maintain constant communication with the United Kingdom Maritime Trade Operations (UKMTO) and ensure that Automatic Identification Systems (AIS) remain active unless specifically directed otherwise. Navigating officers should conduct thorough bridge team briefings to review emergency response procedures, while masters must maintain strict adherence to international transit corridors to minimize the risk of unauthorized boardings or military challenges during their passage.
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