A British engineer denied Tuesday that navigation systems he developed and allegedly sold to Iran could be used to steer military spy aircraft, as he went on trial for breaking German export laws. James Bulmer, 58 and Iranian co-defendant Ali Mobaraki, 24, are accused of exporting seven satellite navigation systems to Iran for use in unmanned reconnaissance planes. Prosecutor Nikolas Schlachetzki said the pair concealed the destination of the equipment by applying for licenses to export them to India or Dubai. "They knew very well that they would never get approval for the crisis-region Iran," Schlachetzki told the state court. The two men, who were arrested during a series of police raids in May, could be sentenced to up to five years in jail if found guilty.