While in Spain, the commando communicated daily by telephone with the Naval Attaché of the Argentine Embassy in Madrid, who in turn would relay everything back to his superiors in Buenos Aires. The four-man commando group, travelling in three cars, moved southwards along the main roads. The mines were carried in a bag in the boot of a car, yet their shape and appearance would clearly indicate they were explosives if anyone saw them. While cover stories could be plausibly invented for the specialised military scuba gear, there was no way to explain the explosives, so they were careful to avoid the Spanish police on the roads.