Asia-Pacific Geopolitics Digest

US naval blockade of Hormuz/Iran escalates amid ME tensions

US naval blockade of Hormuz/Iran escalates amid ME tensions

Key Questions

What is the current status of the US naval blockade in the Strait of Hormuz?

On April 13, the US implemented a full blockade of Iranian ports and ships, limited to exports, involving 15+ vessels including mine-clearing destroyers and the USS Tripoli en route. The situation is climaxing with no Iranian naval response so far.

How many US Navy ships are involved in the Hormuz blockade?

At least 15 US Navy ships are in place for the blockade, as mapped in recent reports. This includes mine-clearing destroyers and other vessels positioned to enforce the restrictions.

What has President Trump threatened regarding Iranian ships?

Trump has threatened the 'immediate elimination' of Iranian ships approaching the new blockade. He described the US forces as 'locked and loaded' and vowed to resume operations against Iran.

How has China responded to the US blockade?

China defied the blockade, with its Defense Minister warning the US not to meddle; two Chinese ships were allowed through as a one-off exception by Trump. China blasts the action as dangerous and urges ceasefire and mediation, vulnerable due to 80% reliance on Iranian crude.

What is the impact on oil prices from the blockade?

Brent crude has surged above $104 due to the blockade, causing queues and risks to Asia's energy supply, where nearly 90% of crude is now at risk. Stalled peace talks and naval standoff exacerbate the crisis.

What do allies and other nations say about the blockade?

Allies are hedging their support, while China and Saudis criticize it as dangerous and call for mediation. Russia’s Lavrov is flying to Beijing for non-NATO Middle East talks amid the tensions.

Is the blockade a full closure of the Strait of Hormuz?

The blockade targets Iranian ports and ships' exports specifically, not a complete closure of the strait. It involves naval enforcement but allows exceptions like the two Chinese ships.

What additional measures is China taking due to the conflict?

China is banning acid exports to preserve metals and fertilizer supply amid disrupted global sulfur chains from the Iran war. This persists alongside their criticism of the US actions.

Apr 13+ full US blockade of Iranian ports/ships (limited exports, 15+ vessels, USS Tripoli en route); Trump allows 2 Chinese ships, China defies w/transits/Lavrov Beijing; allies hedge; Brent >$104, Asia 90% crude risk/breaking point. China/Saudis urge ceasefire; acid ban persists.

Sources (9)
Updated Apr 15, 2026