Merchant Ships Navigate Strait of Hormuz in Silence
The US Navy recommends that vessels deactivate electronic tracking systems to avoid targeting during transit through the Strait.
Updated on Oct. 20, 2026 in Transportation
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The UK Maritime Trade Operations centre recorded 12 shipping attacks in a single week in mid-October, with ten occurring inside the Strait of Hormuz. In response to rising threats, the US Navy is advising merchant ships to transit the area with AIS tracking and VHF radio emissions silenced.
Why it matters
Keeping vessels silent helps prevent electronic emissions from being used for targeting by hostile actors. This operational shift comes as shipping companies navigate increasing insurance complications, flag state exposure, and heightened risk in the southern route.
UKMTO data confirms 10 attacks occurred within the Strait of Hormuz during the week of 16 October, resulting in one lost vessel. The US Navy notes that approximately 200 transits have been completed despite the ongoing threat environment.
The players
UK Maritime Trade Operations
This is a Royal Navy capability that provides a link between the military and the merchant shipping industry to enhance maritime security.
US Naval Forces Central Command
This command is responsible for directing naval operations in the Middle East and surrounding maritime chokepoints.
The details
Merchant ships are currently bypassing standard electronic procedures by turning off AIS tracking and keeping radar on standby to avoid detection. Guidance on these transit protocols is being distributed to shipping companies through an FAQ hosted by the Liberian ship registry and a Turkish shipowners association.
Timeline
28 February: The war began.
14 June: The US Navy FAQ metadata date.
mid-July: Iran reimposed a blockade.
16 October: UKMTO published a weekly overview of shipping incidents.
Market Landscape
The shift toward silent navigation reflects a broader change in maritime transit logistics as shipping firms adapt to heightened regional conflict. These tactics mirror the volatility seen following the July 2026 reimposition of an Iranian blockade, which forced a permanent re-evaluation of merchant route security.
Rising maritime risks may lead to increased war-risk premiums, potentially impacting the cost of goods transported through the Strait. Shipping companies and stakeholders must weigh these security requirements against potential insurance cost adjustments and operational delays.
The takeaway
Maintaining silence during transit serves as a tactical defense against modern targeting capabilities. Vessels should prioritize these passive measures to mitigate exposure while professional organizations continue to refine safety guidance.
Further reading
Learn more about global trade challenges in our Transportation section.
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Should merchant ships prioritize operational security over transparent incident reporting in volatile maritime regions?
