Lawyers trying to extradite a British man to the US on terrorism charges have told a court he was found in possession of US naval intelligence.
Babar Ahmad is being held at a police station in London
Babar Ahmad, 30, of Tooting, London, was remanded in custody for a week by Bow Street magistrates on Friday.
It is alleged he used US websites and emails to solicit support for "acts of terrorism" in Chechnya and Afghanistan.
Details of US warship formations in the Gulf had also been found during an earlier arrest, the court heard.
British police had arrested Mr Ahmad, but released him without charge in December 2003.
Bow Street Magistrates' Court was told documents containing details of US warship formations in the Gulf were found near him during that arrest.
Rosemary Fernandes, appearing on behalf of the US government, told the court the documents, verified as "genuine" by the US navy, noted the ships were vulnerable to a small craft carrying rocket-propelled grenades.
She also said Mr Ahmad had links to a mole on board a US navy vessel.
Mr Ahmad is also accused of trying to drum up support and money for Taleban fighters in Afghanistan, using websites and emails.
They allegedly showed how money could be hand delivered to Taleban officials and how volunteers could travel to Afghanistan to fight.
He is also said to have had email links to a Chechen Mujahideen leader who planned the Moscow theatre attack in October 2002 in which 129 people died.
But Carolina Guiloff, defending, said Ahmad was an educated professional man with no previous convictions who had lived in Britain all his life.
Mr Ahmad, who is said to work with computers at Imperial College London, was arrested under anti-terror laws in South Kensington on Thursday and is being held on a US extradition warrant.
He faces four charges carrying sentences of between 10 years and life imprisonment relating to alleged offences between 1998 and 2003.
His case is not thought to be linked to 12 terror arrests on Tuesday.
He told the court he found the charges against him "a bit confusing" but made it clear he did not want to be extradited to the US.
Outside court one of the defence team, Muddassar Arani, said they were concerned about the extradition request.
She said: "It appears that anybody who is arrested in this country in relation to terrorism offences, when there's not sufficient evidence to prosecute...those individuals' extraditions are being sought by America."
One of Mr Ahmad's sisters, who did not want to publicise her name, said she was "shocked" when the police arrived at her home after arresting her brother.
She told The Muslim News she had to leave her house and said police did not tell her the search was completed until midnight.
Mr Ahmad's sister said: "There is no proof of his involvement in terrorism. It is all lies."
The authorities are likely to be granted 65 days to prepare the case for extradition.