neil ashdown is a specialist based on a think tank in london. >> you identified it's a surface to air system. >> we made that based on the photos tweeted by the president of panama. the cuban authorities have come out with a discovery which they list was contained in the cargo, a the missile systems that would be associated with the radar were identified and the number of spare parts for the systems. we are unable to make those identifications ourselves, only been able to identify the thing shown in the photo. >> how is the vessel being watched and what do you know about its movements? >> they say there was a tip off there were drugs on board and that's when the shipment was discovered. in terms of movements before that, based on information provided, we know it passed through the panama canal into the atlantic on the first of june. the system was then switched off and we don't know where it's movements were precisely until it is then picked up again in panama on the 11th of july. they -- the cuban government subsequently have said that the ship did indeed travel to cuba but we're wai