THEY have no names, only numbers - and they wear black balaclava masks to maintain their anonymity. They can hit moving targets accurately while hidden in the undergrowth 100 metres away - and they shoot at the eyes. They are the members of Macau's newest police taskforce - the Special Operations Unit - and they graduated yesterday morning with honours. There had been nearly 200 volunteers to join the elite group, but only 30 men completed the rigorous six-month course organised by top trainers from the Grupo de Operacoes Especiais (GOE) - Portugal's equivalent of Britain's SAS. They will be on permanent standby to protect Macau's citizens from terrorists, hijackers and situations of extreme violence. They will also be available to protect certain VIPs, and to control potential civil disturbances. Police sources said although there had been few incidents in the past where such specialists would have been required - with the notable exception of a serious kidnapping 18 months ago - it was believed that the presence of a dedicated anti-terrorist unit was a vital part of security for the new international airport. Comissario Jose Rodrigues of the GOE, who led the training programme, said: ''It has been hard work to get this far, they must not slacken now.'' Comissario Rodrigues and the three other GOE trainers brought in from Portugal displayed their ultimate trust in the abilities of their pupils yesterday. The trainers stood still and stony-faced beside wooden figures as the men of Macau's special operations unit shot live ammunition neatly into the targets' faces. In another exercise the taskforce unit burst into a room to release some live ''hostages'' - shooting two bullets into each of their captors' cardboard heads. ''If you shoot at the head the terrorists won't answer you back,'' a riot policeman explained.