- 47 - 5. Staffing 82. The CPT wishes to point out once again the particular importance it attaches to the careful selection and appropriate training of supervisory staff in centres for immigration detainees. As well as possessing well-developed techniques of interpersonal communication, the staff concerned should be familiarised with the different cultures of the detainees and at least some of them should have relevant language skills. These requirements were not met in any of the immigration detention centres visited in the course of the 2013 visit; police officers assigned to duties in these centres were provided with no specific training at all. Moreover, the personnel, including the centre directors, rotated frequently;53 for example, at the Amygdaleza centre, police officers were seconded for periods of one month only, thereby undermining any possibility to acquire relevant experience. Police officers in all the centres visited did not engage in meaningful contact with the irregular migrants and, in fact, spent little, if any, time inside the accommodation blocks. For example, at Paranesti pre-departure centre, the 25 police officers stationed “inside” the facility but outside the accommodation blocks appeared to spend the whole time loitering around the registration office with their riot shields and truncheons lined up against the building. The situation was somewhat better at the Xanthi centre, where the police officers were located in the grass area in front of each accommodation building, but even there communications with detainees generally took place across a metal barrier. The delegation also observed that police officers openly carried batons inside the accommodation areas at the Amygdaleza and Paranesti pre-departure centres. As regards staff in the aliens holding centres, it is positive that the number of police officers per shift working inside the Filakio facility has been doubled to 16. However, the role of such staff remains one of purely guarding. 83. The time has come for the Greek authorities to ensure that immigration detention centres are staffed by properly trained officers, whose job description should include interacting with the detained irregular migrants and taking a proactive role towards resolving potential problems. Officers should be present inside the accommodation areas. Further, each centre should comprise both male and female officers. The CPT recommends that the Greek authorities review the staffing of immigration detention centres, in the light of the above remarks. Further, staff should not openly carry batons inside the accommodation areas of these centres. And, if it is considered necessary for riot control equipment to be available on site, that equipment should be stored in a designated facility out of the view of detained persons. 53 The Xanthi centre constituted something of an exception in this regard.