officers of the Dienst Koninklijke en Diplomatieke Beveiliging (DKDB) (English: Royal and Diplomatic Security Service) of the National Police who receive similar training. Compared to the DKDB, the BSB is particularly dedicated to operating in high-risk locations. For example, the BSB provides security to both the ambassadors and the embassies in countries such as Iraq and Afghanistan. In addition to personal security details, the BSB conducts a wide range of other special security operations. The brigade is responsible for providing security during money and gold transports of the De Nederlandsche Bank, the Dutch central bank. In addition, the BSB runs the sky marshal program which has been active since 2004. Non-uniformed BSB operators regularly travel aboard passenger flights which have been indicated as to carrying a potential terrorist threat. Observation Team The Observatieteam (OT) (English: Observation Team) is deployed when the public prosecutor has approved an order for structural observation. The legal frameworks for such observations are codified in the Dutch Code of Criminal Procedures and the Special Investigative Powers Act. Additionally, the Observation Team of the BSB conduct observations on behalf of the General Intelligence and Security Service (AIVD). As opposed to their AIVD counterparts, BSB OT personnel is always armed. The OT distinguishes 'structural' and 'dynamic' observations. Structural observation consists of covert observation of individuals in order in to gain insight into their pattern of life. These operations are usually accompanied by the interception of telecommunications. Dynamic observations are usually conducted by teams consisting of 7 to 10 operators using vehicles, on foot or from one or multiple static locations. For dynamic observations which require motorised vehicles, the BSB has a large and diverse fleet of civilian vehicles at its disposal. The discrete operation of these cars and motorcycle is taught by the training and education division during a specialised driving course. Arrest Team The BSB has fielded an independent police tactical unit, known as Arrestatieteam (AT) (), since 1994. The AT is tasked with conducting the arrests of armed suspects, combating organised crime and neutralising other life-threatening situaties for which the regular police or Marechaussee are not adequately equipped or trained. The BSB has made this AT available to the Dienst Speciale Interventies (DSI) of the National Police. While the AT of the BSB resided under command of the DSI during operations, formally it is not part of the DSI. In addition, the brigade provides operators to