The British Indian Ocean Territory Police serve in the British Indian Ocean Territory (BIOT) (situated in the Indian Ocean halfway between Tanzania and Indonesia). BIOT is a territory which does not have a permanent civil population, like most British Overseas Territories. The population are mostly members of the British Armed Forces and United States Armed Forces. As such the BIOT police consists of Royal Overseas Police Officers (ROPO), that are all currently members of either the Royal Marines or Royal Navy. Organisation The BIOT police (as of 2015) consists of: Senior Police Officer (ROPO 1) (Royal Navy Master at Arms or Royal Marine Colour Sergeant with Special Investigations Branch (SIB) experience) who acts as: the senior police person for the island, Primary Liaison Officer between international police forces, superintendent of prisons, senior officer in charge of supervision of ROPOs and provide reassurance to the island community regarding police and criminal activity. He/she is responsible to the BIOT Commissioner Assistant Senior Police Officer (ROPO 2) (Royal Navy Senior Rate) who assists ROPO 1 with his/her duties. He/she is SIB and CSI trained. ROPO 3 - Royal Navy Police Senior Rate. (SIB experience and CSI trained). ROPO 4 - Royal Navy Police Senior Rate. ROPO 5 - Royal Military Police Corporal, female. ROPO 6 - Royal Air Force Police Corporal, dog handler. ROPO 7 - Royal Marines Police Corporal/Lance Corporal. ROPO 8 - Royal Navy Police Leading Regulator, female. ROPO 9 - Royal Navy Police Leading Regulator. ROPO 10 - Royal Marines Police Corporal/Lance Corporal Duties The duties of the ROPOs are typical of service police, but also act as customs officers for the island of Diego Garcia in the British Indian Ocean Territory, as well as prison officers, as the Senior Police Officer acts as 'superintendent of prisons'. The offences dealt with by BIOT police have included: Road Traffic Offences (Inc Fixed Penalty Notices) Sexual Offences Offences Against the Person Drug Abuse/Misuse Statutory Offences Theft/Fraud Criminal Damage Burglary Public Order/Drunk Disorderly illegal fishing Activity Fire Arms/Ammunition MDA/Importation Special Investigation – Sudden Death Uniform and vehicles The ROPOs have epaulettes with collar numbers to identify them, similar to UK civilian police uniforms. BIOT police use 4x4/SUV vehicles to patrol and respond to emergencies, they are painted with the typical British Battenburg Pattern and have "BIOT POLICE" markings on the vehicles. Dog Unit (K-9) The BIOT Police also has a dog unit (also