A number of countries dispatched warships to the Persian Gulf and Arabian Sea in an effort to ward off any Iranian closure of the Hormuz Strait.

Known warships operating off the coast of Iran – as of 24 January 2012
 United States Navy
Carrier Strike Group One
Carrier Strike Group Three
Carrier Strike Group Nine
 Royal Navy
HMS Argyll
HMS Somerset
RFA Lyme Bay
HMS Ramsey
HMS Echo
HMS Daring
HMS Westminster
HMS St Albans
Trafalgar-class submarine
 French Navy
La Motte-Picquet
A number of countries dispatched warships to the Persian Gulf and Arabian Sea in an effort to ward off any Iranian closure of the Hormuz Strait.
Known warships operating off the coast of Iran – as of 24 January 2012
 United States Navy
Carrier Strike Group One
Carrier Strike Group Three
Carrier Strike Group Nine
 Royal Navy
HMS Argyll
HMS Somerset
RFA Lyme Bay
HMS Ramsey
HMS Echo
HMS Daring
HMS Westminster
HMS St Albans
Trafalgar-class submarine
 French Navy
La Motte-Picquet
2011–12 Strait of Hormuz dispute